Abstract
W–Cu functionally graded material (FGM, 75wt%W+25wt%Cu—40wt%W+60wt%Cu) has been prepared by a method of high-gravity combustion synthesis and melt-infiltration in a short time (∼5min). The infiltration mechanism in the high-gravity field was investigated. The W–Cu FGM showed an overall relative density of∼97% and gradually-varying properties in terms of density, micro hardness, coefficient of thermal expansion. Especially, the W–Cu FGM exhibited a coefficient of thermal expansion between those of W and Cu, and thus could be used as a transition layer between W and Cu to relax the thermal stresses.
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