Studies on Properties of Al-Sip Composites Fabricated by Vacuum Pressure Infiltration Method

Author:

Zhang Qiguo1,Gu Mingyuan2

Affiliation:

1. State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200030, China,

2. State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200030, China

Abstract

High reinforcement content Al-Sip composites, free of porosity, have been fabricated by vacuum pressure infiltration technology. The properties and fracture behavior of the composites have been studied. Stress results in the brittle fracture of silicon particles. The cracks extend into the ductile matrix and lead to the final fracture of the composite. This explains the fracture behavior of the composite. The coefficient of thermal expansion (CTE) of the composites has been investigated by a high-precision thermomechanical analyzer. The CTEs were measured and compared with the predictions of three theoretical models and the experimental data agreed well with Turner’s model.

Publisher

SAGE Publications

Subject

Materials Chemistry,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites

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