MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Preparation, Properties and Microstructure of SiC Particle Reinforced Al–Si Matrix Composite
Shiming HaoJingpei XieAiqin WangMing Fang
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2014 Volume 55 Issue 5 Pages 750-753

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Abstract

The SiC particles reinforced Al–30Si matrix composite was fabricated by vacuum hot pressing techniques. Mechanical properties of the composite were measured, and the microstructure was observed using SEM, XRD, and TEM. The results show that SiC particles and Si particles were dispersed uniformly in the matrix, the interfaces of the SiC/Si, SiC/Al, and the Si/Al are good and did not find the formation of Al4C3; composites have a low coefficient of thermal expansion (10.4 × 10−6 K−1) and decent tensile strength (192 MPa). The analysis of the fractograph reveals the fracture mechanism of SiC particle reinforced Al–Si matrix composite. The fracture of composite is primarily dominated by the fracture of brittle Si/SiC particles and the subsequent link up of damage through the matrix.

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© 2014 The Japan Institute of Metals and Materials
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