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


(논문)연구논문

한국주조공학회지 (13권3호 238-247)

A Study on the Wear Characteristics of SiC Particle Dispersed Composites by Rheo-Compocasting Method

Rheo-compocasting법에 의한 SiC입자분산 복합재료의 마모특성에 관한 연구

Hyun-Man Kwak*, Chang-Ock Choi**

*Dongmyung Junior College, **Dong-A University

Abstract

Microstructure, hardness and wear characteristics of SiC_p/Al-6.5wt%Si-1.7wt%Mg alloy composites fabricated by the method of rheo-compocasting and hot pressing are investigated in this study. The dispersion of SiC particles in the composites is homogeneous and the hardness improves as additional amount increases. The wear amount of the matrix metal increases highly as wear rates increase, for the wear mechanism changes from adhesive wear to melt wear, and the matrix metal was coated on the surface of revolving disc and its weight increases. In the 5vol% composites, Fe is adhered on the surface of specimen by the projection of the dispersed hard SiC particles which have net-work structure and the coating layer is about 300μм. But in the composite more than 20vol%, the wear amount of composite decreases because the SiC particles which have superior hardness, wear resistance and heat resistance properties resist wear, the abrasive wear turn out predominant wear mechanism and so the wear amount of revolving disc increases.

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