Abstract
In this paper, the SiC particle size and volume fraction were studied for the thermophysical properties of medium volume fraction SiCp / Al composites. The thermal expansion coefficients (CTEs) of 30%, 35% and 40%% SiCp / Al composites were prepared by powder metallurgy techniques from room temperature to 400 °C. The SiC particles have sizes of 3, 8, 15, 25 and 40 μm. The experimental results show that when the volume fraction of SiC particles is the same, the larger the particle size, the higher the CTE of the composite. As the volume fraction of SiC particles increases, the thermal expansion coefficient of the composite decreases. The Schapery model can be used as a good predictive model for medium volume fractional SiCp / Al composite CTE.
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