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1
Mahmood, Sami H. "Computational Methods in Material Science-Editorial." Material Science Research India 17, SpecialIssue1 (August 1, 2020): 01–02. http://dx.doi.org/10.13005/msri.17.special-issue1.01.
Повний текст джерелаАнотація:
he current revolution in Materials Science leading to vast advances in pre-existing and emerging technologies had significantly impacted all aspects of our modern life. The continuous efforts in searching for new functional and smart materials facilitated the design of miniaturized and more efficient devices, and led to great advancements in pharmaceutical, medicinal, agricultural, energy related industries, and many more. Before employment in a given application, a newly developed material needs to be fully characterized and tested for efficient delivery and fulfillment of industrial and technological requirements.
2
Sharma, Vipul, Suneel Kumar, Kumbam Lingeshwar Reddy, Ashish Bahuguna, and Venkata Krishnan. "Bioinspired Functional Surfaces for Technological Applications." Journal of Molecular and Engineering Materials 04, no. 01 (March 2016): 1640006. http://dx.doi.org/10.1142/s2251237316400062.
Повний текст джерелаАнотація:
Biological matters have been in continuous encounter with extreme environmental conditions leading to their evolution over millions of years. The fittest have survived through continuous evolution, an ongoing process. Biological surfaces are the important active interfaces between biological matters and the environment, and have been evolving over time to a higher state of intelligent functionality. Bioinspired surfaces with special functionalities have grabbed attention in materials research in the recent times. The microstructures and mechanisms behind these functional biological surfaces with interesting properties have inspired scientists to create artificial materials and surfaces which possess the properties equivalent to their counterparts. In this review, we have described the interplay between unique multiscale (micro- and nano-scale) structures of biological surfaces with intrinsic material properties which have inspired researchers to achieve the desired wettability and functionalities. Inspired by naturally occurring surfaces, researchers have designed and fabricated novel interfacial materials with versatile functionalities and wettability, such as superantiwetting surfaces (superhydrophobic and superoleophobic), omniphobic, switching wettability and water collecting surfaces. These strategies collectively enable functional surfaces to be utilized in different applications such as fog harvesting, surface-enhanced Raman spectroscopy (SERS), catalysis, sensing and biological applications. This paper delivers a critical review of such inspiring biological surfaces and artificial bioinspired surfaces utilized in different applications, where material science and engineering have merged by taking inspiration from the natural systems.
3
Rizzoni, Raffaella, Frédéric Lebon, Serge Dumont, and Michele Serpilli. "Editorial for the Special Issue “Advances in Multiscale and Multifield Solid Material Interfaces”." Technologies 10, no. 1 (February 18, 2022): 34. http://dx.doi.org/10.3390/technologies10010034.
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4
Kharitonov, Aleksey, and Olga Smirnova. "Special Mortars for Repair Masonry: The Problem of the Optimization." Advanced Materials Research 1122 (August 2015): 78–81. http://dx.doi.org/10.4028/www.scientific.net/amr.1122.78.
Повний текст джерелаАнотація:
Destruction masonry is a common problem. The nature of the material of masonry and the degree of preservation offers different combinations of technological methods of repair. In this regard it has formulated one of the main tasks of restoration materials science - finding the optimal composition of a material with a large number of variables in the presence of rigid boundary conditions in a short time. The solution to this problem lies in the area of mathematical modeling using the methods of planning of experiments. In this regard the aim of this study is the development of methods for optimization of mortars that allows getting the desired result in a relatively short period of time.
5
Kostopoulou, Athanasia, and Dimitra Vernardou. "Special Issue: Perovskite Nanostructures: From Material Design to Applications." Nanomaterials 12, no. 1 (December 29, 2021): 97. http://dx.doi.org/10.3390/nano12010097.
Повний текст джерелаАнотація:
In the past decade, perovskite materials have attracted great scientific and technological interest due to their interesting opto-electronic properties. Nanostructuring of the perovskites, due to their reduced dimensions are advantageous in offering large surface area, controlled transport and charge carrier mobility, strong absorption and photoluminescence, and confinement effects. These features, together with the unique tunability in composition, shape, and functionalities in addition to the ability to form efficient, low-cost, and light-active structures make the perovskite nanostructures efficient functional components for multiple applications, ranging from photovoltaics and batteries to lasing and light-emitting diodes. The purpose of this Special Issue is to give an overview of the latest experimental findings concerning the tunability in composition, shape, functionalities, growth conditions, and synthesis procedures of perovskite structures and to identify the critical parameters for producing materials with functional characteristics.
6
Radziszewski, Piotr, Karol Kowalski, Michał Sarnowski, and Piotr Pokorski. "Environmentally friendly material and technological solutions of road pavements." Budownictwo i Architektura 13, no. 1 (March 11, 2014): 305–16. http://dx.doi.org/10.35784/bud-arch.1948.
Повний текст джерелаАнотація:
In recent years road construction is a subject of dynamic changes. The main challenge for designers and technologists is to develop durable and environmental friendly road technologies that can be successfully applied on natural valuable areas. The paper presents selected modern material and technological solutions used for road pavements on areas under special protection (eg Natura 2000). An example of modern environmentally friendly solutions in road construction are: asphalt pavements with the addition of rubber from used car tires, asphalt mixtures with reduced emissions of volatile substances, “quiet” pavements, pavements from recycled materials and from local materials, “biologically active” pavements (permeable mineral layers). Modern and ecological pavements are the important part of science activity of Warsaw University of Technology. New ongoing project is designed to identify the main directions of technological development of road construction in the next 30 years, with a particular emphasis on the sustainable development and environmental protection. As a part of the two ongoing projects, test sections of pavement have been completed. One of test sections with the addition of crumb rubber and the second one as a “quiet” pavement. For the next years, the sections will be monitored.The proper selection of materials and technologies on natural valuable areas does not deteriorate the durability of road pavement, comfort and safety on the roads and at the same time it can improve environmental safety without interfering with the functioning of valuable ecosystems.
7
Sviridov, A. V., A. A. Skupov, A. N. Afanasev-Khodykin, and E. V. Golev. "SPECIAL ASPECTS OF MANUFACTURING OF FIXED JOINTS FROM SYNTHESIZED MATERIAL EP648." Aviation Materials and Technologies, no. 1 (2022): 17–29. http://dx.doi.org/10.18577/2713-0193-2022-0-1-17-29.
Повний текст джерелаАнотація:
The paper studies the effect of electron-beam welding modes on the structure and mechanical properties of workpiece joints obtained by selective laser melting metal-powder composition of EP648 alloy. The technological characteristics of serial brazing alloys of grades VPr4, VPr11-40N, VPr42, VPr50, VPr24 and the strength of joints at elevated temperatures during soldering of the EP648-PS alloy have been determined. We also studied the feasibility of using vacuum heat treatment before brazing the EP648 synthesized material and homogenizing heat treatment after it.
8
Luo, Hong Jie, Li Zhang, Zheng Guo Xu, and Yuan Sheng Yang. "Effect of Technological Parameters on Preparation of Mg-Based Foam Materials." Materials Science Forum 749 (March 2013): 356–60. http://dx.doi.org/10.4028/www.scientific.net/msf.749.356.
Повний текст джерелаАнотація:
As a novel material, Mg-based foam material not only has fantastic physical characteristics, such as low density, high specific surface area, high specific strength and stiffness, and good biocompatibility, but also has special functional properties, for example, electromagnetic wave shielding, vibration reduction, sound absorption, and so on. It can be widely applied to aeronautical and aerospace, military, shipbuilding, transportation, automotive and medical industries. Mg-based foam material was prepared by direct foaming in magnesium alloy liquid in this study, and the effect of technological parameters on the products, such as addition amount of and granularity of SiC particles and MgCO3 particles, stirring temperature, stirring time, stirring velocity, foaming temperature and foaming time, was investigated. The aim of this research was to develop a new technology which could fabricate large scale Mg-based foam material in air condition. The results showed that variations of technological parameters may affect preparation of the foam materials in some extent and resulted in the changes of the products in apparent density, porosity and structural uniformity. The light weight Mg-based foam with homogeneous pores could be obtained by suitable combination of the technological parameters.
9
Politkovskaya, Irina, Daniil Khvichiya, and Larisa Artamonova. "Economic Institutions of the Converged Technological Platform for Sustainable Development." E3S Web of Conferences 278 (2021): 03004. http://dx.doi.org/10.1051/e3sconf/202127803004.
Повний текст джерелаАнотація:
The study of the economic institutions of the diffusion of convergent technologies in the modern economy has a direct connection with sustainable development. The expansion of ultra-modern industries in the course of the "tertialization" of the economy (the growth of the sector of high-tech material and non-material production) makes it possible to significantly reduce resource consumption and the burden on the environment, while maintaining and increasing traditional economic values (income, well-being, employment, quality of life). The expansion of convergent technologies in technologically advanced countries is taking place in parallel with the formation of a "green" economy, which forms an independent technological platform for sustainable development, and may become the main one in the coming decades. The innovative upgrade of the extractive industries up to the Industry 4.0 level, based on this platform, requires special support from the state, primarily in the extractive countries. A special role in this process is assigned to the institutional support for the diffusion of convergent technologies, which is especially in demand in the Russian economy.
10
Cegła, Marcin. "SPECIAL CERAMICS IN MULTILAYER BALLISTIC PROTECTION SYSTEMS." PROBLEMY TECHNIKI UZBROJENIA 147, no. 3/2018 (January 4, 2019): 63–74. http://dx.doi.org/10.5604/01.3001.0012.8312.
Повний текст джерелаАнотація:
The paper presents some questions of designing and testing for modern ballistic protecting screens and applied materials especially such as ceramics. Continuous development of present ballistic composite materials enforces the optimisation of existing solutions for ballistic protections in respect to the mass, thickness and costs of material. In times of technological arm race a reduction of armour weight by 5% is a success. It may be achieved by development of new solutions of armour systems applying the newest materials. Ballistic ceramics both enhances the resistance of the armour against armour piercing projectiles and reduces its areal dencity in relation to traditional steel armours due to high mechanical properties, low density, high hardness and dissipation of energy at the mechanism of breaking. The paper illustrates the development of ceramic based armours and the structure of a multilayer ballistic protection, and finally the meaning of its particular layers in fighting the projectile. Moreover the impact of mechanical properties of some ceramic materials used for designing a protection system into its ballistic resistance is discussed.
11
Fledrich, G., I. Pálinkás, and R. Keresztes. "Turning ZrO2 ceramics." International Review of Applied Sciences and Engineering 1, no. 1-2 (December 1, 2010): 3–6. http://dx.doi.org/10.1556/irase.1.2010.1-2.1.
Повний текст джерелаАнотація:
Abstract In place of brittle ceramics used so far have appeared up-to-date so-called tough ceramic materials resisting better against mechanical effects [1]. Such material is the zirconium-dioxide, too. The important advantage of hard-turning is the applicability of universal tool. Various outlines can be formed by a tool given. Machining ceramics in case of using traditional machining (turning, milling, drilling) requires special technological conditions (tools, machine-tools, technological parameters, etc.) [2] which are developing presently. We would like extending our research work in this course, too.
12
Kulikov, Mihail U., Vitaliy E. Inozemtsev, and Myo Naing Oo. "Technological Method for the Finishing Process of Fusible Alloy." Key Engineering Materials 581 (October 2013): 224–28. http://dx.doi.org/10.4028/www.scientific.net/kem.581.224.
Повний текст джерелаАнотація:
The way is developed by the combined process of finishing machining. In this method, surface treatment is due to the combined effects of cutting tool and anodic dissolution of metal under the influence of an electric current in the electrolytic solution. Applying of this method allow the processing of aluminum and copper alloys to obtain higher quality parameters of the obtained surface, including special material.
13
Tsizh, B., and Z. Dziamski. "Technological Methods of Forming Thin Semiconductor Layers. Part 2." Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 21, no. 92 (November 8, 2019): 3–7. http://dx.doi.org/10.32718/nvlvet-f9201.
Повний текст джерелаАнотація:
Features and basic technological methods of formation of thin layers of semiconductor materials in a vacuum with the method of thermal spraying in a quasi-closed volume are analyzed. The disadvantages of thermal spraying of thin films of multicomponent semiconductor compounds in an open vacuum are indicated. The designs of special collapsible evaporator chambers for thermo-vacuum sputtering in a quasi-closed volume containing the raw material and substrate in quasi-isolated conditions are presented. They allow to create and manage the necessary temperature corrections between the evaporator, lining, walls and other structural elements. The designs of special collapsible evaporator chambers for thermo-vacuum sputtering in a quasi-closed volume containing the raw material and substrate in quasi-isolated conditions are presented. They allow to create and manage the necessary temperature corrections between the evaporator, lining, walls and other structural elements. It is shown that the spatial temperature distribution in the discussed constructs provides the evaporation (sublimation) of the source material, the reflection of vapor from the heated walls, the intensive exchange interaction between the gas phase and the condensation surfaces and the prevailing condensation on the substrate surface, which contributes to the diffusion mechanism of the transfer of matter and to the thermodynamically balanced growth process for films. It is shown that for all modifications, to a greater or lesser extent, the conditions for the isolation of the localized volume and the equilibrium of the condensation process are fulfilled by creating the necessary temperature gradient. It is indicated that it is problematic to use such structures for mass production due to their complexity and technological features. That is why the method of thermal spraying of thin films in the quasi-closed volume is most often used in the production of epitaxial monocrystalline layers for scientific research and experimental development, and for industrial production it is very effective to develop methods for obtaining thin films, which from one hand combine universality of thermal spraying in opened vacuum and from another hand allow to bring the processes of evaporation (sublimation) and condensation closer to thermodynamic equilibrium, for example, various types of “hot walls”. It is noted that the analyzed methods or their modifications are these necessary methods of creating thin-film semiconductor structures with predetermined properties.
14
Jeal, Yvette, Vincent de Paul Roper, and Elaine Ansell. "Deaf people and libraries ‐ should there be special considerations? Part 2: material and technological developments." New Library World 97, no. 2 (April 1996): 13–18. http://dx.doi.org/10.1108/03074809610110127.
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15
Sharma, Anubhav, Sachin Maheshwari, and Pradeep Khanna. "Surface Composite Fabrication by Friction Stir Processing: A Review." E3S Web of Conferences 309 (2021): 01150. http://dx.doi.org/10.1051/e3sconf/202130901150.
Повний текст джерелаАнотація:
Newer materials with unique properties are needed to cater the ever-increasing industrial demands to meet new challenges concerning technological advancements. Quest for special materials and processes is prevalent as conventional materials fail to level up. Composite materials promisingly bridge this gap by providing controllable properties at reasonable costs. Their scope of application can further be drastically enhanced by subjecting them to special surface processing treatments. Friction stir processing (FSP) is one such promising process that can meet the stringent applicational demands. Composites are increasingly being used in industries for properties like high strength to weight ratio, increased hardness, stiffness, ductility, corrosion resistance, etc. FSP, a solid-state material modification technique, has proved its caliber in surface composite fabrication. Some attention-seeking advantages of FSP include peerless efficiency, less tool wear rate, and ability to modify material locally are some of many attention-seeking advantages. Despite being cost-effective FSP also manages to eliminate the drawbacks of the conventional manufacturing process. FSP reinforces a special material into the parent material surface to attain specific properties. Properties so developed depend on parameters like: tool geometry, traverse speed, rotation speed, number of passes etc. The present paper aims to review comprehensive information on fabrication of surface composites by FSP, process parameters, properties, industrial applications, and future scope. Key Words: Friction stir processing surface processing treatments surface composites material modification process parameters.
16
Kong, Ling Bo, Gang Zhao, and Xian Zhang. "The Analysis for Chemico-Mechanical Practices Using in Polymer Material Machining." Applied Mechanics and Materials 723 (January 2015): 892–95. http://dx.doi.org/10.4028/www.scientific.net/amm.723.892.
Повний текст джерелаАнотація:
The polymeric composites materials (PCM), having specific characteristic self-lubrication, have got the name-the materials antifrictional self-lubrication (MAS). In compositions MAS except matrixes-of the thermoreactive resins are included special fillers. The structure material in defines the characteristic received products. For the reason increasing working characteristic PCM necessary study of the influence of the thermodynamic conditions centrifugal litho on shaping the structure PCM. For study of the influence technological parameters is required corresponding to equipments. The analysis of phenomena taking place when polymers interact with aggressive mediums has been made. Corresponding experimental research has been done and methods to direct changes of proceed material have been developed.
17
Shelimanova, O., and V. Tkachenko. "Development of technological line for obtaining flax trust." Energy and Automation, no. 4 (September 23, 2020): 78–85. http://dx.doi.org/10.31548/energiya2020.04.078.
Повний текст джерелаАнотація:
The intensification of one of the most energy-intensive processes - the process of drying the material - contributes both to the creation of energy-saving technologies for processing crop products, and to solving the problem of obtaining dried material of a given quality. The purpose of this study is to develop energy and resource-saving technology for industrial preparation of linen trusts. Previous studies have shown that extracting flax stalks with water before the lobe stage helps to reduce the time before the main phase of fermentation of pectin. The effect of hydrothermal treatment on the next impregnation increases with increasing temperature, especially sharply this increase occurs at temperatures above 60 0C. As a result of research, a thermobiological method of flax stem lobe was developed, which is the basis of a technological line combining the processes of flax straw lobe, washing, deodorization and drying of the obtained flax trust, followed by its hydrothermal treatment. The line operation mode is discrete-continuous. Processing of raw materials is carried out in the containers of a special design providing immersion of raw materials in liquid and its movement on technological operations. After loading, the container is placed in the tank of the first hydrothermal treatment, where it is in heated water at a temperature of 90 ... 95 0C. Next, the soaked raw material is reloaded into the tank of the second hydrothermal treatment to stop the microbiological process and high-quality washing of the material in heated water at a temperature of 50 ... 70 0C. Due to the intensification of the process 3 ... 5 times due to the creation of appropriate aerodynamic and thermal humidity modes, the three-tier conveyor unit is modernized into a single-belt one, in the last zones of which the linen trust is brought to conditioned humidity by steam-air treatment. Experimental-industrial inspection of the technological line showed that the total duration of the main process is reduced by 1.5 ... 2 times, the specific costs of heat, electricity, water are reduced (by 20 ... 30%) and the yield of long fiber is increased by 0.5 .. 1.0%) with the improvement of its quality indicators, the degree of mechanization of technological operations increases.
18
Varlamov, Y., V. Kotukh, and K. Palyeyeva. "THEORETICAL RESEARCH OF THE RECIPE OF SUPPLEMENTARY MATERIAL OF TECHNOLOGICAL PURPOSE FOR ENSURING ECOLOGICAL BEZ-PEPYKHYRA VYROPYRA." Municipal economy of cities 4, no. 157 (September 25, 2020): 134–39. http://dx.doi.org/10.33042/2522-1809-2020-4-157-134-139.
Повний текст джерелаАнотація:
In the manufacture (repair) of products of transport pipeline systems, auxiliary materials are widely used, which play the role of lubricants, cooling, cleaning and other substances. Special requirements are imposed on the composition of such substances, which are developed in accordance with the technological instructions, since they are, as a rule, chemically active, surfactants of organic and inorganic origin. Therefore, not only the quality of processing of structural elements of transport pipeline systems, but also the environmental safety of the techno-logical process of their manufacture (repair) depends on the composition and mass fraction of ingredients in these substances. Of particular importance in solving problems on this problem belongs to the theory of predicting the formation of the composition of effective auxiliary materials, assessed by technological, economic, sanitary and hygienic and other indicators that are directly related to the formulation of these materials. The theoretical foundations and methods for creating auxiliary materials for technological purposes in the practice of specialized enterprises are implemented using the example of a simplified technological scheme. Ac-cording to this scheme, the action of each source of deviations (errors in the composition of the auxiliary material) is evaluated separately, and the other sources are “off,” that is, the principle of superposition is implemented. For a qualitative reflection of the technological uniformity of any two constituent ingredients in terms of their influ-ence coefficients, the concept of "intersection" is used, and all possible intersections between pairs of constituents form a square matrix of intersections of dimensions. The level of effective homogeneity, which predetermines the quality of the auxiliary material for technological purposes, depends on two groups of indicators that equally affect this effective homogeneity. Thus, any variant of the formulation of an auxiliary material consisting of groups of constituents with the maximum level of objective closure always corresponds to a certain variant of an ordered series of ingredients. Keywords: auxiliary material, transport pipeline systems, error, quality, reliability, environmental safety, manufacturing, repair.
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Garkina, Irina, and Alexander Danilov. "Tasks of Building Materials from the Viewpoint of Control Theory." Key Engineering Materials 737 (June 2017): 578–82. http://dx.doi.org/10.4028/www.scientific.net/kem.737.578.
Повний текст джерелаАнотація:
From the viewpoint of control theory is given the synthesis of building materials. A control of structure and properties of the material is carried by changing the relevant technological parameters. Material is regarded as an object of control in mathematical modeling. The model is presented as a solution to the Cauchy problem for an ordinary differential equation fourth-order. The synthesis is based on parametric identification of mathematical models. The parameters are typical points of the kinetic processes of the formation of physical and mechanical characteristics of the material. Among them: roots of the characteristic polynomial; inflection points; the extreme points, etc. Applications of this approach to the synthesis of building materials for special purposes are given.
20
Ryschenko, M. I., L. P. Shchukina, Ya N. Pitak, S. L. Lihezin, and E. I. Humirov. "Studies to establish the possibility of using coal-enrichment waste as an energy raw material in ceramic technologies." Scientific research on refractories and technical ceramics 118 (July 11, 2018): 132–41. http://dx.doi.org/10.35857/2663-3566.118.12.
Повний текст джерелаАнотація:
The article presents the results of a study of high-carbon coal-enrichment wastes that to be used in the technology of building ceramics to replace technological fuel at the stage of isothermal excerpt during the firing of semi-finished products. The mineral composition of the waste, the composition of its organic part, thermal and technological properties have been studied. The comparative characteristics of the properties of ceramic materials obtained on the basis of mixtures with the use of clay raw materials and coal waste in different quantities are given. In laboratory conditions, materials were obtained that were heat treated at a temperature of 950 °C under the usual regime and a special regime that simulates self-baking due to the heat of oxidation reactions of the combustible part of the coal waste. The expediency of using special oxidizing agents in the form of a combination of ammonium and calcium nitrate salts, whose function is to create an oxidizing medium in the fired material volume due to the formation of O2, NO2 and N2O oxidizing agents during thermal decomposition, is shown. It is established that the mechanical strength of ceramic samples is only 15 % less than for conventional firing samples and is 8.5 N/mm2 for mass with 22 % of coal waste. Based on the conducted studies, it is shown that it is possible in principle to use a special firing regime without consuming an energy carrier at the stage of excerpt for fuel-containing materials using coal waste as energy raw materials.
21
Varlamov, Y., V. Kotukh, and K. Palyeyeva. "TECHNOLOGICAL ASPECTS OF ASSESSMENT OF RELIABILITY, QUALITY AND ENVIRONMENTAL SAFETY OF SUPPLEMENTARY MATERIAL FOR MANUFACTURE OF TRANSPORT PIPELINES." Municipal economy of cities 3, no. 156 (July 1, 2020): 56–61. http://dx.doi.org/10.33042/2522-1809-2020-3-156-56-61.
Повний текст джерелаАнотація:
When carrying out finishing (finishing and lapping) operations necessary for the manufacture (repair) of products of transport pipeline systems, special attention is paid to the auxiliary materials necessary for the imple-mentation of this technological process. The basis of these materials are chemically active, surfactant, flammable and explosive substances of organic and inorganic origin, developed according to a certain recipe in a strict combination of ingredients and with high requirements for quality output. During the implementation of the technological process of manufacturing or repair of products of transport pipeline systems, the auxiliary material is often considered as a kind of random process that has a certain impact on the environmental safety of these systems. This material for technological purposes is characterized by a num-ber of indicators that do not have numerical values, but to interpret them it is necessary to build a system of logi-cal and analytically related relationships, taking into account the required formulation of auxiliary material. In practice, these indicators of the material represent some criterion (criteria), which in the n-dimensional space can be represented as a vector of the technological state of the auxiliary material on the basis of its integrated evalua-tion. At present, a general scheme of work on the automated design of the formulation of auxiliary material based on the aggregate design method has been developed. The task of this method is to give the developed auxiliary material the maximum potential energy, as well as to increase its shelf life and reduce the risk of environmental impact. In addition, there are certain requirements for the ingredients of the material, and the formulation of the auxiliary material is based on the use of such ingredients that would ensure the reliability, quality and environ-mental safety of the operation of transport pipelines. Keywords: pipe fittings, transport piping systems, auxiliary material, recipe, quality, reliability, environmen-tal safety.
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Grishin, M. V., Yu A. Rudkovsky, A. A. Bobin, and A. G. Bartsaikin. "DEVELOPMENT OF TECHNOLOGICAL EQUIPMENT FOR FLUID SUSCEPTIBILITY TESTS OF THE MATERIAL SPECIMENS IN COMPLIANCE WITH KT-160G." Izvestiya of Samara Scientific Center of the Russian Academy of Sciences 23, no. 6 (2021): 83–93. http://dx.doi.org/10.37313/1990-5378-2021-23-6-83-93.
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Garkina, Irina, and Alexander Danilov. "Analytical Methods for the Synthesis of Composites." Key Engineering Materials 847 (June 2020): 167–72. http://dx.doi.org/10.4028/www.scientific.net/kem.847.167.
Повний текст джерелаАнотація:
The evolution of ideas about materials is analyzed: the initial accumulation of data, experience and skills in the production of new material (the emergence of new technology); identification of patterns of influence of various factors on the properties of the material with the involvement of fundamental sciences (the formation of a new technology); obtaining building material with a given level of quality (development of an effective technology ); identification of the technological process and the construction of an adequate model of “recipe-technological factors - structure - quality of the material”. In models of structural material science, the existence of certain hierarchical structures of objects considered as systems is assumed; model selection is determined by the objectives of the structural description of the object at each scale level. The shift of paradigms based on the basic models of a continuous self-developing environment to the side of paradigms based on models of a structured self-developing environment based on the ideas and methods of a systematic approach and synergetics is indicated. The approaches to the fundamentalization of the synthesis of materials based on their own experience in designing materials for special purposes are presented: the presentation of the material in the form of a complex system (at first - poorly structured with conflicting goals and criteria); quality assessment of composite materials; formalization of kinetic processes; material quality management; minimization of dimension of criterion space; multi-criteria optimization.
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Medvedeva, O. N., and S. D. Perevalov. "Selection of Effective Thermal Insulation Materials for a Liquefied Natural Gas Tanks." Journal of Physics: Conference Series 2096, no. 1 (November 1, 2021): 012049. http://dx.doi.org/10.1088/1742-6596/2096/1/012049.
Повний текст джерелаАнотація:
Abstract The object of the research is an isothermal tank container for storage and transportation of liquefied natural gases, which requires special operating conditions and is related to a technological facility of increased danger. The purpose of the study is to substantiate the type and thickness of the insulating material to reduce the losses of liquefied natural gas during storage and transportation. Based on the results of the analysis, effective insulation materials were selected for use in cryogenic tanks for isothermal storage of LNG, the optimal thickness of the insulation material was determined, which provides the required level of losses for gas evaporation.
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Баснукаев, И. Ш., В. Х. Хадисов, З. М. Асхабова, and А. А. Исламов. "FUNDAMENTALS OF CONSTRUCTION TECHNOLOGY FOR BUILDINGS AND SPECIAL STRUCTURES." Вестник ГГНТУ. Технические науки, no. 3(21) (December 14, 2020): 33–38. http://dx.doi.org/10.34708/gstou.2020.92.23.005.
Повний текст джерелаАнотація:
Строительство - это отрасль материального производства, продуктом которой являются готовые к эксплуатации здания, сооружения и их комплексы. Ключевыми этапами строительного процесса являются инженерные изыскания, землеотвод, проектирование, согласование проектной документации, возведение здания или сооружения и дальнейший ввод его в эксплуатацию. Каждый из этих этапов представляет собой сложный технологический процесс, требующий комплексных знаний, специального оборудования и материалов. В рамках данной статьи рассматриваются основы технологий возведения зданий и специальных сооружений. Construction is a branch of material production, the product of which is ready-to-use buildings, structures and their complexes. The key stages of the construction process are engineering surveys, land acquisition, design, approval of project documentation, construction of a building or structure and its further commissioning. Each of these stages is a complex technological process that requires comprehensive knowledge, special equipment and materials. This article discusses the basics of technologies for the construction of buildings and special structures.
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Kholodov, Oleg, Lyudmila Usenko, and Marina Kholodova. "Budget support as a tool for innovative and technological development of agriculture in Russia." E3S Web of Conferences 273 (2021): 08078. http://dx.doi.org/10.1051/e3sconf/202127308078.
Повний текст джерелаАнотація:
The article is devoted to budget support as the main tool of innovative and technological development of agriculture in Russia within the framework of the State Program. Special attention is paid to the mechanism of subsidizing preferential investment loans aimed at modernizing the material and technical base of agricultural production. The assessment of the state of material and technical support of agricultural production in Russia in comparison with other countries of the world is given. The composition and structure of the limits of the resource provision of the departmental project “Stimulating investment activity in the agro-industrial complex” for 2017-2019 is analyzed. Special attention is paid to the mechanism of preferential investment lending. The dynamics of the purchase of agricultural machinery in the Russian Federation is presented, taking into account the new mechanism of state support that encourages the technical re-equipment of the industry. The rating of the leading credit and financial organizations of Russia participating in the implementation of the mechanism of preferential investment lending is presented. The composition and structure of concessional investment loans have been studied. The article describes the practice of updating the material and technical base of agriculture through Resolution No. 1432 and the system of JSC “Rosagroleasing”.
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Koryahin, V. M., and O. Z. Blavt. "ECHNOLOGICAL PROVISIONING OF TEST CONTROL OF SPECIAL HEALTH GROUP STUDENTS’ POWER ABILITIES." Physical education of students 20, no. 1 (February 28, 2016): 43–48. http://dx.doi.org/10.15561/20755279.2016.0106.
Повний текст джерелаАнотація:
Purpose: to substantiate and realize modern electronic technological means for perfection of test control of students’ power abilities in special health groups. Material: materials of students’ test control have been used in the research. Results: we have developed electronic system for test monitoring of students’ power abilities. Besides, we showed possibilities of innovative automated methodic application for test monitoring of students’ power abilities. Strict regulation of monitoring significantly decreases dispersion of error and raises reliability of test. The mentioned monitoring system removes dependence of result on teacher’s subjective perception of information. Conclusions: Implementation of the offered system of monitoring of students’ power abilities’ functional state ensures promptness of confident testing results’ reception. It will facilitate effectiveness of control in students’ physical education.
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Rico, J. C., S. Mateos, E. Cuesta, and C. M. Suárez. "Design of special tools by CAD/CAM systems." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 212, no. 5 (May 1, 1998): 357–71. http://dx.doi.org/10.1243/0954405981515969.
Повний текст джерелаАнотація:
This paper presents a program for the automatic design of special tools developed under a CAD/CAM (computer aided design/manufacture) system. In particular, the special tools made with standard components have been considered. Since the design of these types of tools was essentially related to the selection of their components, this paper deals with this aspect, insisting upon the selection of those components directly related to the removal of material: the toolholders or cartridges and the inserts. To select these components it is necessary to take into account not only geometrical or technological rules but also economical ones, owing to the high amount of possible components they can select. Consideration of economical aspects required the formulation of the cost equation associated with the use of these types of tools, characterized because their cutting edges coincide with different cutting velocities. Likewise, consideration of economical aspects allows the selection of the optimum cutting conditions and the cutting components to take place at the same time. Some of the geometrical and technological parameters related to the selection of cutting components are automatically identified by the system through an automatic identification of the workpiece profile.
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Chludzinski, Mariane, Rafael Eugenio dos Santos, Cristina Churiaque, Marta Ortega-Iguña, and Jose Maria Sánchez-Amaya. "Pulsed Laser Welding Applied to Metallic Materials—A Material Approach." Metals 11, no. 4 (April 14, 2021): 640. http://dx.doi.org/10.3390/met11040640.
Повний текст джерелаАнотація:
Joining metallic alloys can be an intricate task, being necessary to take into account the material characteristics and the application in order to select the appropriate welding process. Among the variety of welding methods, pulsed laser technology is being successfully used in the industrial sector due to its beneficial aspects, for which most of them are related to the energy involved. Since the laser beam is focused in a concentrated area, a narrow and precise weld bead is created, with a reduced heat affected zone. This characteristic stands out for thinner material applications. As a non-contact process, the technique delivers flexibility and precision with high joining quality. In this sense, the present review addresses the most representative investigations developed in this welding process. A summary of these technological achievements in metallic metals, including steel, titanium, aluminium, and superalloys, is reported. Special attention is paid to the microstructural formation in the weld zone. Particular emphasis is given to the mechanical behaviour of the joints reported in terms of microhardness and strength performance. The main purpose of this work was to provide an overview of the results obtained with pulsed laser welding technology in diverse materials, including similar and dissimilar joints. In addition, outlook and remarks are addressed regarding the process characteristics and the state of knowledge.
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Králik, Marian, and Vladimír Jerz. "Solving Selected Problems with Ultrasonic Surface Strengthening of Metal Components." Materials Science Forum 952 (April 2019): 22–28. http://dx.doi.org/10.4028/www.scientific.net/msf.952.22.
Повний текст джерелаАнотація:
The final machining and component forming operations have a considerable impact on final state of the surface layers in the machining process. These also include the technological operation of ultrasonic dynamic strengthening of the component surface layers. It is a specific surface-forming technology due to which the component properties can be effectively influenced, especially in their surface layers. Correct implementation of this technology can improve efficiency and extend the life span of both the produced components and the technical equipment. The article deals with the methods of special simulation of ultrasonic dynamic strengthening of metallic materials. Based on the results of the simulation, the technological parameters of the process of metallic material strengthening and ultrasonic concentrator design can be determined.
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SATŁAWSKI, Tomasz, and Wojciech Furmanek. "INVESTIGATIONS ON BALLISTIC METHOD APPLICATION FOR SELF-STRENGTHENING 35 MM GUN BARRELS." PROBLEMY TECHNIKI UZBROJENIA, no. 2 (October 9, 2017): 55–68. http://dx.doi.org/10.5604/01.3001.0010.5151.
Повний текст джерелаАнотація:
The paper includes an analysis of a concept for increasing the service life of 35 mm gun barrels by technological process of self-strengthening. A process of barrel self-strengthening that uses a ballistic method based on technological firings with special ammunition of increased propelling charge is considered. In effect of analytical - numerical studies it was stated that a self-strengthening effect is strictly limited to the cartridge chamber and has a local character i.e. the plastic deformation of barrel’s material includes not more than 30% of barrel wall thickness. The received results indicate that efficiency of self-strengthening provided by the ballistic method is low and in cases of deploying materials with high strength characteristics in barrels it could not bring any benefits at all.
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Alenichev, Viktor. "Geoinformational supporting of geotechnologies." E3S Web of Conferences 56 (2018): 01017. http://dx.doi.org/10.1051/e3sconf/20185601017.
Повний текст джерелаАнотація:
The use of complex geotechnical systems, helping for a comprehensive exploitation of mineral resources, is possible only in combination of physical and technical methods of the physical, chemical, biohydro-metallurgical and other special geological technologies of extraction of useful components from natural deposits and man-made formations. To substantiate the parameters of geotechnologies and of extraction indicators of the useful component, information is needed about the modes of processes in the rock mass characterized by certain properties. The creation of a geodatabase, including the characteristics of the material composition and technological properties of the mineral in various fields, will allow to form a database of technological knowledge for the selection of the method of extraction of minerals from the depths and enrichment schemes based on the classification of situations. The bank of technological knowledge should be formed as a multi-level structure that takes in account the physical phenomena and effects accompanying the extraction of a useful component from the depths, technological methods of mining, geotechnological methods and processes of raw material extraction, its processing and enrichment, modes of technological processes.
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Alekseeva, Y. A., T. A. Khoroshailo, A. A. Brichagina, and O. V. Svitenko. "Ecological and raw material aspects of the production of fermented milk drinks." IOP Conference Series: Earth and Environmental Science 981, no. 2 (February 1, 2022): 022082. http://dx.doi.org/10.1088/1755-1315/981/2/022082.
Повний текст джерелаАнотація:
Abstract Many works have been devoted to the problem of obtaining healthy drinks. The nutritional value of fermented milk products depends on the composition and properties of the feedstock, the quantitative and qualitative composition of the components included in the recipe, conditions and operating parameters at all stages of the technological process, as well as on the level of technological equipment of the enterprise. In Russia, over the past year, a total of 2.159.182 tons of fermented milk products were produced, of which 794.294 tons were yogurt, 194.177 tons were fermented baked milk and varenets, 16.004 tons were yogurt, and 907.453 tons were kefir. Kefir is a fermented milk product obtained from cow’s milk by fermentation with the use of special «fungi», which is a mixture of various microorganisms. It is eaten both separately and as part of a large number of culinary and confectionery dishes. It is popular in Russia, CIS, Europe, America and Australia.
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Monteiro, Waldemar Alfredo, S. J. Buso, A. Almeida Filho, and R. B. Ferrari. "Comparison of Microstructural Aspects by Electron Microscopy Observed in Al-Mg Based Alloys Obtained by Conventional and P/M Processes After Thermomechanical Treatments." Materials Science Forum 575-578 (April 2008): 1184–89. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.1184.
Повний текст джерелаАнотація:
Al-Mg based alloys have special attention due to the lightness of the material and certain mechanical properties and reciclability. Normally classified as non-heat-treatable these alloys obtain higher strength either by strain-hardening or by solid solution. The P/M process in the Al-Mg-Zr alloys in study leading to fine grain structure after the thermal treatment. The understanding of the observed phenomena depends of the fact that materials produced by powder metallurgy present complex interface reactions in a great amount of nucleation sites and a subtle change in the structure of the material causes an important variation in your properties. Alloys in study presented interesting values of properties, with evident technological potential.
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Mardari, Alexandru, and Sergiu Mazuru. "Simulation of the Pressing Process with Combined Forces by Using ABAQUS Software." Applied Mechanics and Materials 371 (August 2013): 158–62. http://dx.doi.org/10.4028/www.scientific.net/amm.371.158.
Повний текст джерелаАнотація:
Actual for machines building is it the problem of finding technological solutions to increase the quality of parts, increase productivity and save resources. Greater interest in it shows the materials that incorporate a range of mechanical proprieties. In this category it is joining metal powder as material, and parts thereof, which occupies a significant share in parts manufacturing having improved and special proprieties. The present work is carried out simulating metal powder pressing process by application of combined forces. To describe properties of metal powder was used Drucker-Prager cap model.
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Karaś, Rafał. "The technology of designing plastic windows and their transport from Poland since 1990." Polimery 66, no. 1 (January 20, 2021): 21–29. http://dx.doi.org/10.14314/polimery.2021.1.3.
Повний текст джерелаАнотація:
PVC window and door constructions are more and more popular in architecture. The profile manufacturing technology, structure and materials are constantly being modified. The Author analyses technological changes that have been implemented within the period of the last 20 years on the basis of Polish market experience, where the technology of PVC window and door production was hardly known, in relation to the largest producer and exporter of such products in the European Union at present. The Author also suggests that the area under investigation demands special care within material engineering, transport and ecology.
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Sun, Hongfeng, and Hongwei Luan. "Summary of SC TCM Agricultural Soil Ecological Restoration Major Scientific and Technological Innovation Engineering Technology." Research on World Agricultural Economy 1, no. 1 (October 21, 2020): 11. http://dx.doi.org/10.36956/rwae.v1i1.163.
Повний текст джерелаАнотація:
The paper focuses on the major scientific and technological innovation engineering technology of SC TCM agricultural land ecological restoration. The core technology system of SC TCM agricultural soil ecological restoration major scientific and technological innovation project consists of a number of cutting-edge advanced technologies from four aspects: “Century Tianwang” high-concentration nano-bio-organic fertilizer, high-concentration nano-bio-organic-inorganic slow-release compound fertilizer, “Century Tianwang” nano-soil special repair material; “Century Tianwang” botanical pesticide residue degradation agent; SOD rumex planting and breeding cycle technology.
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Fledrich, G. "Machining the Zirconium-dioxide engineering ceramics." International Journal Sustainable Construction & Design 1, no. 1 (November 6, 2010): 115–20. http://dx.doi.org/10.21825/scad.v1i1.20408.
Повний текст джерелаАнотація:
In place of brittle ceramics used so far have appeared up-to-date so called tough ceramicmaterials resisting better against mechanical effects [2]. Such material is the zirconium-dioxide, too.The important advantage of hard-turning is the applicability of universal tool. Various outlines can beformed by a tool given. Machining ceramics in case of using traditional machining (turning, milling,drilling) requires special technological conditions (tools, machine-tools, technological parameters, etc.)which are developing presently. We would like extending our research work in this course, too.
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Витязь, Петр, Petr Vityaz, Михаил Хейфец, Mikhail Kheyfets, С. Чижик, and S. Chizhik. "State and outlooks in development of technological complex of additive manufacturing composite parts." Science intensive technologies in mechanical engineering 2, no. 7 (July 20, 2017): 42–48. http://dx.doi.org/10.12737/article_595256f1e3d098.46148277.
Повний текст джерелаАнотація:
The analysis of automation and special-time integration of production systems is carried out. The analysis of the state and outlooks in the development of additive technologies of computer-aided production has shown a visible transition to a new paradigm of production – “Industry – 4.0”. The prospects of the application of material components and energy fluxes in the technologies of additive production are defined. Composites and products properties formation during the additive synthesis and also modular plants of additive production are considered.
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Kulikov, Mikhail Yurievich, Vitaliy Evgenevich Inozemtsev, Dmitry Aleksandrovich Nechaev, and Myo Naing Oo. "The Technological Conception of Quality Assurance in the Surface Treatment of Aluminum and Copper Alloys." Applied Mechanics and Materials 548-549 (April 2014): 331–35. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.331.
Повний текст джерелаАнотація:
The way is developed by the combined process of finishing machining. In this method, surface treatment is due to the combined effects of cutting tool and anodic dissolution of metal under the influence of an electric current in the electrolytic solution. Applying of this method allow the processing of aluminum and copper alloys to obtain higher quality parameters of the obtained surface, including special material.
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Umarov, Abdusalam, Dilnavoz Kamolova, and Makhmudjon Kurbonov. "Electron-paramagnetic resonance and infrared spectroscopic research of the structure of a southfield Polyvinylidene difluoride near the percolation threshold." E3S Web of Conferences 264 (2021): 05009. http://dx.doi.org/10.1051/e3sconf/202126405009.
Повний текст джерелаАнотація:
In this paper, the results of scientific research work are carried out to study the role of the interfacial layer in filled polymer materials using infrared and electron-paramagnetic resonance spectroscopy using the fundamentals of solid-state physics. At the same time, the authors of this work used all the rich experience of both experimenters and theoreticians working in this field of science and their own developments regarding methods for controlling the structure of these materials. It is noteworthy that the material interpreted in this work concerns composites subjected to special technological preparation, including the stage of ultrasonic dispersion of filler particles in a binder medium.
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Ryadnov, Alexey I., Olga A. Fedorova, and Angela K. Mamakhay. "Special Indicators of Integrated Efficiency Assessment of Using the Root Crops Cutter." Elektrotekhnologii i elektrooborudovanie v APK 48, no. 4 (December 2021): 45–50. http://dx.doi.org/10.22314/2658-4859-2021-68-4-45-50.
Повний текст джерелаАнотація:
Ensuring a stable feed base is one of the most important conditions for intensive livestock farming. Another necessary and obligatory condition is the use of modern methods of feed preparation with the use of highly efficient technical means. Evaluation of the effectiveness of the developed technical means should be carried out not by one indicator, but by a set of specific indicators combined into a complex criterion, taking into account the importance of all selected private indicators. (Research purpose) The research purpose is selecting the most important specific indicators for a comprehensive assessment of the effectiveness of the root crops cutter based on the analysis of scientific papers and the functioning of technical means used for the cutting of root crops for cattle feed. (Materials and methods) The methodological basis for the selection of indicators for a comprehensive effectiveness of the cutter was the effectiveness theory of the technical means. The initial material for determining the specific indicators of an efficiency assessment was their technical characteristics and quality indicators of the technological operation. (Results and discussion) Based on the analysis of research work and production experience, two key groups of indicators were identified for the effectiveness assessment of the cutter. They are the power for cutting – Nизм, labor costs per unit of cutted products – Зт, capacity of the cutter – Wч, operating time for failure – t0, time spent on the elimination of technological malfunctions – tтехнол, specific labor cost of maintenance tуд.ТО, level of juice loss Пс. It was proposed to determine the relative importance of each specific indicator by the method of expert evaluation. (Conclusions) Indicators for a comprehensive assessment of the efficiency of the use of root crop shredders are economic and quality. The economic indicators were attributed to the power costs for cutting root crops and labor costs during cutting; quality indicators include the productivity of the cutter per unit of time, operating time for failure, time spent on eliminating technological malfunctions, specific labor cost of the cutter maintenance and the level of juice losses.
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Flizikowski, Józef, Weronika Kruszelnicka, and Marek Macko. "The Development of Efficient Contaminated Polymer Materials Shredding in Recycling Processes." Polymers 13, no. 5 (February 26, 2021): 713. http://dx.doi.org/10.3390/polym13050713.
Повний текст джерелаАнотація:
Recently, a dynamic increase in the number of polymer elements ending their life cycle has been observed. There are three main ways of dealing with polymer waste: reuse in an unchanged form, recycling (both material and energy), and disposal (mainly in the form of landfilling or incineration). The legislation of European countries promotes in particular two forms of waste management: reuse and recycling. Recycling processes are used to recover materials and energy especially from contaminated waste, which are structurally changed by other materials, friction, temperature, machine, process, etc. The recycling of polymers, especially of multi-plastic structural elements, requires the use of special technological installations and a series of preparatory operations, including crushing and separating. Due to the universality and necessity of materials processing in recycling engineering, in particular size reduction, the aim of this study is to organize and systematize knowledge about shredding in the recycling process of end-of-life polymeric materials. This could help properly design these processes in the context of sustainable development and circular economy. Firstly, an overview of the possibilities of end-of-life plastics management was made, and the meaning of shredding in the end-of-life pathways was described. Then, the development of comminution in recycling processes was presented, with special emphasis given to quasi-cutting as the dominant mode of comminution of polymeric materials. The phenomenon of quasi-cutting, as well as factors related to the material, the operation of the shredding machine, and the technological process affecting it were described. Research conducted on quasi-cutting as a phenomenon when cutting single material samples and quasi-cutting as a machine process was characterized. Then, issues regarding recycling potentials in the context of shredding were systematized. Considerations included the areas of material, technical, energy, human, and control potentials. Presented bases and models can be used to support the innovation of creative activities, i.e., environmentally friendly actions, that produce specific positive environmental results in the mechanical processing of recycled and reused materials. The literature survey indicates the need to explore the environmental aspect of the shredding process in recycling and connect the shredding process variables with environmental consequences. This will help to design and control the processes to get the lowest possible environmental burdens.
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Hájková, Iveta, and Petr Novosad. "Modification of Technological Properties of Laboratory Premixes." Solid State Phenomena 276 (June 2018): 236–41. http://dx.doi.org/10.4028/www.scientific.net/ssp.276.236.
Повний текст джерелаАнотація:
Sulfur binders belong to the group of airbrushes. They can therefore only harden and harden in the air. The main raw material, gypsum, can be mined in several places in the world. Even in the Czech Republic there is a deposit of natural gypsum in Kobeřice u Opavy. [5] In spite of this fact, we use mostly industrially produced gypsies, because the natural gypsum deposit has only very limited capacity. The Energogypsum, produced in the Czech Republic by ČEZ Energetické Produkty s.r.o., is the waste product of flue gas desulphurization using the wet limestone scrubbing method. Like the chemosynthesis, it is characterized by its high purity (the content of pure CaSO4 2 H2O is at least 90%). The one in the Czech Republic is manufactured by Precheza, a.s. in Přerov. The use of sulphate binders is varied. A better form in the form of alpha plaster is used to produce self-leveling floors and dentistry. Less-quality beta gypsum has a larger application. From it we can produce both gypsum and monolithic partitions. We can also use it for the production of plasterboard and gypsum fiber boards and, last but not least, as internal plasters for its good fire performance. [1] Plasters are being prepared today in two different ways. Firstly, they are still prepared in the original outpatient way directly on the building from individual raw materials, but they are also industrially produced in the form of dry mortar mixtures, which are mixed on the building only with water. The second way is more progressive with the fact that nowadays it is even more widespread. For many builders, however, it remains financially scarce. That is why we have recently begun to find a compromise solution that will satisfy both the technical and the economic ones. This is the development of the so-called binder premixes, ie the industrially produced mixed binder, which is mixed only with sand and water on the site. The situation on our market shows that the recently developed special premix for lime-cement plaster and mortar mixtures is very positive for the building public and therefore the effort is to generalize this mixed mortar in the production raw material base and, in addition, to develop its analogue based on sulphate binder. [2]
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Monteiro, Waldemar Alfredo, S. J. Buso, and R. B. Ferrari. "Microstructural and Mechanical Studies in Al-Mg Based Alloys Obtained by Conventional and P/M Processes after Special Thermomechanical Treatments." Materials Science Forum 638-642 (January 2010): 3949–53. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.3949.
Повний текст джерелаАнотація:
Al-Mg based alloys have special attention due to the lightness of the material and certain mechanical properties and recyclability. Normally classified as non-heat-treatable these alloys obtain higher strength either by strain-hardening or by solid solution. The P/M process in the Al-Mg alloys in study leading to fine grain structure after the thermal treatment. The direct observation were made in a JEOL 200C and 2010 TEM combined with mechanical characterization utilizing Vickers microhardness measurements. The samples preparation followed the usual route of metallographic specimen preparation. The understanding of the observed phenomena depends of the fact that materials produced by powder metallurgy present complex interface reactions in a great amount of nucleation sites and a subtle change in the structure of the material causes an important variation in your properties. Alloys in study presented interesting values of properties, with evident technological potential.
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Jewiarz, Marcin, Marek Wróbel, Jarosław Frączek, Krzysztof Mudryk, and Krzysztof Dziedzic. "Digestate, ash and Trichoderm based fertilizer – production line concept design." MATEC Web of Conferences 168 (2018): 04004. http://dx.doi.org/10.1051/matecconf/201816804004.
Повний текст джерелаАнотація:
Paper presents design process of the prototype line, dedicated for production of fertilizer pellets from digestate-ash mixture. For enrichment of the nutritional characteristics of the final product additives were also used, like urea, elemental sulphur or phosphorite, and special fungal strains from Trichoderma spieces. During this process raw material will be dried (raw digestated), mixed, granulated and packed in one technological line. Presented concept, shows that there is possible to produce high quality fertilizer, from waste materials derrived form Green energy production, what should be one of very interesting ways to develop digestate and ash from biomass combustion.
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Zaitsev, Aleksandr, Oleg Kovalev та Elena Smirnova. "The Analysis of Influence of Characteristics of Radiation of CO2 and Fiber Lasers on the Form and Depth of the Destroyed Surface of а Metal". Siberian Journal of Physics 9, № 1 (1 березня 2014): 62–69. http://dx.doi.org/10.54362/1818-7919-2014-9-1-62-69.
Повний текст джерелаАнотація:
On the basis of model ideas of interaction of laser radiation with metals the results of theoretical and research of influence of radiation wave length with circular polarization of a laser beam on a form of a destroyed surface of stainless steel sheet at a variation of laser power and material thickness are presented. The special attention is paid to the comparative analysis of efficiency of destruction of metal at CO2 laser (with λ = 10.6мкм), and fiber laser (with λ = 1.07мкм), which widely now in use in technological complexes on laser cutting of various sheet materials
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Marin, Laurentiu, Topala Pavel, Catalina Daniela Marin, and Teodor Sandu. "Physical Training Methods For Mine Rescuers In 2015." ACTA Universitatis Cibiniensis 66, no. 1 (July 1, 2015): 108–13. http://dx.doi.org/10.1515/aucts-2015-0037.
Повний текст джерелаАнотація:
Abstract Research and development activities presented were aimed at obtaining a nanocomposite polyurethane matrix with special anti-wear, anti-slip and fire-resistant properties. Research and development works were materialized by obtaining polyurethane nanocomposite matrix, by its physico-chemical modification in order to give the desired technological properties and by characterization of the obtained material. Polyurethane nanocomposite matrix was obtained by reacting a PETOL 3 type polyetherpolyol (having a molecular weight of 5000 UAM) with a diisocyanate under well-established reaction conditions. Target specific technological properties were obtained by physical and chemical modification of polyurethane nanocomposite matrix. The final result was getting a pellicle material based on modified nanocomposite polyurethane, with anti-wear, anti-slip and fire-resistant properties, compatible with most substrates encountered in civil and industrial construction: wood, concrete, metal.
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Wilkońska, Kamila, Agata Biniek, Daniel Grochała, and Mirosław Pajor. "Impact of used semi-finished products on the cost of mass production of the part in the automotive industry." Mechanik 92, no. 10 (October 7, 2019): 667–69. http://dx.doi.org/10.17814/mechanik.2019.10.90.
Повний текст джерелаАнотація:
The article deals with the problem of determining production costs when designing part technology for the automotive industry. In mass-production and mass production, several variants of production processes are usually prepared, which are then assessed in economic and technological terms. Technological variants most often differ in the type of semi-finished product used, which significantly affects the efficiency and cost of machining carried out in subsequent operations. The article attempts to determine the methodology of determining costs for the developed technological variants. Simulation tests were carried out on production processes based on commercial semi-finished products and involving machining with high energy absorption, as well as processes based on special semi-finished products and using high-performance machining, characterized by low material consumption.
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Racz, Sever, Radu Breaz, Melania Tera, Claudia Gîrjob, Cristina Biriș, Anca Chicea, and Octavian Bologa. "Incremental Forming of Titanium Ti6Al4V Alloy for Cranioplasty Plates—Decision-Making Process and Technological Approaches." Metals 8, no. 8 (August 9, 2018): 626. http://dx.doi.org/10.3390/met8080626.
Повний текст джерелаАнотація:
Ti6Al4V titanium alloy is considered a biocompatible material, suitable to be used for manufacturing medical devices, particularly cranioplasty plates. Several methods for processing titanium alloys are reported in the literature, each one presenting both advantages and drawbacks. A decision-making method based upon AHP (analytic hierarchy process) was used in this paper for choosing the most recommended manufacturing process among some alternatives. The result of AHP indicated that single-point incremental forming (SPIF) at room temperature could be considered the best approach when manufacturing medical devices. However, Ti6Al4V titanium alloy is known as a low-plasticity material when subjected to plastic deformation at room temperature, so special measures had to be taken. The experimental results of processing parts from Ti6Al4V titanium alloy by means of SPIF and technological aspects are considered.