Processing and Properties of Particulate Composites from Coated Powders

Abstract

A method is described for sintering of highly loaded (≤20 vol%) alumina matrix/silicon carbide whisker or platelet composites to closed porosity. The method uses controlled heterogeneous precipitation in a suspension of whiskers or platelets. The suspension‐coated particles are calcined to produce a free‐flowing composite powder which can be hot‐pressed or free‐sintered to high density. The results of consolidation and mechanical property testing are reported.