Preparation of TiB2-TiN and TiN-B powders and their processing

摘要

TiN and TiN-TiB_2 nanoparticles with crystallite size of TiN in the range of 27-38 nm and TiB_2 in the range of 55-90 nm have been prepared by thermal plasma technique. The prepared nanoparticles and mechanical mixture of TiN with amorphous boron have been densified by using spark plasma sintering and the microstracture and density of the samples were compared. The relative density of the samples with content of TiB_2 about 36 wt.% is in the range of 95.9-97.1% in dependence on the precursors. The higher relative density of the samples provided reactive sintering of TiN-B powder. The grain size of the composites in the range of 0.5-3 um testified that spark plasma sintering intensified the grain growth in despite of the short sintering time.