Effect of Matrix Particle Size on Densification Behavior, Microstructure, and Mechanical Properties of an Al/FMG/SiC Hybrid Composite

Abstract

Hybrid aluminum matrix composites reinforced with Fe-based metallic glass (FMG) and SiC particles were prepared using the spark plasma sintering (SPS) process, and the effect of matrix particle size on density, microstructure, and mechanical properties was investigated. The porosity content of the composites increased with increasing matrix particle size. Both reinforcing particles showed a more homogenous distribution in the matrix when smaller particles were used for the matrix of the composites. The phase properties and the stored dislocation density were not meaningfully affected by changing matrix particle size. The yield compressive strength and ductility of the composites decreased signi cantly with increasing particle size, so that the yield strength of the hybrid composite with a matrix particle size of 20 μm was about 80% higher than that of a similar composite with a matrix particle size of 63 μm.