Effect of SiC particle size on the physical and mechanical properties of extruded Al matrix nanocomposites |
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| Affiliation: | 1. Powder Metallurgy Division, Manufacturing Department, Central Metallurgical Research and Development Institute, Egypt;2. Department of Mechanical Design and Production Engineering, Faculty of Engineering, Zagazig University, P.O. Box 44519, Egypt;1. Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, Oxfordshire, UK;2. Advanced Materials Group, Faculty of Engineering, University of Buenos Aires, Buenos Aires, Paseo Colón 850, Ciudad de Buenos Aires 1063, Argentina;3. Department of Mechanical Engineering and Mathematical Sciences, Oxford Brookes University, Wheatley Campus, Oxford OX33 1HX, UK;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;2. School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, PR China;1. School of Materials Science and Engineering, Xi''an University of Technology, NO. 5 South Jinhua Road, Xi''an 710048, China;2. Xi''an Thermal Power Research Institute Co. Ltd., No. 99 Yanxiang Road, Xi’an 710054, China;3. Joining and Welding Research Institution, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan |
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| Abstract: | In this work, the effect of SiC particle size and its amount on both physical and mechanical properties of Al matrix composite were investigated. SiC of particle size 70 nm, 10 μm and 40 μm, and Al powder of particle size 60 μm were used. Composites of Al with 5 and 10 wt.% SiC were fabricated by powder metallurgy technique followed by hot extrusion. Phase composition and microstructure were characterized. Relative density, thermal conductivity, hardness and compression strength were studied. The results showed that the X-ray diffraction (XRD) analysis indicated that the dominant components were Al and SiC. Densification and thermal conductivity of the composites decreased with increasing the amount of SiC and increased with increasing SiC particle size. Scanning electron microscope (SEM) studies showed that the distribution of the reinforced particle was uniform. Increasing the amount of SiC leads to higher hardness and consequently improves the compressive strength of Al–SiC composite. Moreover, as the SiC particle size decreases, hardness and compressive strength increase. The use of fine SiC particles has a similar effect on both hardness and compressive strength. |
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| Keywords: | Aluminum matrix composite SiC particle size and amount Extrusion Al–SiC properties |
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