Ambient- and High-Temperature Properties of Titanium Carbide-Titanium Boride Composites Fabricated by Transient Plastic Phase Processing

Ambient‐ and high‐temperature properties of a class of titanium carbide‐titanium boride composites that have been produced by transient plastic phase processing are presented. The composites produced are comprised of Ti3B4, TiB2, and TiC0.65 at their equilibrium composition (34.5, 30.5, and 34.9 vol%, respectively), and the Ti3B4 phase in these composites occurs either as equiaxed grains or as platelets, depending on the starting mixture composition. Measurements of the ambient‐ and high‐temperature flexure strength and fracture toughness, thermal shock susceptibility, oxidation resistance, and wear resistance of this class of composites are presented. The role of various microstructural parameters—such as the morphology of the Ti3B4 phase, the length scale of the microstructure, and the volume fraction of borides—on these properties has been identified.