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Статті в журналах з теми "Antifriction composite"

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Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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1

Adamov, Anatoliy, Anna Kamenskih, and Yuriy Nosov. "MATHEMATICAL MODELING OF MODERN ANTIFRICTION POLYMERS BEHAVIOR." Applied Mathematics and Control Sciences, no. 4 (December 30, 2019): 43–56. http://dx.doi.org/10.15593/2499-9873/2019.4.03.

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Анотація:

An physicomechanical properties experimental study of the modern antifriction materials number was performed as part of the work. The 6 polymers and composites based on them having the greatest prospects for use as antifrictional coatings and interlayers in contact nodes are selected. The materials showed a nonlinear deformation behavior model in experimental study of samples. Therefore, the deformation theory of elastic-plasticity for the active loading case is chosen to describe the material behavior model in the framework of the first approximation. A numerical model of deformation of cylindrical samples under constrained compressionan experiment has been constructed. The optimal finite element mesh with a gradient decrease in the element size to the contact area of the cylindrical samples with the press plates has been selected. As part of the numerical experiments series, it was established: samples deformations from modern antifriction composite materials by 25–30 % more than other polymers considered, with one level of contact parameters; the modulus of the maximum contact tangential stress of all the materials examined is on average 25 times lower than the contact pressure.

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2

Kuzharov, Alexander S. "Polytetrafluoroethylene fiber-based composite antifriction coatings." Industrial & Engineering Chemistry Research 32, no. 5 (May 1993): 763–73. http://dx.doi.org/10.1021/ie00017a001.

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3

Abed-Negmatova, Nodira, Jakhongir Negmatov, Giyoz Gulyamov, Aziz Yuldashev, Sherzod Eminov, Shukhrat Bozorboev, Akida Aripova, Shukurullo Negmatov, and Dilshod Xojimuradov. "Composite Polymer Materials and the Details Made of them for Cotton Machines and Mechanisms." Advanced Materials Research 413 (December 2011): 535–38. http://dx.doi.org/10.4028/www.scientific.net/amr.413.535.

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We have done experimental researches of study of impact of different fillers on physical, mechanical and tribological properties and found the optimal substance of fillers, which provides with best properties of polypropylene composite materials. We suggested the principle of construction of antifriction and antifriction-wear resistant polypropylene composite materials, which have high strength and tribological properties and used in cotton machines and mechanisms.

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4

Yu, Zhang, Tang, and Gao. "Friction and Wear Behavior of Polyimide Composites Reinforced by Surface-Modified Poly-p-Phenylenebenzobisoxazole (PBO) Fibers in High Ambient Temperatures." Polymers 11, no. 11 (November 3, 2019): 1805. http://dx.doi.org/10.3390/polym11111805.

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Анотація:

(1) In order to improve the properties of antifriction and wear resistance of polyimide (PI) composite under high temperature conditions, (2) 3-Aminopropyltriethoxysilane (APTES) and Lanthanum (La) salt modifications were employed to manufacture poly-p-phenylenebenzobisoxazole (PBO)/PI composites with different interface properties. The representative ambient temperatures of 130 and 260 °C were chosen to study the friction and wear behavior of composites with different interface properties. (3) Results revealed that while both modification methods can improve the chemical activity of the surface of PBO fibers, the La salt modification is more effective. The friction coefficient of all composites decreases with the increase of sliding velocity and load at two temperatures, and the specific wear rate is increases. Contrary to the situation in the 130 °C environment, the wear resistance of the unmodified composite in the 260 °C environment is greatly affected by the sliding velocity and load, while the modified composites are less affected. Under the same test parameters, the PBO–La/PI composite has the lowest specific wear rate and friction coefficient, and (4) La salt modification is a more effective approach to improve the properties of antifriction and wear resistance of PI composite than APTES modification in high ambient temperatures.

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5

Xu, Xiao Feng, Wen Bin Yao, Jiu Hua Xu, Wei Zhang, Lin Yang, and Shi Wei Deng. "The Influences of the Plating’s Hardness, Abrasion and Antifriction Property Caused by the Adding of Nano- Al₂O₃ and PTFE." Advanced Materials Research 557-559 (July 2012): 1683–86. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.1683.

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Composite plating Ni-P-PTFE- nano- Al2O3was made by adding nano-scaled Al2O3and PTFE into chemical plating Ni-P alloy plating solution. The influences of the plating material’s hardness, abrasion and antifriction property caused by the additive amount of nano- Al2O3and PTFE were studied in the paper. The results indicate that the composite plating’s hardness, wear resistance and antifriction can be greatly improved by adding nano- Al2O3and PTFE into it.

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6

Tsai, Pei-Ying, Tzu-En Chen, and Yueh-Lien Lee. "Development and Characterization of Anticorrosion and Antifriction Properties for High Performance Polyurethane/Graphene Composite Coatings." Coatings 8, no. 7 (July 16, 2018): 250. http://dx.doi.org/10.3390/coatings8070250.

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This work contributes to the development and characterization of the corrosion resistance and antifriction properties of high performance polyurethane (PU)/graphene (Gr) composite coating. In this study, PU composite coatings containing 0, 2, 4 and 8 wt.% of Gr were prepared and evaluated using various corrosion and mechanical tests, namely electrochemical impedance spectroscopy, salt spray tests, cross-cut tape tests and dynamic mechanical analysis. Antifriction properties of the coatings were evaluated using a tribometer with a ball-on-disc mode at room temperature. The corrosion resistance and adhesion property of the PU coatings were found to be enhanced by adding 4 and 8 wt.% of Gr. The coefficient of friction revealed that the antifriction properties of the PU/Gr composite coatings were 61% lower than those of the conventional coating when the Gr content was increased to 8 wt.%.

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7

Hong, Q., G. Yao, and S. Chen. "Development of Iron Matrix Antifriction Composite Coatings." Metal Finishing 96, no. 10 (October 1998): 16–19. http://dx.doi.org/10.1016/s0026-0576(98)80003-2.

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8

Kurzawa, Adam, Tetiana Roik, Oleg Gavrysh, Iuliia Vitsiuk, Miroslaw Bocian, Dariusz Pyka, Pawel Zajac, and Krzysztof Jamroziak. "Friction Mechanism Features of the Nickel-Based Composite Antifriction Materials at High Temperatures." Coatings 10, no. 5 (May 7, 2020): 454. http://dx.doi.org/10.3390/coatings10050454.

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The friction behavior of the formed antifriction films and their effect on the functional properties of the composite based on the powder nickel alloy EI929 with solid lubricant CaF2 at high temperatures was investigated. An antifriction film was formed on the contact surfaces during the friction process. Such a film was the result of the interaction of the contact surfaces with atmospheric oxygen at high temperatures. It contains oxides of alloying elements from materials of the frictional contact and solid lubricant calcium fluoride. The quantitative ratio of formed oxides depends on the temperature operating conditions of material. The data of thermodynamic simulation of the high-temperature interaction of the composite with oxygen coincide with the experimental data obtained by studying the fine structure of surface antifriction films. Antifriction films consist of oxide phases in combination with solid CaF2 lubricant. Anti-friction films provide high wear resistance of the self-lubricating composite in the range of temperatures 1073–1173 K due to the balance between the rate of their formation and wear. When the temperature exceeds 1200 K, the film loses its lubricating properties and acts as an abrasive substance due to the intense oxidation. Abrasive surfaces of materials were subjected also to microscopic examination, in which the mechanically mixed layer (MML) was described. The study of the friction surface roughness parameters confirmed the presence of the formed friction self-lubricating film and allowed to determine its parameters. The friction mechanism was the formation of an oxide layer combined with a solid lubricant, which provides high antifriction properties in the range of 1073–1273 K.

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9

Gorshenkov, Mikhail V., Sergey D. Kaloshkin, Victor V. Tcherdyntsev, Vladimir D. Danilov, and Victor N. Gulbin. "Fabrication and Microstructure of Al-Based Hybrid Composite Reinforced by B₄C and Ultra-Dispersed Tungsten." Defect and Diffusion Forum 309-310 (March 2011): 249–54. http://dx.doi.org/10.4028/www.scientific.net/ddf.309-310.249.

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Al-based hybrid composite reinforced by ultra-dispersed tungsten and B4C, was produced by mechanical alloying and hot extrusion. Structure of obtained composites was studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The compressive and tensile properties of these materials were investigated. Tribological tests showed high antifriction properties and wear resistance of composite containing B4C and tungsten. The dilatometric measurements showed that thermal expansion coefficient remains approximately constant up to 500 °C.

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10

Adamenko, N. A., G. V. Agafonova, D. V. Savin, A. I. Bogdanov, D. A. An, and A. V. Kazurov. "RESEARCH OF THE CRYSTALLINE STRUCTURE OF POLYMERIC COMPOSITE MIXTURES AFTER EXPLOSIVE PRESSING." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 4(239) (April 22, 2020): 23–27. http://dx.doi.org/10.35211/1990-5297-2020-4-239-23-27.

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The method of X-ray diffraction analysis was used to study polymer composites based on thermoplastic polymers of ultra-high molecular weight polyethylene UHMWPE with β-sialon and polytetrafluoroethylene PTFE with aluminum oxide Al2O3 after static and explosive pressing. The studies were carried out with the aim of developing explosive pressing technology for polymer composite materials with enhanced strength and antifriction properties.

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11

Roik, Tetiana, Ahmad Rashedi, Taslima Khanam, Abhay Chaubey, Gurusami Balaganesan, and Sadaqat Ali. "Structure and Properties of New Antifriction Composites Based on Tool Steel Grinding Waste." Sustainability 13, no. 16 (August 6, 2021): 8823. http://dx.doi.org/10.3390/su13168823.

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This article investigates the impact of manufacturing technology on the structure, mechanical, and tribological properties of new antifriction composite materials based on R6M5 high-speed tool steel grinding waste. The characteristics of the new composite’s structure formation and its impact on properties after use of the established technological modes, including grinding waste regeneration, were illustrated. It was demonstrated that such technology is capable of ensuring microheterogeneous structure. The material’s structure consists of the metal matrix based on R6M5 high-speed tool steel waste and uniformly distributed CaF2 solid lubricant in the steel matrix. As compared to known iron-based composites, this structure promotes a high degree of mechanical and tribological properties. During tribological tests, anti-seize thin films of 15–20 μm are formed on the contacting surfaces. These constantly renewable films contribute to the high antifriction properties of the composite under the studied friction conditions and provide a self-lubricating effect. Such films fully cover both the material’s surface and the counterface. The formation of antifriction films results in the self-lubrication mode. The findings of the study open up the possibility of predicting the friction behavior of a composite at high temperatures by selecting the initial metal grinding waste to ensure the appropriate level of properties. The extensive use of various alloy steel-based industrial grinding waste in the re-production cycle would significantly contribute to resolving the global environmental problem of protecting the environment from pollution.

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12

Abed, Nodira, Оlim Eshkobilov, Giyas Gulyamov, and Malokhat Tuhtasheva. "Engineering composite materials for the cotton processing industry." E3S Web of Conferences 264 (2021): 05053. http://dx.doi.org/10.1051/e3sconf/202126405053.

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Experimental studies have been carried out to study the effect of various fillers on the physicomechanical and tribotechnical properties of the compositions, and the optimal filler contents have been established, which ensure the best properties of polyethylene, polypropylene, polystyrol and polyamide structural composite materials. The principle of design of shock-resistant, antifriction and antifriction-wear-resistant polyethylene, polypropylene, polystyrol and polyamide structural composite materials is proposed. Highly efficient structural composite materials for functional purposes have been developed on the basis of thermoplastic polymers and fillers of various structures and natures, which have sufficiently high strength and tribotechnical characteristics and have found application in the working bodies of cotton machines and mechanisms of the cotton processing industry operating under conditions of friction and wear.

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13

Pilyushina, G. A., P. G. Pyrikov, E. A. Pamfilov, A. Ya Danilyuk, and V. V. Kapustin. "Modifying Wood for Creation Plain Bearings of Timber Machines." Lesnoy Zhurnal (Forestry Journal), no. 5 (November 5, 2020): 155–65. http://dx.doi.org/10.37482/0536-1036-2020-5-155-165.

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Анотація:

The use of modified wood in different friction pairs of timber machines and processing equipment is largely due to its high wear resistance, low coefficient of friction and good dissipative characteristics. The positive properties of composite materials are achieved by using technologies of volumetric modification and implantation of antifriction and heatconducting elements, as well as by forming a composite of crushed wood with the addition of modifying additives and three-dimensional reinforcement. The expansion of the scope of using composite materials in the designs of units with sliding friction pairs necessitates carrying out research on their performance and formation conditions for high level tribotechnical parameters: wear resistance, antifriction, heat resistance, etc. Lack of information on the effect from the factors providing the functional characteristics of wood-based materials including thermal conductivity and vibration absorption significantly complicates the problem analysis in design and technology when developing and producing bearing joints. Therefore, the purpose of this work was studying the conditions of contact interaction of plain bearings made of wood-metal composite materials, allowing for rheological effects, and developing the ways of control their tribotechnical parameters by changing the structure, composition and phase filler. Models of bearings of different types, which allow creating a regulated stress-strain state in sleeves and liners, were developed for these purposes. Research of the bearings performance made it possible to find vibration-damping properties when using suspended crushed fractions in the composite. Increased antifriction properties are achieved in the process of wood modification with electrolytic copper, while the manufacturability of a bearing sleeve is achieved when the support is formed directly at the installation site. Unlike most of the used antifriction materials, the bushings wood maintains the stability of structure in conditions of volumetric compression at negative and positive temperatures, and the wear processes occurring on the contact surfaces of wood-metal bearings are followed by the compaction of the sleeve material. The subsequent destruction is predominantly of fatigue nature, initiated by the dynamics of vibrations and disturbances of the system; therefore, an important part of further research is the assessment of the relaxation ability of wood-metal composites under shock-vibration loading with optimization of their composition according to this criterion.

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14

Пилюшина, Галина, Galina Pilyushina, Евгений Памфилов, Evgeniy Pamfilov, Елена Шевелева, and Elena Sheveleva. "REINFORCED COMPOSITE SLIDING BEARINGS." Bulletin of Bryansk state technical university 2019, no. 6 (June 27, 2019): 56–64. http://dx.doi.org/10.30987/article_5d10851f9915c2.59892204.

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Анотація:

The aim of the work is a design substantiation of sliding bearings with wedges made of new antifriction reinforced wood-metal materials having increased tribo-technical properties ensuring potentialities for their industrial use widening. The wear investigation of the materials offered was carried out according to the procedure providing for an abrasive impact at that besides wear-resistance the thermo-physical characteristics of samples under analysis were assessed. As a result of the investigation there was offered a structure of anti-friction materials combining in them modified wood and a metal filling agent made of different antifriction materials or special capsules filled with fusible materials and also wedges made by means of a joint coiling of a metal band or an element as tensile anti-friction springs and sized bands of veneer. The offered reinforced composite sliding bearings allow ensuring higher mechanical and tribo-technical characteristics to a considerable extent, optimizing a thermal working mode of sliding bearing wedges, increasing considerably their manufacturability and widening a sphere of industrial use by means of rational combining different wood types and metal composite constituents.

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15

Belyak, O. A., and T. V. Suvorova. "Predicting the Mechanical Properties of Antifriction Composite Materials." Mechanics of Composite Materials 57, no. 5 (November 2021): 647–56. http://dx.doi.org/10.1007/s11029-021-09986-7.

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16

Olifirov, Leonid K., Andrey A. Stepashkin, Galal Sherif, and Victor V. Tcherdyntsev. "Tribological, Mechanical and Thermal Properties of Fluorinated Ethylene Propylene Filled with Al-Cu-Cr Quasicrystals, Polytetrafluoroethylene, Synthetic Graphite and Carbon Black." Polymers 13, no. 5 (March 4, 2021): 781. http://dx.doi.org/10.3390/polym13050781.

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Antifriction hybrid fluorinated ethylene propylene-based composites filled with quasicrystalline Al73Cu11Cr16 powder, polytetrafluoroethylene, synthetic graphite and carbon black were elaborated and investigated. Composite samples were formed by high-energy ball milling of initial powders mixture with subsequent consolidation by injection molding. Thermal, mechanical, and tribological properties of the obtained composites were studied. It was found that composite containing 5 wt.% of Al73Cu11Cr16 quasicrystals and 2 wt.% of nanosized polytetrafluoroethylene has 50 times better wear resistance and a 1.5 times lower coefficient of dry friction comparing with unfilled fluorinated ethylene propylene. Addition of 15 wt.% of synthetic graphite to the above mentioned composition allows to achieve an increase in thermal conductivity in 2.5 times comparing with unfilled fluorinated ethylene propylene, at that this composite kept excellent tribological properties.

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17

Alisin, V. V. "Improving the antifriction properties of the housing-rotor coupling in axial turbomachines." Journal of Physics: Conference Series 2094, no. 4 (November 1, 2021): 042039. http://dx.doi.org/10.1088/1742-6596/2094/4/042039.

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Abstract The article discusses the frictional interaction of carbon-carbon composite material on steel. Antifriction properties and wear resistance of the material under dry friction at speeds up to 100 m/s are investigated. The effect of velocity and contact pressure on the friction coefficient and wear resistance of a carbon composite is analyzed. The regularities of the change in the coefficient of friction are determined depending on the load-speed factors. The assumption is substantiated that the high thermal stability of the carbon composite, its low hardness, good antifriction properties and high wear resistance allow the material to be used in friction units operating at very high speeds and temperatures. In order to improve the reliability and reduce gas flows in axial turbomachines, on the basis of the study carried out, it is recommended that instead of heat-resistant coatings, a lining of the gas duct casing should be made of carbon composite.

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18

Roik, Tetiana, Oleg Gavrysh, Ahmad Rashedi, Taslima Khanam, Ali Raza, and Byongug Jeong. "New Antifriction Composites for Printing Machines Based on Tool Steel Grinding Waste." Sustainability 14, no. 5 (February 27, 2022): 2799. http://dx.doi.org/10.3390/su14052799.

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In this article, we present research results on the structure and properties of new self-lubricating antifriction composites based on 4H4VMFS tool steel grinding waste with solid lubricant additives. The new composites are designed to work in the friction units of offset cylinders in printing machines at rotation speeds up to 7000 rpm and increased loads up to 5.0 MPa. The developed technology formed composites with a fine-grained heterophase structure with a metal matrix base of tool steel 4H4VMFS regenerated grinding waste, consisting of high-alloy α−solid solution and hard grains of alloying element carbides, as well as evenly distributed CaF2 antiseizure solid lubricant. This structure ensured the formation of composites with favorable functional properties. During the friction process, antiseizure films were formed on the contact surfaces, resulting in a self-lubrication mode. Comparative tests for friction and wear showed significant advantages of the new waste composite compared to cast bronze parts, which are traditionally used in the friction units of offset cylinders of rolled newspaper printing machines. The stable operation of the new composite made it possible to ensure a “wear-free” effect. Studies have shown the importance and prospects of using the wide range of valuable grinding waste in the reproduction cycle to manufacture quality composites. Reuse of such waste would significantly protect the environment from pollution connected with human activity industrial and mitigate negative impacts on ecosystems and the biosphere.

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19

Radaykina, Elena A., and Aleksandr V. Kotin. "REPAIR OF POWER HYDRAULIC CYLINDERS USING NEW POLYMER COMPOSITE MATERIALS." Tekhnicheskiy servis mashin 3, no. 144 (September 2021): 138–45. http://dx.doi.org/10.22314/2618-8287-2021-59-3-138-145.

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The development and implementation of a new repair technology based on the use of polymer parts made of high-performance antifriction composites in tribo-couplings of power hydraulic cylinders will reduce the cost and repair time, significantly increase the reliability of the entire hydraulic system. (Research purpose) The research purpose is in increasing the efficiency of repairing of power hydraulic cylinders of agricultural machinery by restoring tribo-conjugations with new antifriction composites based on modified caprolon. (Materials and methods) The article presents the study of the physical and mechanical characteristics of samples of polymer composites according to well- known and original methods. Authors used computer programs and original methods of equipment suppliers in the study of compounding processes, rheological and tribotechnical tests. Theoretical research using the provisions of theoretical mechanics, elasticity theory and thermophysics has been conducted. A numerical study of the introduction of a spherical indenter into a sample of a viscoelastic composite material was carried out using the ANSYS software package, the MAPDL module. (Results and discussion) The article analyzes the obtained data on the elastic-strength, rheological and tribotechnical characteristics of the studied compositions of polyamide composites. The three-component composite containing 2 percent shungite, 0.5 percent graphite, 6 surfactants has the best complex of these properties. It has been proposed to restore the operability of the piston assembly and the front cover during the repair of the power hydraulic cylinder to change their design with the installation of guide support rings made of polyamide composite into the cover and piston of the hydraulic cylinders. This will lead to a significant reduction in the wear rate of the tribo-coupling parts and reduce the complexity of repairing hydraulic cylinders. (Conclusions) Restoration of tribo-couplings of power hydraulic cylinders with the installation of a guide ring made of a new polymer composite ensures a decrease in the maximum contact stresses, the rate of their increase with an increase in the gap and, as a result, a decrease in the wear rate of the contacted parts.

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20

Rusin, Nikolay M., Alexander L. Skorentsev, Maksim G. Krinitcyn, and Andrey I. Dmitriev. "Tribotechnical Properties of Sintered Antifriction Aluminum-Based Composite under Dry Friction against Steel." Materials 15, no. 1 (December 27, 2021): 180. http://dx.doi.org/10.3390/ma15010180.

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The disadvantage of antifriction Al–Sn alloys with high tin content is their low bearing capacity. To improve this property, the aluminum matrix of the alloys was alloyed with zinc. The powder of Al–10Zn alloy was blended with the powder of pure tin in the proportion of 40/60 (wt.%). The resulting mixture of the powders was compacted in briquettes and sintered in a vacuum furnace. The sintered briquettes were subjected to subsequent pressing in the closed press mold at an elevated temperature. After this processing, the yield strength of the sintered (Al–10Zn)–40Sn composite was 1.6 times higher than that of the two-phase Al–40Sn one. The tribological tests of the composites were carried out according to the pin-on-disk scheme without lubrication at pressures of 1–5 MPa. It was established that the (Al–10Zn)–40Sn composite has higher wear resistance compared with the Al–40Sn one. However, this advantage becomes insignificant with an increase in the pressure. It was found that the main wear mechanism of the investigated composites under the dry friction process is a delamination of their highly deformed matrix grains.

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21

Mikheev, R. S., N. V. Kobernik, I. E. Kalashnikov, L. K. Bolotova, and L. I. Kobeleva. "Tribotechnical properties of antifriction coatings based on composite materials." Inorganic Materials: Applied Research 6, no. 5 (September 2015): 493–97. http://dx.doi.org/10.1134/s2075113315050111.

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22

Shevchuk, Yu F., T. A. Roik, and V. T. Varchenko. "Antifriction composite materials for friction joints of centrifugal equipment." Powder Metallurgy and Metal Ceramics 46, no. 7-8 (July 2007): 404–7. http://dx.doi.org/10.1007/s11106-007-0063-z.

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23

Babets, N. V., B. N. Vasil’ev, and M. A. Ismailov. "Improvement of iron-based composite powder material antifriction properties." Metallurgist 56, no. 5-6 (September 2012): 462–65. http://dx.doi.org/10.1007/s11015-012-9598-4.

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24

Shcherbakov, I. N. "Composite antifriction coating modified with copper complex and fluoropolymer." IOP Conference Series: Materials Science and Engineering 1029 (January 19, 2021): 012028. http://dx.doi.org/10.1088/1757-899x/1029/1/012028.

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25

Shcherbakov, Igor N. "Analysis of Phase Composition and Properties of Composite Nickel-Phosphoric Coatings Using Wear-Resistant and Antifriction Modifying Agents." Materials Science Forum 1037 (July 6, 2021): 423–28. http://dx.doi.org/10.4028/www.scientific.net/msf.1037.423.

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Анотація:

The possibility of introduction of antifriction and wear-resistant modifying agents into the matrix of a composite nickel-phosphorus coating to obtain effective composite coatings, is considered. The analysis of the possible influence of modifying additives in the form of ultrafine powders on the tribological properties of the developed coatings, is carried out.

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26

Sima, Gabriela, Mihail Mangra, Oana Gîngu, Marius Catalin Criveanu, and Bebe Adrian Olei. "Influence of the Reinforcing Elements on the Wear Behavior of Al/(Sic+Graphite) Composites Elaborated by Spark Plasma Sintering Technology." Materials Science Forum 672 (January 2011): 241–44. http://dx.doi.org/10.4028/www.scientific.net/msf.672.241.

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The paper presents the experimental results regarding the influence of the reinforcing elements on the wear behavior of Al-matrix composites discontinuously reinforced by SiC and Graphite. This antifriction composite material is processed by Reactive Mechanically Alloyed and then by Spark Plasma Sintering technology. In order to optimize the processing technology, especially the sintering parameters, the Spark Plasma Sintering process was applied because of its advantageous aspects: lower sintering temperatures, shorter sintering time and higher properties values of the sintered material vs. the corresponding ones obtained by the classical sintering route. The authors realized a comparative analysis on the wear behavior of the researched composite materials.

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27

Bychkovskiy, Vladimir S., Nikolay G. Filippenko, Aleksandr V. Livshits, Denis V. Bakanin, and Emil’ F. Farzaliev. "Automated Method for Controlling Oil Filling of Polymer and Composite Materials." Elektrotekhnologii i elektrooborudovanie v APK 48, no. 4 (December 2021): 9–16. http://dx.doi.org/10.22314/2658-4859-2021-68-4-9-16.

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For the modernization of polymer and composite materials in order to increase their operational properties, namely strength and wear resistance, there are created oil-filled polymer and composite materials. Filling the manufactured part with oil is problematic in the automating the control of the filled state. The filling process is applicable for polymer or composite bearing separators of agricultural machines (forage harvesters, cotton harvesters, grape harvesters and others) in order to increase their service life in conditions of a large amount of dust and dirt, as well as in cases of dry start. (Research purpose) The research purpose is in developing a methodology for automated filling control of structural polymers and composites used in agricultural machinery with antifriction materials. (Materials and methods) The article presents designed and produced experimental installation and field tests. The developed sensor placement scheme allows performing experimental studies on measuring the volumetric body temperature of a polymer or composite sample during the impregnation process online. The differentiation of the obtained results, presented in graphical form, makes it possible to quickly analyze the dynamics of temperature changes in the thickness of the material. (Results and discussion) The article presents the optimal proportion of a mixture of hexane and M-8B engine oil and the most favorable temperature conditions. It was confirmed the possibility of using this technique in the technology of oil filling of antifriction products made of polymer and composite materials. (Conclusions) The technique makes it possible to identify the filled state of manufactured polymer or composite parts used in friction units of agricultural machines without the introduction of thermal sensors. The control is carried out according to the previously obtained values of the speed and time of impregnation to a given depth of penetration of the oil filler, depending on the type of material.

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28

Filippenko, N. V., V. S. Bychkovsky, D. V. Bakanin, A. V. Livshits, and T. T. Chumbadze. "Automated control of the production process of antifriction polymer materials." Journal of Physics: Conference Series 2094, no. 5 (November 1, 2021): 052072. http://dx.doi.org/10.1088/1742-6596/2094/5/052072.

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Abstract This paper presents a technique of controlling the process of oil filling of polymer and composite materials, which allows automated determination of volumetric heating of a polymer or composite sample for the purpose of drying. The differentiation of the obtained results, presented in graphical form, made it possible to quickly analyze the dynamics of temperature changes in the thickness of the material, the change of which determines the rates and time of impregnation to a certain depth of the body of the polymer or composite sample in figure 1. According to the developed methodology, studies of the impregnation of the oil filler of a mixture of M8-B motor oil and hexane were carried out. For each experiment, time dependences of the impregnation rate were obtained. Based on the work carried out, the optimal proportion of a mixture of hexane and engine oil and the most favourable temperature conditions were determined. At the end of the research, the assumption about the possibility of using this technique for the purpose of its industrial use in the technology of oil filling of antifriction products made of polymer and composite materials was confirmed.

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29

Kalashnikov, I. E., L. K. Bolotova, L. I. Kobeleva, P. A. Bykov, A. G. Kolmakov, and R. S. Mikheev. "Antifriction composite material based on alloy of Al-Sn system." Physics and Chemistry of Materials Treatment, no. 2 (2020): 65–71. http://dx.doi.org/10.30791/0015-3214-2020-2-65-71.

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30

Kalashnikov, I. E., L. K. Bolotova, L. I. Kobeleva, P. A. Bykov, A. G. Kolmakov, and R. S. Mikheev. "Antifriction Composite Material Based on Alloy of Al–Sn System." Inorganic Materials: Applied Research 12, no. 3 (May 2021): 750–54. http://dx.doi.org/10.1134/s2075113321030151.

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31

Wang, Zhigang, Jun Li, and Daquan Li. "Analysis of tribological properties of graphite and aluminum composite materials prepared by powder metallurgy technique." Materials Express 10, no. 5 (May 1, 2020): 663–70. http://dx.doi.org/10.1166/mex.2020.1692.

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Анотація:

In order to make full use of the wear resistance and antifriction of the mixed reinforced particles, improve the performance and utilization rate of the composite material, and reduce its wear amount, in this study, graphite and aluminum composite materials with different graphite concentration were prepared by powder metallurgy process. On this basis, the influence of different graphite concentration on the friction coefficient and wear amount of composite samples and different load on the wear amount of composite materials were discussed and analyzed. The results show that with the increase of graphite content, the friction coefficient and wear amount of the composite will decrease correspondingly. When the load is less than 30 N, the wear curve of the sample changes steadily. When the load is more than 30 N, the wear will increase sharply. Therefore, the analysis of the tribological properties of the graphite and aluminum composites based on the powder metallurgy process plays an important role in improving the utilization rate of the composite and reducing its wear.

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32

Зернин, Михаил, Mikhail Zernin, Николай Рыбкин, and Nikolay Rybkin. "INFLUENCE OF RADIAL COMPLIANCE OF SURFACES UPON HYDRODYNAMICS PARAMETERS OF CYLINDRICAL SLIDING BEARINGS." Bulletin of Bryansk state technical university 2016, no. 4 (December 28, 2016): 46–56. http://dx.doi.org/10.12737/23162.

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The procedure and results of calculated researches of hydrodynamics parameters in cylindrical sliding bearings taking into account radial compliance of surfaces are shown. The radial compliance of bearing structural elements is taken into account on the basis of the hypothesis of Winkler’s reason. The examples of hydrodynamics computations of a particular bearing at manufacturing an antifriction layer of metal or composite material with a polymeric matrix are shown. At the same time a modulus of elasticity of an antifriction layer was being changed from 2.43 to 63 MΠa, a total rate of radial compliance was changing from 0 to 40.6•10-14m3/H. The analysis of radial compliance influence upon a minimum thickness of an oil layer and maximum pressure in it is carried out

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33

Adamenko, N., G. Agafonova, A. Kazurov, and D. Savin. "RESEARCH OF STRUCTURAL CHANGES IN EXPLOSIVE PRESSING OF POLYMERIC COMPOSITE BLENDS." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 2(237) (February 20, 2020): 37–42. http://dx.doi.org/10.35211/1990-5297-2020-2-237-37-42.

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The method of X-ray diffraction analysis was used to study polymer composite materials with a hybrid matrix in the form of blends of thermoplastic polymers of polytetrafluoroethylene PTFE with rigid high-temperature resistant polyarylate PA filled with molybdenum disulfide after explosive pressing with a pressure of 0.9-4.6 GPa. The studies were carried out with the aim of developing the technology of explosive pressing of polymer composite materials with a hybrid matrix, filled with molybdenum disulfide, with increased strength and antifriction properties.

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34

Zhan, Y. Z., X. B. Shi, and H. F. Xie. "Microstructural investigation on antifriction characteristics of self-lubricating copper hybrid composite." Materials Science and Technology 22, no. 3 (March 2006): 368–74. http://dx.doi.org/10.1179/026708306x81450.

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35

Kolmakov, A. G., I. E. Kalashnikov, L. K. Bolotova, N. B. Podymova, P. A. Bykov, I. V. Katin, and L. I. Kobeleva. "Study of Characteristics of Composite Materials Based on B83 Antifriction Alloy." Inorganic Materials 56, no. 15 (December 2020): 1499–505. http://dx.doi.org/10.1134/s002016852015008x.

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36

Il'ina, Z. T., A. V. Nenakhov, and A. A. Litvinets. "Peculiarities of the thermal expansion of composite antifriction-type fluoroplastic materials." Soviet Powder Metallurgy and Metal Ceramics 31, no. 11 (November 1992): 983–86. http://dx.doi.org/10.1007/bf00797632.

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37

Wang, Hao, Xuan Xie, Xijun Hua, Sheng Xu, Bifeng Yin, and Baijing Qiu. "Analysis of the lubrication process with composition of solid lubricants of laser-modified sliding surfaces." Advances in Mechanical Engineering 12, no. 4 (April 2020): 168781402091607. http://dx.doi.org/10.1177/1687814020916078.

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Solid lubricants have been applied diffusely in numerous domains. This article investigates the impacts of each component in composite solid lubricants on the tribological performance and compares the antifriction effects of different kinds of solid lubricants to solve the lubrication problem of sliding bearing. Surface textures with dimples were fabricated on the surfaces of GCr15 bearing steel by a Q-switched solid-state Nd:YAG laser. The composite solid lubricants were filled in the micro-dimples by the deposition processes of heat-maintaining and pressure-maintaining, consisting of blinding elements and lubricating elements. Tribological performances under sliding friction for different kinds of adhesives and lubricants with different grain sizes were evaluated by ring-on-disk tribometer. On this basis, an orthogonal experiment of four factors and three levels (34) was designed to investigate the impacts of different components of the solid lubricants on the tribological performance. Solid lubricants with nanoparticles can enhance antifriction ability: the friction coefficient of nano-graphite is 18.9% lower than that of micron-graphite, and the friction coefficient of nano-sized molybdenum disulfide declines 7.6% comparing to that of micron-sized molybdenum disulfide. According to the results of the orthogonal experiment, the optimal formula of the composite solid lubricants was graphite:molybdenum disulfide:polyimide:carbon nano-tubes = 4:1:0.5:0.4.

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38

Bychkov, Аndrii, and Оlha Nechyporenko. "Composite metal-ceramic and metal-polymeric materials for friction assemblies of national civil aircrafts." Aerospace Research in Bulgaria 30 (2018): 143–54. http://dx.doi.org/10.3897/arb.v30.e12.

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Анотація:

Experience of using of metal-ceramic and a metal-polymeric material in friction assemblies of aeronautical engineering is generalized. Characteristics and conditions of operation of the sintered friction and antifriction materials are presented. Peculiarities of metal-fluoroplastic tapes of foreign production are considered. Efficiency of using of sintered and metal-polymeric materials in friction assemblies of modern civil aircrafts is shown.

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39

Olaleye, Kayode, Tetiana Roik, Adam Kurzawa, Oleg Gavrysh, Iulia Vitsiuk, and Krzysztof Jamroziak. "Structure Formation in Antifriction Composites with a Nickel Matrix and Its Effect on Properties." Materials 15, no. 9 (May 9, 2022): 3404. http://dx.doi.org/10.3390/ma15093404.

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Анотація:

The paper is devoted to studying the chemical elements distribution in the material’s structure depending on the manufacturing technological parameters and their effect on properties of a new self-lubricating antifriction composite based on powder nickel alloy EP975 with CaF2 solid lubricant for operation at temperature 800 °C and loads up to 5.0 MPa, in air. The study is focused on the features of alloying elements distribution in the composite matrix, which depends on the manufacturing technology. A uniform distribution of all alloying elements in the studied composite was shown. The chemical elements’ uniform distribution in the material is associated with one of the most important preparatory technological operations in the general manufacturing technology used. This is a technological operation of mixing powders with subsequent analysis of the finished mixture. The uniform distribution of chemical elements determines the uniform arrangement of carbides and intermetallics in the composite. General manufacturing technology, which includes the main operations, such as hot isostatic pressing technology and hardening heat treatment, contributed to the obtainment of a practically isotropic composite with almost the same properties in the longitudinal and transverse directions. Because of the composite’s structural homogeneity, without texturing, characteristics are isotropic. Improving the material’s structural homogeneity helps to keep its mechanical and anti-friction qualities stable at high temperatures and stresses in the air. The performed studies demonstrated the correctness of the developed manufacturing technology that was confirmed by the electron microscopy method, micro-X-ray spectral analysis, mechanical and tribological tests. The developed high-temperature antifriction composite can be recommended for severe operating conditions, such as friction units of turbines, gas pumping stations, and high-temperature units of foundry metallurgical equipment.

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40

Almataev, T., N. Almataev, and D. Moidinov. "Research of the Tribological Properties of Composite Polymer Materials During the Breaking-in Period." Bulletin of Science and Practice 5, no. 11 (November 15, 2019): 242–48. http://dx.doi.org/10.33619/2414-2948/48/27.

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Анотація:

Results of research and development of composite polymer materials are presented. The aim of this work was the study and development of new composite polymer materials with optimal performance properties for the working bodies of machines and mechanisms. The surface grinding of the samples was carried out using an eccentric rotary brush according to the procedure previously presented by the authors. Tribological properties of polymeric materials and coatings were determined on a tribometer. The results of the study showed that the degree of influence of fillers on the strength and antifriction properties of composite polymer materials depends on the type and nature of the filler and binder.

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41

Vodyakov, V. N., Elena A. Radaykina, A. V. Kotin, V. V. Kuznetsov, and M. I. Murneva. "New Polyamide Composites for Friction Power Cylinders of Agricultural Machinery." Key Engineering Materials 816 (August 2019): 157–61. http://dx.doi.org/10.4028/www.scientific.net/kem.816.157.

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This article is devoted to the investigation of physicomechanical, tribological, and thermophysical properties of the polyamide antifriction composition, containing shungite and graphite with a total concentration of 2.5%. It is intended for the manufacture of elements of power hydraulic cylinders tribo-conjugation for agricultural machinery. A comparison of the characteristics of the developed composition with the characteristics of caprolon and the commercial carbon-filled composite UPA6-15A.

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42

Kolmakov, A. G., I. E. Kalashnikov, L. K. Bolotova, N. B. Podymova, R. A. Bykov, I. V. Katin, and L. I. Kobeleva. "STUDY OF THE PROPERTIES OF COMPOSITE MATERIALS BASED ON ANTIFRICTION ALLOY B83." Industrial laboratory. Diagnostics of materials 85, no. 5 (June 5, 2019): 38–45. http://dx.doi.org/10.26896/1028-6861-2019-85-5-38-45.

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43

Jamroziak, Krzysztof, Tetiana Roik, Oleg Gavrish, Iuliia Vitsiuk, Grzegorz Lesiuk, Jose A. F. O. Correia, and Abílio De Jesus. "Improved manufacturing performance of a new antifriction composite parts based on copper." Engineering Failure Analysis 91 (September 2018): 225–33. http://dx.doi.org/10.1016/j.engfailanal.2018.04.034.

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44

Kalashnikov, I. E., L. K. Bolotova, I. V. Katin, L. I. Kobeleva, A. G. Kolmakov, R. S. Mikheev, and N. V. Kobernik. "Production of antifriction composite filler rods based on babbit B83 by extrusion." Inorganic Materials: Applied Research 8, no. 2 (March 2017): 335–39. http://dx.doi.org/10.1134/s207511331702006x.

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45

Li, Ying, Bian Xiao Li, and Wen Jun Zou. "The Relationship between Nanocrystalline Structure and Frictional Properties of Nanodiamond/Ni Composite Coatings by Brush Plating." Applied Mechanics and Materials 80-81 (July 2011): 683–87. http://dx.doi.org/10.4028/www.scientific.net/amm.80-81.683.

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Анотація:

Nanodiamond/Ni and Ni coatings were fabricated via brush plating. Nanocrystalline structure of the composite coating was investigated by SEM and XRD. The results showed that the composite coatings are nanocrystalline structure. The hardness of the nanodiamond/Ni composite coating is higher greatly than that of Ni coating. At same time, the reasons of formation nanocrystalline were discussed, which include the nucleation rate with the increase of a high over-potential, the reciprocating motion between brush and work piece, the heterogeneous nucleation of nanodiamond. The nanodiamonds as second phases make grain finer. The nanodiamonds of core-shell structure play the important role in wear resistance and antifriction. So the wear resistance of the composite coatings is significantly higher than nickel coating’s.

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46

Krishnamurthy, L., G. L. Shekar, D. Abdul Budan, and B. K. Sridhara. "Machinability Assessment of Aluminium-Graphite-Silicon Carbide Hybrid Composites." Advanced Materials Research 894 (February 2014): 22–26. http://dx.doi.org/10.4028/www.scientific.net/amr.894.22.

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Aluminium silicon carbide particulate composites have wide ranging applications in automobile, aerospace and military industries because of their attractive properties such as high strength-to weight ratio, high wear resistance, high temperature stability etc. From the machining point of view, these are one of the most difficult-to-machine materials, primarily due to the presence of SiC reinforcements causing an excessive wear of cutting tools during machining. On the other hand aluminium-graphite composites are widely used in tribological applications because of their excellent antifriction properties, wear resistance and antiseizure characteristics. Investigations have been carried out in this work to assess the machinability of aluminium matrix composites containing both SiC and graphite particulates as reinforcements. Turning experiments have been conducted on Aluminium-Graphite-Silicon Carbide hybrid composites using Carbide and PCD tool inserts to determine the flank wear. Experiments have been carried out based on Central Composite Design approach.

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47

Ying, Li Xia, Xiao Hui Wang, Chun Jie Zhang, Guan Nan Liu, and Gui Xiang Wang. "Effect of PTFE Content on Microstructure and Tribological Properties of Cu-Sn Coating." Advanced Materials Research 1142 (January 2017): 173–77. http://dx.doi.org/10.4028/www.scientific.net/amr.1142.173.

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Анотація:

The aim of this paper is to obtain the Cu-Sn-PTFE composite coating with wear-resistant and antifriction properties, which can improve the comprehensive performance of Cu-Sn coating and satisfy the self-lubricating property in special working condition. This coating was prepared by pulse current on the basis of non-cyanide pyrophosphate-stannate Cu-Sn plating bath. The effect of PTFE content on the microstructure, composition, microhardness, and tribological properties were analyzed and compared in detail. Results show that with appropriate PTFE content, the composite coating of Cu-Sn-PTFE displays preferable low friction and anti-wear behavior.

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48

Ren, Zhiying, Yu Yang, Youxi Lin, and Zhiguang Guo. "Tribological Properties of Molybdenum Disulfide and Helical Carbon Nanotube Modified Epoxy Resin." Materials 12, no. 6 (March 18, 2019): 903. http://dx.doi.org/10.3390/ma12060903.

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In this study, epoxy resin (EP) composites were prepared by using molybdenum disulfide (MoS2) and helical carbon nanotubes (H-CNTs) as the antifriction and reinforcing phases, respectively. The effects of MoS2 and H-CNTs on the friction coefficient, wear amount, hardness, and elastic modulus of the composites were investigated. The tribological properties of the composites were tested using the UMT-3MT friction testing machine, non-contact three-dimensional surface profilometers, and nanoindenters. The analytical results showed that the friction coefficient of the composites initially decreased and then increased with the increase in the MoS2 content. The friction coefficient was the smallest when the MoS2 content in the EP was 6%, and the wear amount increased gradually. With the increasing content of H-CNTs, the friction coefficient of the composite material did not change significantly, although the wear amount decreased gradually. When the MoS2 and H-CNTs contents were 6% and 4%, respectively, the composite exhibited the minimum friction coefficient and a small amount of wear. Moreover, the addition of H-CNTs significantly enhanced the hardness and elastic modulus of the composites, which could be applied as materials in high-temperature and high-pressure environments where lubricants and greases do not work.

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49

Mu, Bo, Xin Li, Baoping Yang, Jinfeng Cui, Xia Wang, Junhong Guo, Xuemei Bao, and Li Chen. "Microstructure and tribological properties of epoxy composites modified by methyl silicone oil-loaded microcapsules and/or reinforced with potassium hexatitanate whiskers." High Performance Polymers 32, no. 3 (July 30, 2019): 334–43. http://dx.doi.org/10.1177/0954008319862315.

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Self-lubricating functional microcapsules using melamine-formaldehyde resin encapsulating methyl silicone oil as core materials were synthesized by in situ polymerization method. And they are further adopted as antifriction additive to improve the tribological properties of binary and ternary epoxy (EP) composites, which were fabricated by incorporating microcapsules and the potassium hexatitanate whiskers (PTWs) into the EP matrix. The tribological behaviors of the as-synthesized EP composites have been evaluated by means of a block-on-ring high-speed wear tester. The results demonstrated that the friction coefficient and wear rate of EP /microcapsules binary composites decreased with the increase of microcapsule concentration due to the self-lubricating effect of the core material. For the EP /microcapsules/PTWs ternary composites, not only the mechanical properties and thermal stability PTWs were improved, but also the friction reduction and antiwear effect of the ternary composite are further enhanced due to the synergistic effect of PTWs and microcapsules.

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50

Roik, Tetiana Anatoliivna, and Yuliia Yuriivna Vitsiuk. "The Properties of the New Composite Antifriction Parts for Printing Equipment’s Friction Units." Технологія і техніка друкарства, no. 2(56) (June 12, 2017): 16–23. http://dx.doi.org/10.20535/2077-7264.2(56).2017.84485.

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