Relevant bibliographies by topics / Metal Matrix Nanocomposite

Academic literature on the topic 'Metal Matrix Nanocomposite'

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Published: 14 March 2023

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Journal articles on the topic "Metal Matrix Nanocomposite"

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Yatsyshen, Valeriy, Irina Potapova, and Vyacheslav Shipaev. "Polaritons in Nanocomposites of Metal Nanoparticles – Dielectric." NBI Technologies, no. 2 (October 2019): 39–53. http://dx.doi.org/10.15688/nbit.jvolsu.2019.2.7.

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The article studies the main characteristics of surface polaritons in composite nanomaterials. The authors consider composite media such as noble metal nanoparticles randomly distributed in a transparent dielectric matrix and build dispersion curves of polaritons in such nanocomposites. The paper shows calculating optical parameters of the surface polariton for several values of the radius of metal nanoparticles and the nanocomposite filling parameter. The authors also present the calculations of the complex refractive index for polaritons in composites with nanoparticles of different metals. In addition, the authors find the dependences of the real and imaginary parts of the complex refractive index of the nanocomposite on the normalized frequency for membranes with different thicknesses and calculate real and imaginary parts of dielectric constant for waves in several metals. Besides, the article provides an overview of important stages in the study of surface electromagnetic waves. It shows that the variation of the structure materials, size and concentration of nanoparticles opens wide possibilities for controlling the optical properties of composite mediums and their practical application. The considered nanocomposites are artificially created media whose material parameters can be controlled. The first method consists in changing the relative volume of the nanoparticles filling of the dielectric matrix. The second method consists in changing the dielectric constant of the nanocomposite matrix. The authors emphasize that the dielectric constant of the nanocomposite in this case acquires resonant properties in contrast to the permeability of the nanoparticles themselves.
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Rasoolpoor, M., R. Ansari, and MK Hassanzadeh-Aghdam. "Dynamic behavior of particulate metal matrix nanocomposite plates under low velocity impact." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 1 (September 17, 2019): 180–95. http://dx.doi.org/10.1177/0954406219875781.

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The main purpose of this work is to investigate low velocity impact behavior of metal matrix nanocomposite plates reinforced with silicon carbide nanoscale particles. First, a micromechanical model is proposed to predict the effective mechanical properties of metal matrix nanocomposites. Two features of the nanocomposite microstructure affecting the elastic properties, including agglomerated state of silicon carbide nanoparticles and size factor, are taken into account in the micromechanical simulation. Then, finite element method is used to analyze the time histories of contact force and center deflection of silicon carbide nanoparticle-reinforced metal matrix nanocomposite plates. Several detailed parametric studies are accomplished to explore the influence of volume fraction, diameter and dispersion type of silicon carbide nanoparticles, spherical impactor velocity and diameter, plate dimensions, as well as different boundary conditions on the dynamic response of metal matrix nanocomposite plates. The presented approach accuracy is verified with the available open literature results displaying a clear agreement. The results indicate that adding the silicon carbide nanoparticles into the metal matrix materials leads to a reduction in plate center deflection and an increase in contact force between the plate and projectile. Moreover, it is found that the nanoparticle agglomeration dramatically decreases the contact force and increases the center deflection of metal matrix nanocomposite plates.
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M. Vijaya Sekhar Babu, A. Rama Krishna, and K. N. S. Suman. "Improvement of Tensile Behaviour of Tin Babbitt by Reinforcing with Nano Ilmenite and its Optimisation by using Response Surface Methodology." International Journal of Manufacturing, Materials, and Mechanical Engineering 7, no. 1 (January 2017): 37–51. http://dx.doi.org/10.4018/ijmmme.2017010103.

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Metal Matrix Nanocomposites are made from conventional materials and alloys as matrix materials and had become prominent in improving the mechanical behaviour. In this paper, the authors have fabricated a Tin Babbitt particulate metal matrix nanocomposite reinforced with Ilmenite (FeTiO3). For systematic understanding or effect of processing parameters on the tensile behaviour, the central composite design of response surface methodology was used. Metal matrix nanocomposite was fabricated by using ultrasonic assisted stir casting technique. Stirring time, ultrasonic processing time, Wt.% of nanoparticles were taken as processing parameters. The objective of the work is to improve the tensile behaviour of Tin Babbitt and understand the effect of processing parameters on the tensile strength of the Tin Babbitt metal matrix nanocomposite and then optimise it for maximum tensile strength. It was found that tensile strength was improved due to the nano reinforcement.
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Hassanzadeh-Aghdam, Mohammad K. "Micromechanics-based thermal expansion characterization of SiC nanoparticle-reinforced metal matrix nanocomposites." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 1 (January 30, 2018): 190–201. http://dx.doi.org/10.1177/0954406218756447.

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Understanding the structure–property relations for metal matrix nanocomposites reinforced with nanoparticles is a key factor for a reliable and optimal design of such new material systems. In the present study, coefficient of thermal expansion of silicon carbide (SiC) nanoparticle-reinforced aluminum (Al) matrix nanocomposites is predicted using a three-dimensional unit cell based micromechanical approach. The model takes into account the aluminum carbide (Al4C3) interphase region formed due to the reaction between SiC nanoparticles and surrounding Al matrix. The effects of some critical parameters, including volume fraction and diameter of SiC nanoparticles, interphase features such as geometry and material properties on the coefficient of thermal expansion of Al nanocomposite are extensively investigated. The obtained results clearly reveal the high influence of the interphase region on the coefficient of thermal expansion of Al nanocomposite. Based on the simulation results, the coefficient of thermal expansion of Al nanocomposite nonlinearly decreases with the increase in the interphase thickness or decreasing SiC nanoparticles diameter. Furthermore, the role of interphase in the thermal expansion behavior of Al nanocomposite becomes more prominent with the reduction in the nanoparticle diameter. Also, the coefficient of thermal expansion of Al nanocomposite linearly decreases as SiC nanoparticle volume fraction increases.
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Carneiro, Íris, José Valdemar Fernandes, and Sónia Simões. "Investigation on the Strengthening Mechanisms of Nickel Matrix Nanocomposites." Nanomaterials 11, no. 6 (May 28, 2021): 1426. http://dx.doi.org/10.3390/nano11061426.

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The strengthening effect of carbon nanotubes (CNTs) in metal matrix nanocomposites occurs due to several mechanisms that act simultaneously. The possible strengthening mechanisms for metal matrix nanocomposites reinforced with CNTs consist of: (1) load transfer, (2) grain refinement and texture strengthening, (3) second phase strengthening, and (4) strain hardening. The main focus of this work is to identify the strengthening mechanisms that play a role in the case of the Ni-CNT nanocomposite produced by powder metallurgy. For the dispersion and mixing of the metallic powders with CNTs, two different routes were performed by ultrasonication and ball milling. The results indicated that four different strengthening mechanisms are present in the nanocomposites and had a different contribution to the final mechanical properties. The load transfer and the increase in dislocation density seem to strongly affect the properties and microstructure of the nanocomposite. The grain refinement and the presence of second phase particles have a small contribution in the strengthening of this nanocomposite, since the introduction of CNTs in the Ni matrix slightly affects the size and orientation of the grains in the matrix and a few nanometric particles of Ni3C were identified.
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Poovazhgan, Lakshmanan. "Turning Experiments on Al/B4C Metal Matrix Nanocomposites." Materials Science Forum 979 (March 2020): 16–21. http://dx.doi.org/10.4028/www.scientific.net/msf.979.16.

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In recent years, aluminum alloys reinforced with nanosized ceramic particulates are finding wider applications in various engineering industries like automobile, aircraft, electronics and sports. The requirement of accurate machining of nanocomposite has also gets increased. In this research work, aluminum alloy 6061 reinforced with 1.5 Wt. % of nanoB4C particulate was fabricated in cylindrical shape using ultrasonication assisted casting process. Medium duty lathe with poly crystalline diamond insert tool of 1600 grade was used to turn the Al/B4C nanocomposites. During turning of Al/B4C nanocomposites, cutting parameters like depth of cut, speed and feed were varied as per predefined level. Surface roughness of machined surface and power consumption during machining were measured using surface roughness tester and wattmeter respectively. ANOVA analysis was carried out and the optimum parameters for machining the nanocomposite were found out using MINITAB software. The nanocomposite machined with optimum parameters show good surface finish and consumed minimum power.
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Fertikova, Tatyana E., Sergey V. Fertikov, Ekaterina M. Isaeva, Vyacheslav A. Krysanov, and Tamara A. Kravchenko. "New nanocomposites for deep water deoxygenation." Kondensirovannye sredy i mezhfaznye granitsy = Condensed Matter and Interphases 23, no. 4 (November 24, 2021): 614–25. http://dx.doi.org/10.17308/kcmf.2021.23/3682.

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New metal-polymer nanocomposites for deep water deoxygenation have been obtained and studied. A macro- and monoporous sulphocation exchanger with a nanometer pore size was used as the polymer matrix, and the metal was nanodispersed copper deposited in the pores of the matrix. A specific feature of the studied nanocomposites is their sodium ionic form, which eliminates the possibility of the formation of soluble copper oxidation products. The established linear dependence of the copper capacity on the number of cycles of ion-exchange saturation - chemical deposition shows that the process of metal deposition into the pores of the matrix does not have significant obstacles during 10 cycles and contributes to the production of high-capacity samples.The high efficiency and duration of the life cycle of high-capacity copper ion exchanger nanocomposites have been shown. Experimental studies of water deoxygenation in column-type apparatus with a nanocomposite nozzle were confirmed by a theoretical analysis of the process dynamics. Experimental data and theoretical calculations showed the deep level of water deoxygenation had practically unchanged values of pH and electrical conductivity. Residual oxygen can be controlled and does not exceed 3 μg/l (ppb).The hygienic and economic substantiation of the expediency of using the obtained nanocomposites is provided. The necessity of using modern nanocomposite metal-polymer materials for deep water deoxygenation circulating in technological systems was analysed. When using this innovation, the metal components of the distribution facilities will be protected from corrosion and, therefore, the hygienic requirements for the water quality of centralised drinking water supply systems will be ensured. Deep chemical water deoxygenation using copper ion-exchange polymer nanocomposites in sodium formallows solving the problem of the corrosion resistance of metals, ensuring that water meets hygienic requirements on a large scale.The competitive advantage of the considered water deoxygenation system in comparison with the known systems is the rejection of the use of precious metals-catalysts (palladium, platinum), pure hydrogen, and complex design solutions. The proposed new nanocomposite installation for water deoxygenation is characterised by its ease of use and can be built into a filter system for water purification.SWOT analysis of the advantages and disadvantages of the proposed method of water deoxygenation showed that its main advantages are the high oxygen capacity of the nanocomposite, low residual oxygen content (3 ppb (μg/l)) in the water, and ease of operation of the deoxygenator. Calculations of the economic efficiency of the nanocomposite have been carried out. The breakeven point is reached when producing only ~100 l of nanocomposite and a volume of sales ~1,600,000 roubles, above which a profit can be obtained. The payback period for an investment of ~15,000,000 roubles is rather short and will not exceed 2 years.
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Rostamzadeh, Taha, H. Shahverdi, A. Shanaghi, and T. Shahrabi. "EIS Study of Bulk Al-SiC Nanocomposite Prepared by Mechanical Alloying and the Hot Press Method." Advanced Materials Research 83-86 (December 2009): 1297–305. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.1297.

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Metal matrix composites (MMCs) are engineering materials in which a hard ceramic component is dispersed in a ductile metal matrix in order to obtain characteristics such as hardness and corrosion resistance. Corrosion resistance is one of the important properties of nanocomposites; however, the corrosion mechanism of the Al- SiC nanocomposite has not yet been determined. .In this study, bulk Al-5% SiC nanocomposite was prepared using mechanical alloying and the hot press method. Corrosion behavior was then investigated using EIS techniques such as Nyquist and the Bod diagram. A larger charge transfer resistance was found for the Al- SiC nanocomposite by the EIS diagrams, confirming its corrosion resistance in a 3.5wt% NaCl solution.
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Yoo, S. H., J. K. Yang, Sung Tag Oh, Kae Myung Kang, Sung Goon Kang, C. J. Lee, and Yong Ho Choa. "The Synthesis and Characteristics of Homogenously Dispersed CNT-Al2O3 Nanocomposites by the Thermal CVD Method and Pulsed Electric Current Sintering Process." Solid State Phenomena 121-123 (March 2007): 295–98. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.295.

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An optimum route to synthesize Al2O3-based composite powders with a homogeneous dispersion of carbon nanotubes (CNTs) was investigated. CNT/Metal/Al2O3 nanocomposite powders were fabricated by thermal chemical vapor deposition (CVD) over a metal catalyst homogeneously dispersed into an Al2O3 matrix by the means of chemical and selective reduction processes. The nanocomposite powders were densified by Pulse Electric Current Sintering (PECS). The experimental results show that the CNT/Metal/Al2O3 nanocomposites have unique electrical properties.
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Chakravadhanula, Venkata Sai Kiran, Yogendra Kumar Mishra, Venkata Girish Kotnur, Devesh Kumar Avasthi, Thomas Strunskus, Vladimir Zaporotchenko, Dietmar Fink, Lorenz Kienle, and Franz Faupel. "Microstructural and plasmonic modifications in Ag–TiO2 and Au–TiO2 nanocomposites through ion beam irradiation." Beilstein Journal of Nanotechnology 5 (September 1, 2014): 1419–31. http://dx.doi.org/10.3762/bjnano.5.154.

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The development of new fabrication techniques of plasmonic nanocomposites with specific properties is an ongoing issue in the plasmonic and nanophotonics community. In this paper we report detailed investigations on the modifications of the microstructural and plasmonic properties of metal–titania nanocomposite films induced by swift heavy ions. Au–TiO2 and Ag–TiO2 nanocomposite thin films with varying metal volume fractions were deposited by co-sputtering and were subsequently irradiated by 100 MeV Ag8+ ions at various ion fluences. The morphology of these nanocomposite thin films before and after ion beam irradiation has been investigated in detail by transmission electron microscopy studies, which showed interesting changes in the titania matrix. Additionally, interesting modifications in the plasmonic absorption behavior for both Au–TiO2 and Ag–TiO2 nanocomposites were observed, which have been discussed in terms of ion beam induced growth of nanoparticles and structural modifications in the titania matrix.
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Dissertations / Theses on the topic "Metal Matrix Nanocomposite"

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Pallikonda, Mahesh Kumar Pallikonda. "FORMING A METAL MATRIX NANOCOMPOSITE (MMNC) WITH FULLY DISPERSED AND DEAGGLOMERATED MULTIWALLED CARBON NANOTUBES (MWCNTs)." Cleveland State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=csu1503937490966191.

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Evarts, Jonathan S. "Advanced Processing Techniques For Co-Continuous Ceramic Composites." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1218218162.

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Kandemir, Sinan. "Semi-solid processing of metal matrix nanocomposites." Thesis, University of Leicester, 2013. http://hdl.handle.net/2381/28146.

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Metal matrix nanocomposites (MMNCs) can significantly improve mechanical properties of light alloys such as aluminium alloys beyond the properties of conventional metal matrix composites (where the reinforcement particles are micronsized). Therefore, MMNCs are potentially strong candidates for use in the automotive industry, where the mechanical performance and energy conservation are highly demanded. However, the challenge is to incorporate ceramic nanoparticles into liquid metals due to their large surface – to – volume ratio and poor wettability. In the present study, several nanoparticle feeding mechanisms (the most critical factor in the fabrication of nanocomposites by the ultrasonic method) were explored. SiC and TiB2 nanoparticles with an average diameter between 20nm and 30nm were dispersed through liquid A356 alloy with a green compact nanoparticle incorporation method under ultrasonic cavitation and streaming. The green compact method which has been developed during this project was found to be a promising mechanism achieving the engulfment and relatively effective distribution of the nanoparticles into the melt. Advanced FEGSEM and TEM techniques were used for the microstructural characterisation of the nanocomposites. The microstructural studies reveal that the nanoparticles were embedded into A356 alloy without any observed intermediate phase between the particles and matrix. It has been shown that with only 0.8 wt.% addition of the nanoparticles, the hardness was considerably improved. The nanocomposite billets were reheated into the semi-solid state to be thixoformed at a solid fraction between 0.65 and 0.70 for near net shape components with reduced porosity. The feasibility of thixoforming for aluminium nanocomposites was demonstrated. The microstructures, hardness and tensile mechanical properties of the thixoformed nanocomposites were investigated and compared with those of the asreceived A356 and thixoformed A356 alloys. The tensile properties of the thixoformed nanocomposites were enhanced compared to thixoformed A356 alloy without reinforcement, indicating the strengthening effects of the nanoparticles.
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Vanderhout, Amy Ruth. "Synthesis and mechanical characterization of aligned carbon nanotube metal- and carbon-matrix nanocomposites." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127095.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, May, 2020
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 203-224).
Carbon nanotube (CNT) assemblies are seeing increasing use in engineering applications due to their advantaged, mass-specific physical properties. The high strength-to-weight ratio, electrical and thermal conductivity, and elastic properties make CNTs ideal for many aerospace, automotive, and electrical applications. In structural materials, CNTs are an outstanding candidate to provide nano-reinforcement, both in hybrid composites and nanocomposites, and they have been found to improve the hardness, yield strength, and conductivity of their matrix material. Additional enhancement of these matrices can be realized by using aligned CNTs (A-CNTs) of increased volume fraction, as explored in this work.
In this thesis, ceramic matrix nanocomposites (CMNCs), specifically A-CNT/carbon matrix nanocomposites (A/C-NCs), are synthesized by first infusing a carbon precursor resin into A-CNT arrays with CNT volume fractions (v[subscript f]) ranging from 1-30 vol%, and then pyrolyzing the resin to create a carbon matrix around the A-CNTs. Previous work with A/C-NC hardness suggests that such a lightweight, superhard material may rival the density-normalized hardness of diamond at high v[subscript f]. Various processes were refined and tested in this work, yielding microscale void-free A/CNCs up to 30% v[subscript f], with an ~7% improvement in hardness over baseline pyrolytic carbon (PyC) for 1% v[subscript f] A/C-NCs and <10% improvement in hardness for 5% v[subscript f] A-CNTs. A reinfusion (i.e. an initial infusion/pyrolysis cycle with three additional reinfusion/pyrolysis cycles) procedure was developed and implemented, and testing is recommended as immediate future work.
Although hardness determination of these reinfused samples is left for future work, the X-ray CT images of the final A/C-NCs after the fourth infusion show excellent infusion and few voids, suggesting that high hardness will be achieved. This thesis also explores and develops synthesis techniques for metal matrix nanocomposites (MMNCs), focusing on an aluminum matrix. As the surface energy of ACNTs is not conducive to wetting by Al (and many other metals), this surface energy must first be altered to allow Al matrix infusion for consistent composite fabrication. TiO₂ is conformally decorated onto ~100 [mu]m-tall A-CNT arrays via atomic layer deposition (ALD). A reduction process for the TiO₂ coating was developed, and a reduction to TiH₂ was determined to be promising, as the TiH₂ will not oxidize prior to Al infusion but can easily be reduced in a vacuum oven apparatus designed specifically to meet the needs of Al infusion.
Towards MMNCs, both solder and aluminum matrices are infused into the TiO₂-decorated A-CNTs. The solder experiments yielded mixed success, as the results suggest that both the reduction and the vacuum infusion steps are important factors determining successful wetting. Although Al infusion into an A-CNT array was unsuccessful without a dedicated Al infusion apparatus, molten Al was found to wet Ti well, which suggests that the Ti coating may allow for successful A-CNT wetting. Additional recommendations are provided to further refine the A/Al-NC fabrication process to improve Al infusion.
by Amy Ruth Vanderhout.
S.M.
S.M. Massachusetts Institute of Technology, Department of Aeronautics and Astronautics
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PHILIPPE, CLOTILDE. "Synthese et caracterisation de nanocomposites metal/ matrice hybride organo-minerale." Paris 6, 2001. http://www.theses.fr/2001PA066197.

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L'objectif de cette these est de synthetiser et de disperser des nanoparticules metalliques dans une matrice hybride. Les etapes a maitriser sont : l'etape de reduction des precurseurs metalliques, le controle de la taille des objets metalliques, le taux de metal accessible dans le materiau et la structure du materiau. La matrice hybride est constituee d'un reseau siloxane et d'un reseau d'oxopolymere de zirconium. Les precurseurs utilises sont le pmhs, un polymere siloxane constitue d'unite d h contenant la fonction si-h, et le n-propoxyde de zirconium. Le sol elabore est reactif vis a vis de la reduction des sels d'or, de platine, d'argent, de cuivre et de nickel. Le controle de la taille des objets metalliques formes est assure par une fonction complexante. Le rapport ligand / metal (l/m) introduit dans le sol permet de controler la taille des particules ainsi que leur etat d'agregation. Pour des taux l/m20%, les particules d'or sont monodisperses et bien reparties dans la matrice d'accueil. La taille moyenne des objets obtenus est de 3nm. La teneur maximal en metal est de 19% en masse, soit 3% en fraction volumique pour les materiaux dopes or. Au-dela de cette teneur en metal, on observe l'agregation des particules metalliques, ainsi qu'une separation de phase de la composante zirconium. Le materiau contient trois composantes. La composante siloxane est formee d'un reseau d'unites t (simeo 3). Ces unites sont cocondensees entre elles et avec le reseau d'oxopolymere de zirconium. Les liens chimiques sont des ponts si-o-si et si-o-zr. La composante zirconium est un reseau d'oxychlorure de zirconium hydrate amorphe. Ce reseau joue un role de liant mineral et s'organise sous forme de fibres dans le reseau siloxane. L'interface entre les deux reseaux de la matrice d'accueil est importante. Les particules metalliques, grace a leur couverture de ligands silanes en surface, se dispersent dans la composante siloxane.
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Negroni, Matteo. "Studio e sviluppo di tecniche per la produzione di nanocompositi a matrice di alluminio." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/4949/.

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Foundry aluminum alloys play a fundamental role in several industrial fields, as they are employed in the production of several components in a wide range of applications. Moreover, these alloys can be employed as matrix for the development of Metal Matrix Composites (MMC), whose reinforcing phases may have different composition, shape and dimension. Ceramic particle reinforced MMCs are particular interesting due to their isotropic properties and their high temperature resistance. For this kind of composites, usually, decreasing the size of the reinforcing phase leads to the increase of mechanical properties. For this reason, in the last 30 years, the research has developed micro-reinforced composites at first, characterized by low ductility, and more recently nano-reinforced ones (the so called metal matrix nanocomposite, MMNCs). The nanocomposites can be obtained through several production routes: they can be divided in in-situ techniques, where the reinforcing phase is generated during the composite production through appropriate chemical reactions, and ex situ techniques, where ceramic dispersoids are added to the matrix once already formed. The enhancement in mechanical properties of MMNCs is proved by several studies; nevertheless, it is necessary to address some issues related to each processing route, as the control of process parameters and the effort to obtain an effective dispersion of the nanoparticles in the matrix, which sometimes actually restrict the use of these materials at industrial level. In this work of thesis, a feasibility study and implementation of production processes for Aluminum and AlSi7Mg based-MMNCs was conducted. The attention was focused on the in-situ process of gas bubbling, with the aim to obtain an aluminum oxide reinforcing phase, generated by the chemical reaction between the molten matrix and industrial dry air injected in the melt. Moreover, for what concerns the ex-situ techniques, stir casting process was studied and applied to introduce alumina nanoparticles in the same matrix alloys. The obtained samples were characterized through optical and electronic microscopy, then by micro-hardness tests, in order to evaluate possible improvements in mechanical properties of the materials.
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Corbelli, G. "SYNTHESIS AND CHARACTERIZATION OF METAL-POLYMER NANOCOMPOSITES FOR STRETCHABLE ELECTRONICS APPLICATIONS." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/168731.

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The possibility to develop electric devices which can be rolled up, bent or even deformed without lose their funtionality is one of the main and interesting challenges nowadays in materials science and engineering. Indeed, this represents the fundamental step towards the development and the realization of stretchable electronics devices. Till now, several techniques have been developed in order to produce stretchable conductive elements, basically by joining the electrical properties of metals and the mechanical features of polymers. Nevertheless, none of these techniques is able to satify all the basic requirements needed in the realization of metal conductive traces on stretchable polymers. The main purpose of this thesis is the presentation of the Supersonic Cluster Beam Implantation as a novel approach for the production of stretchable conductive nanocomposite systems exploitable in the development of stratchable devices. This will be accomplished through the synthesis of Au-PDMS nanocomposites and the characterization of thier electrical, optical, morphological and mechanical properties. Moreover, this thesis reports on the successful use of SCBI to fabricate first examples of deformable devices, such as the stretchable and biocompatible electrodes for biomedical applications.
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MINNAI, CHLOE'. "OPTICAL AND ELECTRICAL PROPERTIES OF METAL POLYMER NANOCOMPOSITES FABRICATED WITH SUPERSONIC CLUSTER BEAM IMPLANTATION." Doctoral thesis, Università degli Studi di Milano, 2018. http://hdl.handle.net/2434/637068.

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Clusters are aggregates composed of a countable number of atoms or molecules, starting with the dimer and reaching, with a vaguely defined upper bound of several hundred thousand atoms, into that interesting size range. Clusters have properties that are different from both atoms and bulk materials as in these small aggregates the surface-to-volume ratio is very large and hence the surface atoms, play a dominant role compared to the bulk ones. By assembling preformed clusters, one can build nanostructured materials. These can be divided in two main categories: cluster assembled films and nanocomposites. In the former case nanoparticles are deposited on a substrate in the latter they are incorporated in a matrix, a polymer for instance. Nanostructured materials offer exciting pathway for the construction of macroscopic materials with designer-specified optical, electrical, and catalytic properties which reflect the ones of their building blocks. The object of this thesis is the study of the optical and electrical properties of metal-polymer nanocomposites (MPNs) in response to mechanical deformation. Reflectance of MPNs is also exploited to develop reflective and bendable diffracting gratings which can be adapted to concave surfaces in order to add focusing power to the diffracting one. A further study regards the evolution of the electrical resistance during the growing of the nanostructured materials on different substrates. Then, the electrical properties of the systems in response to a voltage applied are explored, to find if peculiar phenomena such as resistance switching could occur. Recipes to fabricate robust and reproducible devices which exhibit controllable resistance switching were developed, both for cluster-assembled thin films and MPNs; in this latter case the possibility of controlling the switching activity with mechanical bending is demonstrated as well.
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Ghisleri, C. "FABRICATION AND CHARACTERIZATION OF NANOCOMPOSITE-BASED ELASTOMERIC OPTICAL DEVICES." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/229735.

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Adaptive and tunable optics, consisting in the correction of perturbed light wavefronts by means of deformable optical devices, was first introduced in the 50’s by Babcock [1] and developed in the 70’s by Buffington and Hardy independentely. Nowadays it represents a well established technology mainly exploited in astronomy in order to reduce the effects of atmospheric perturbations limiting the attainable resolution of large astrophysical telescopes. Adaptive and tunable optics is exploited in ophthalmology, microscopy and photonics as well for the improvement of imaging performances. However exploitation of adaptive and tunable optics is nowadays limited to high-level or prototype-level instrumentation because of the high complexity and fabrication costs of the deformable optical devices, responsible for the correction of aberrations in light wavefronts. The fabrication of functional, simpler and cheaper deformable optical devices is fundamental in order to apply adaptive and tunable optics in more commonly available instrumentation. Such deformable optical devices typically consist in deformable mirrors or gratings, able to change their optical properties (shape, focal length or pitch) dynamically, according to the perturbations of the wavefront or the wanted outgoing optical features. The technologies on which such deformable optical devices rely (for example segmented mirrors, reflective thin membrane, MEMS tunable gratings) suffer of several drawbacks in terms of high weight and complexity or low deformability and tunability of the optical properties. New technologies are required, aiming to overcome these issues. The fabrication of non planar diffraction gratings, required in a number of optical mounts for the correction of spherical or higher order aberrations affecting the diffracted beam or to add focusing to diffractive capabilities, is of concern as well for the necessary high fabrication costs. The possibility to easily fabricate low-cost arbitrarily shaped reflective diffraction gratings would be a breakthrough for example in monochromoators or spectral imaging techniques. Elastomeric optics represents a promising technology for the fabrication of optical devices on highly deformable and conformable elastomeric substrates. Reflective elastomeric optics, obtained by metallization of elastomeric substrates, is particularly interesting because of the possibility to limit the dimensions of elastomeric device based optical instruments respect to devices working in transmission. However the metallization of elastomeric substrates by classic coating techniques is problematic because of the low adhesion and resilience of the reflective metal layer deposited on the elastomer surface. Metal-elastomer nanocomposites may represent an alternative and effective approach for the fabrication of reflective elastomeric optical devices since the reflective metal is embedded in the elastomeric matrix and does not consist in a continuous rigid metal layer, solving adhesion and resilience problems of coating techniques. However currently available nanocomposites synthesis techniques (chemical or metal ion implantation approaches) do not guarantee the achievement of reflectivity and surface smoothness required for deformable optical devices. Driven by the motivations described above, the present thesis is devoted to the fabrication, characterization and exploitation of metal-elastomer nanocomposite based deformable optical components (mirrors and diffraction gratings) obtained by means of Supersonic Cluster Beam Implantation (SCBI). SCBI allows implanting electrically neutral metal nanoparticles (silver in this work) with low kinetic energy in elastomeric substrates like Polydimethylsiloxane (PDMS). The optical and morphological characterization of the Ag/PDMS nanocomposite will demonstrate that the issues encountered for the fabrication of reflective elastomeric optical components by currently available nanocomposite synthesis techniques can be overcome by using SCBI. In particular optical properties of reflective elastomeric optical components synthesized by SCBI are affected by Surface Plasmon Resonance (SPR) characterizing silver particles of nanometric size implanted in the elastomeric matrix. A characterization of SPR in light of the theoretical model describing the optical behavior of metal nanoparticles embedded in a dielectric matrix and upon applied strain is necessary for a better understanding and control of the optical properties of the devices during the fabrication process.
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Mohamed, Othman [Verfasser], and Lothar [Akademischer Betreuer] Wagner. "Synthesis and characterization of Al6061/Al2O3 metal matrix nanocomposites fabricated by stir-casting / Othman Ahmed Othman Mohamed ; Betreuer: Lothar Wagner." Clausthal-Zellerfeld : Technische Universität Clausthal, 2019. http://d-nb.info/1231363193/34.

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Books on the topic "Metal Matrix Nanocomposite"

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Ceschini, Lorella, Arne Dahle, Manoj Gupta, Anders Eric Wollmar Jarfors, S. Jayalakshmi, Alessandro Morri, Fabio Rotundo, Stefania Toschi, and R. Arvind Singh. Aluminum and Magnesium Metal Matrix Nanocomposites. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-2681-2.

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Gupta, Manoj, S. Jayalakshmi, Lorella Ceschini, Arne Dahle, and Anders Eric Wollmar Jarfors. Aluminum and Magnesium Metal Matrix Nanocomposites. Springer Singapore Pte. Limited, 2016.

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Gupta, Manoj, S. Jayalakshmi, Lorella Ceschini, Arne Dahle, Anders Eric Wollmar Jarfors, Alessandro Morri, Fabio Rotundo, Stefania Toschi, and R. Arvind Singh. Aluminum and Magnesium Metal Matrix Nanocomposites. Springer, 2018.

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Gupta, Manoj, Lorella Ceschini, and Arne Dahle. Aluminum and Magnesium Metal Matrix Nanocomposites. Springer, 2016.

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Book chapters on the topic "Metal Matrix Nanocomposite"

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Zanella, Caterina, Stefano Rossi, and Flavio Deflorian. "Metal-Matrix Nanocomposite Coatings Produced by Electrodeposition." In Green Corrosion Chemistry and Engineering, 297–317. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527641789.ch10.

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Tekumalla, Sravya, Shikhar Bharadwaj, T. S. Srivatsan, and Manoj Gupta. "An Engineered Magnesium Alloy Nanocomposite: Mechanisms Governing Microstructural Development and Mechanical Properties." In Metal-Matrix Composites Innovations, Advances and Applications, 193–202. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72853-7_13.

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Alipour, Mohammad, Reza Eslami Farsani, and Yu A. Abuzin. "Influence of Graphene Nanoplatelet Reinforcements on Microstructural Development and Wear Behavior of an Aluminum Alloy Nanocomposite." In Metal-Matrix Composites Innovations, Advances and Applications, 233–46. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72853-7_16.

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Soni, Mahendra Kumar, Ovais Gulzar, Mir Irfan Ul Haq, and M. F. Wani. "Metal Matrix Nanocomposites." In Tribology and Sustainability, 53–64. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003092162-5.

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Bhowmik, Papiya, and Gaurav Arora. "Graphene/Metal Matrix Nanocomposites." In Metal Matrix Composites, 109–48. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003194910-5.

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Arora, Gaurav, and Himanshu Pathak. "Multi-scale Computational Analysis of Metal Matrix Nanocomposites." In Metal Matrix Composites, 81–115. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003194897-5.

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Harshit, Kumar, Pulkit Garg, and Pallav Gupta. "Metal Matrix Nanocomposites in Aircraft Engine and Space Applications." In Metal Matrix Composites, 203–32. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003194910-8.

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Ceschini, Lorella, Arne Dahle, Manoj Gupta, Anders Eric Wollmar Jarfors, S. Jayalakshmi, Alessandro Morri, Fabio Rotundo, Stefania Toschi, and R. Arvind Singh. "Metal Matrix Nanocomposites: An Overview." In Aluminum and Magnesium Metal Matrix Nanocomposites, 1–17. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2681-2_1.

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Kannan, Sekar. "Micro and Nanocomposites Produced by Different Casting Routes and Improved Mechanical and Tribological Properties." In Metal Matrix Composites, 1–16. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003194897-1.

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Ceschini, Lorella, Arne Dahle, Manoj Gupta, Anders Eric Wollmar Jarfors, S. Jayalakshmi, Alessandro Morri, Fabio Rotundo, Stefania Toschi, and R. Arvind Singh. "Ex Situ Production Routes for Metal Matrix Nanocomposites." In Aluminum and Magnesium Metal Matrix Nanocomposites, 19–40. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2681-2_2.

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Conference papers on the topic "Metal Matrix Nanocomposite"

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Li, Xiaochun, and Zhiwei Li. "Electroplated Si3N4 Reinforced Metal Matrix Nanocomposites." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41104.

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Permalloy NiFe matrix nanocomposite layers were electroplated on a copper substrate. The volume fraction of nano-sized Si3N4 particles in NiFe matrix was controlled by the addition of various percentages of Si3N4 particles in the NiFe electrolyte. The nanocomposite layers were analyzed by a scanning electron microscopy (SEM). Microhardness test was performed. With nano-sized Si3N4 particles in the NiFe matrix, the microhardness of NiFe was improved. The samples were then annealed at 800 °C for about 20 hours. The microhardness declined more with more Si3N4 particles in the NiFe matrix. The analysis result from Energy Dispersive Spectrometer (EDS) in the SEM showed that the hardness declination could be caused by the segregation of Si3N4 in the NiFe matrix. Finally this paper presents nanocomposite micromolds fabricated by electroplating onto polymer molds that were fabricated by micro-stereolithgraphy.
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Li, Ming, Chao Ma, Alex Fang, and Zhijian Pei. "Preparation of Metal Matrix Nanocomposite Powder Using Electroless Plating." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6676.

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Metal matrix nanocomposites (MMNCs) are anticipated to offer significantly better performance than existing superalloys for additive manufacturing (AM). However, traditional methods of preparing MMNC powder, such as high-energy ball milling, usually involve high cost and high energy consumption. This paper reports experimental results on a novel method to prepare MMNC feedstock powder. Nickel/alumina MMNC powder was successfully produced using electroless plating, containing a high fraction (66 vol. %) of alumina nanoparticles. Then, the MMNC powder was compacted into a disk shape with a hydraulic press and sintered with a tube furnace. After sintering at 1400 °C for 4 hours, the MMNC had a density of 4.16 g/cm3. Scanning electron microscopy observation, and X-ray diffractometry and energy-dispersive X-ray spectroscopy analysis were conducted on the sintered Ni/Al2O3 disk. As the alumina nanoparticles were added to nickel, an increased microhardness of HV0.5 189 was obtained.
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Yang, Yong, Jie Lan, and Xiaochun Li. "Ultrasonic-Based Fabrication of Bulk Aluminum Matrix Nanocomposite." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59632.

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Lightweight metal matrix nano-composites (MMNCs) (metal matrix with nano-sized ceramic particles) can be of significance for automobile, aerospace and numerous other applications. However, it is extremely difficult to disperse nano-sized ceramic particles uniformly in molten metal for casting. This paper presents a fabrication method for casting of bulk aluminum MMNCs by use of ultrasonic nonlinear effects, namely transient cavitation and acoustic streaming. Nano-sized SiC particles have been dispersed in molten aluminum alloy A356 for casting. Microstructural study was carried out and it validates a good distribution and dispersion of nano-sized SiC in aluminum alloy matrix. Hardness of the as-cast MMNCs have been improved significantly even with a low weight fraction of nano-sized SiC. The ultrasonic fabrication methodology is promising to produce a wide range of other MMNCs.
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Alam, M. K., P. Klein, and D. Garg. "Simulation of Thermal Transport in a Nanocomposite Blow Mold." In ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/ht2009-88265.

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In this study, the thermal transport issues for a nanocomposite material used in the blow molding process are addressed in the fabrication of the composite mold. For low production cycles, there is a significant interest in using lower cost composite molds to replace the expensive traditional metal molds used for making polymer parts by the blow molding process. A critical issue in using a polymer matrix composite as an alternative to a metal mold is the large difference in the thermal transport property. The composite mold design must integrate enhanced cooling so that the product can cool sufficiently within each cycle time. Nanocomposites that use carbon nanofiber offer improvements in thermal and mechanical properties; therefore they are potential candidates for making molds for polymer products. This paper describes the design of the cooling system for a nanocomposite blow mold using numerical simulations; and the processing steps by which the design is incorporated in the fabrication of the mold.
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Koludrovich, Michael J., and Yong X. Gan. "Nanoparticle Reinforced Metal Composites Prepared by Electrocodeposition." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62300.

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Improving the physical and mechanical properties such as hardness and strength of metal thin films can be achieved by incorporating nanoparticles into the pure metals, for example via electrocodeposition. However, the agglomeration of nanoparticles during electrocodeposition of nanocomposite thin films is an unresolved issue. This paper presents the preliminary results of electrocodeposition thin nanocomposite films under different processing conditions. The microstructure and distribution of Al2O3 nanoparticles in electrocodeposited Cu matrix nanocomposite thin films on a pure Al plate were examined. In addition, the effect of electrolyte concentration on the agglomeration of nanoparticles was studied. Different stirring times were used for electrodepositing the alumina/Cu nanocomposite and the pure Cu control film. Under the constant stirring condition, different deposition times including 1, 4, 8, 12, and 24 hours were taken to study the differences between the agglomeration states of the alumina nanoparticles with the time change. We also examined the effect of turning the electromagnetic stirrer ON and OFF at different time intervals from as short as every 20 minutes to as long as ON and OFF every 2 hours on the nanoparticle agglomeration in the film. Optical and electron microscopic studies were made to reveal the microstructure of the nanocomposite. It is found that there is no significant difference in microstructures for the specimens that made under either intermittent stirring or constant stirring for the same length of time.
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Ballesteros, J. M., C. N. Afonso, J. Solis, and R. Serna. "Laser Synthesis of Nanocomposite Cu:Al2O3 thin Films for Nonlinear Optical Switching." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1998. http://dx.doi.org/10.1364/cleo_europe.1998.cwf54.

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Metal nanocrystals embedded in dielectric matrices have been the subject of intense research during the last few years as promising candidates for all-optical switching applications. However, the lack of suitable techniques to produce these materials in waveguide configuration has hindered the use of nanocomposites in technological applications. Pulsed laser deposition (PLD) is a recently developed thin film technique that offers a new way to obtain and control the size and shape of the nanocrystals, thus introducing new possibilities to engineer the nonlinear optical parameters of the material. This work reports on the production of Cu nanocrystals embedded in amorphous Al2O3 matrix with a large nonlinear refractive index and a significantly reduced nonlinear absorption. The influence of the metal content and the measuring conditions on the nonlinear response of the nanocomposite films has been also analysed.
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Martínez-Franco, Enrique, Ming Li, Ricardo Cuenca Álvarez, Jesús González Hernández, Chao Ma, and Juan Manuel Alvarado Orozco. "Nickel/Alumina Metal Matrix Nanocomposites Obtained by High-Energy Ball Milling and Spark Plasma Sintering." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6610.

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Metal matrix nanocomposites (MMNCs) are anticipated to offer significantly better performance than existing superalloys. Nickel/alumina nanocomposite samples were fabricated with a powder metallurgy method, combining high-energy ball milling (HEBM) and spark plasma sintering (SPS). The objective of this research is to determine the effect of alumina nanoparticle fraction and HEBM parameters on the powder preparation and sintering processes, and resultant microstructure and properties. Nickel-based powders containing various fractions (1, 5 and 15 vol.%) alumina nanoparticles were prepared by HEBM. The initial particle sizes were 44 μm and 50 nm for nickel and alumina, respectively. The milling process was conducted by starting with mixing at 250 rpm for 5 min, followed by cycling operation at high and low speeds (1200 rpm for 4 min and 150 rpm for 1 min). Samples at different milling times (30, 60, 90 and 120 min) of each composition were obtained. Scanning electron microscopy (SEM) was used to evaluate the dispersion of nanoparticles in the powders at different milling times. SPS technique was used for consolidation of the prepared powders. SEM images showed that alumina nanoparticles are homogeneously dispersed in the metal matrix in the sample containing 15 vol.% alumina. Hardness measurements in cross sections of SPSed samples showed higher values for Ni/Al2O3 MMNC compared to pure Ni.
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Monteiro, Othon R., Sankaran Murugesan, Radhika Suresh, and Valery N. Khabashesku. "Corrosion- and Erosion-Resistant Metal Matrix Nanocomposite Coatings for the Oil and Gas Industry." In SPE International Oilfield Corrosion Conference and Exhibition. Society of Petroleum Engineers, 2016. http://dx.doi.org/10.2118/179933-ms.

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Rangelov, Rangel, Nikolay Hinov, Krum Petrov, and Lidya Vasileva. "Obtaining of Nanocomposite Material with Metal Matrix and Carbide Reinforcing Particles by Electromagnetic Stirring." In 2019 II International Conference on High Technology for Sustainable Development (HiTech). IEEE, 2019. http://dx.doi.org/10.1109/hitech48507.2019.9128284.

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He, F., Q. Han, Y. C. Chen, C. Xu, and L. Shao. "Study on Mechanical Properties of Al Metal Matrix Nanocomposites Processed Using Ultrasonic Vibration." In ASME 2009 International Manufacturing Science and Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/msec2009-84197.

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High intensity ultrasonic vibration was applied to disperse SiC nano-particles into molten A354 during solidification process to fabricate metal matrix nanocomposite (MMNCs). MMNCs: A354/SiC/1p was obtained by dispersing 1% SiC particles into the molten A354. The distribution of the nano-SiC particles in this material was investigated using scanning electron microscope. The mechanical properties of this nano composite were tested. A354/SiC/1p-T6 samples were also fabricated and tested. Mechanical properties of A354/SiC with different weight percentage of SiC particles were also investigated to find out the optimized content of particles. The results suggest that A354/SiC/0.5p-T6 with extra 15 minutes ultrasonic treatment has shown the highest mechanical properties.
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