pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (14권5호 429-437)
A Study on Microstructures and Mechanical Properties of A356/coated SiC Composites Fabricated by Squeeze Casting
Squeeze Casting법에 의해 제조된 A356/coated SiC복합재료의 미세조직과 기계적 특성에 관한 연구
Kyung-Ku Lee, Doh-Jae Lee
Chonnam National University
Influence of interfacial structure between matrix and particle in A356/coated SiC composite fabricated by squeeze casting method was studied. Experimental variables are types of coated metallic film on SiC particles such as Cu, Ni-P, and applied pressure for squeeze casting. It was found that coating treatment on SiC particles improves the wetting of liquid A356 alloy on SiC particles. SiC particle distribution is very homogeneous in A356 matrix alloy which is fabricated by squeeze casting. Analysing the surface morphology of fractured A356/coated SiC, it was concluded that metallic thin film by coating treatment on SiC particle improves the interfacial bonding between particle and matrix, and so does on mechanical properties such as tensile strength. However, there was on significant difference in hardness between those composite made of as-received SiC particle and coated SiC particle.