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pISSN : 1598-706X / eISSN : 2288-8381


한국주조공학회지 (10권1호 43-49)

Effects of Cu and Mg on Wear Properties of SiC Particulate Reinforced Al-Si Metal Matrix Composites

SiC 입자강화 Al-Si 복합재료의 내마멸성에 미치는 Cu , Mg의 영향

Shang-Han Shim*, Yong-Keun Chung**, Ik-Min Park***

*Korea Heavy Industries Construction Co., **Pusan National Univrsity, ***Pusan National Univ.


The influences of Cu and Mg addition on wear properties of SiC particulate reinforced Al-Si metal(alloy) matrix composites were investigated. Metal matrix composites were prepared by combination of compocasting and hot pressing techniques. The main results obtained are as follows : 1) The composite with Mg addition exhibits letter wear resistance than that with Cu addition. It is considered that Mg addition improved wettability of matal matrix composite by the strong segregation to the SiC / Al matrix interface. 2) After homogenization treatment, it was found that the interfacial segregation of Mg was predominant, while that of Cu was not detected. 3) The SiC / Al-11Si eutectic composite exhibits better wear resistance than the SiC / Al-6Si hypoeutectic composite does. 4) It seems that the increase in the amount of Mg addition affects on the uniform dispersion of SiC particulates, on the refinement of microstructure and on age hardening and these effects cause wear resistance improvement of composites.