Abstract
Stringent requirements of material quality in automotive and aerospace industries have necessitated the development of lightweight aluminum alloy matrix composites. In this study, the Al–Si alloy matrix-reinforced B4C particles are fabricated by squeeze casting process. The inherent fast heat transfer of the squeeze casting process permits only very short liquid metal–particle contact time with a greatly reduced risk of particle–matrix interaction. This makes squeeze casting process ideal for the manufacture of B4C-reinforced Al matrix composites. TiB2 was coated on the surface of the B4C particles to have higher wettability with aluminum. Experimental results show strong adhesion at the particle/matrix interface which improves load transfer, increases the yield strength and stiffness, and delays the onsets of particle/matrix decohesion.
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