Abstract
TiC/W ultra-fine powders were produced by one-step activation and chemical reduction process. The powders were consolidated by spark plasma sintering (SPS) at 1800°C to suppress grain growth during sintering. The grain size, relative density and the Vicker hardness HV0.2 of the bulk sample fabricated by SPS were 3μm, 98.6% and 471, respectively. The reduced Young's elastic modulus of the sintered W–1wt.% TiC composites was 382.7GPa. As the temperature rises from room temperature (RT) to 1100K, the thermal conductivity of pure W and W–1wt.% TiC composites decreased with the same trend. However, the thermal conductivity of the samples was both above 120W/mK at RT.
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