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


한국주조공학회지 (20권1호 13-20)

Fabrication and Properties of Reaction Squeeze Cast (Al₂O₃+Si)/Mg Hybrid Metal Matrix Composites

반응용탕단조법에 의한 (Al₂O₃+Si)/Mg 하이브리드 금속복합재료의 제조 및 특성평가

Dong-Hyun Oh, Sang-Hyuk Jeon, lk-Min Park, Kyung-Mox Cho, il-Dong Choi*

Pusan National University, *Korea Maritime University


In the present study, (lo%Al2O3+5%Si)/A291 Mg hybrid composite was fabricated using the squeeze casting method. During squeeze casting, molten Mg was infiltrated into the preform of 10%A;O3+5%Si and reaction product of Mgsi intermetallic compound was formed by the reaction between molten Mg and Si powder. Microstmcture has been observed and mechanical properties were evaluated for the reaction squeeze cast (RSC) hybrid composite. It was found that Si powder totally reacted with molten Mg to form Mg2Si. Reinforcement (A1203) and the reaction product (Mgsi) are fairly uniformly distributed in Mg matrix for the squeeze cast hybrid composite. Mechanical properties were improved with hybridization of reinforcements, namely higher hardness and enhanced wear resistance comparing squeeze cast (l5%A;O3)/AZ91 Mg composite.