High Volume Fraction SiC Particles Reinforced 2024Al Composite Prepared by Squeeze Casting

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Journal of Materials Engineering ›› 2008, Vol. 0 ›› Issue (11) : 59-62.

High Volume Fraction SiC Particles Reinforced 2024Al Composite Prepared by Squeeze Casting

YU Xiao-dong, WANG Yang-wei, WANG Fu-chi, ZOU You-rui, GAO Ju-bin

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Abstract

High volume fraction composites were produced by infiltrating liquid aluminium into preforms made by mixing and packing SiC particles with average diameters of 200 and 10μm.The maximum particle volume fraction 75%(volume fraction)was obtained for a mixture having 80%(mass fraction)of coarse particles.The influence of preform’s oxidation treatment on mechanical properties of the composites was studied.The results showed that the bending strength and fracture toughness of the composite which was fabricated from the un-oxidation treatment preform were 288MPa and 8.7MPa·m^1/2respectively.The relative density of the composite after oxidation treatment was lower,so as to the bending strength and toughness.But the oxidation treatment has little effect on the hardness of the composite,and the hardness of both composites was about HRA 70.The main failure mechanisms of the composite were the crack of the coarse particle and the debonding of the interface between fine particle and the matrix.

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metal-matrix composite / squeeze casting / oxidation treatment / mechanical property / failure mechanism

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YU Xiao-dong, WANG Yang-wei, WANG Fu-chi, ZOU You-rui, GAO Ju-bin. High Volume Fraction SiC Particles Reinforced 2024Al Composite Prepared by Squeeze Casting[J]. Journal of Materials Engineering, 2008, 0(11): 59-62

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