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-tit anium boride composites that have been produced by transient plastic phase processing are presented. The composites produced are comprised of Ti3B4, T iB2, and TiCo0.65 at their equilibrium composition (34.5, 30.5, and 34.9 vo l%, respectively), and the Ti3B4 phase in these composites occurs either as equiaxed grains or as platelets, depending on the starting mixture composi tion, Measurements of the ambient- and high-temperature flexure strength an d fracture toughness, thermal shock susceptibility, oxidation resistance, a nd wear resistance of this class of composites are presented. The role of v arious microstructural parameters-such as the morphology of the Ti3B4 phase , the length scale of the microstructure, and the volume fraction of boride s-on these properties has been identified.