Preparation of Al-Based Metal Matrix Composites Reinforced by Cu Coated SiC Particles



In order to improve the interfacial behavior between SiC and Al, a surface layer of Cu was coated on SiC particles. The influence of pH value on the coating process was analyzed. A powder metallurgy method was used to prepare the Al-based metal matrix composites (MMCs). SEM, XRD techniques were used to characterize the sintered compacts. It was found that the optimized pH value during the coating process was 1~2. The specimen showed the maximum density when sintered at 750oC. Inter-metallic compound of Al3.21Si0.47 was detected which contributed to the enhancement at the interface between SiC and Al. The hardness of the composites is improved to 90 MPa.




Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li






H. L. Wang et al., "Preparation of Al-Based Metal Matrix Composites Reinforced by Cu Coated SiC Particles", Key Engineering Materials, Vols. 280-283, pp. 1493-1496, 2005


February 2007




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