Mechanical Properties of Aluminum-Graphite Composites Prepared by Liquid Phase Hot Pressing

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Abstract
A continuous liquid metal infiltration process has recently been developed for making aluminum-graphite composite wire from commercially available multifiber graphite yarns. Composite specimens have been successfully fabricated by hot pressing the composite wire. The longitudinal properties of both the composite wire and hot pressed specimens approximated rule of mixtures behavior, but the transverse tensile and compressive strengths of the specimens were lower than expected. Examination of the microstructure indicates that better transverse and compressive strengths may be achieved through refinement of the matrix grain size, elimination of continuous networks of intermetallic compounds in the matrix, and homogenization of the matrix alloy constituents.

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