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In situ high pressure synthesis of cBN-based composites

    https://doi.org/10.1142/S1793604714500404Cited by:7 (Source: Crossref)

    Vickers hardness, phase combination, elastic modulus and cutting performance of the cubic boron nitride (cBN) based composites with different cBN weight ratios sintered at high pressure and high temperature were investigated. During high-pressure sintering, reactions occurred between cBN and Ti3SiC2, then new compounds, TiB2, C0.7N0.3Ti, SiC and SiB4 were formed, and no hBN phase was observed. Bulk modulus and hardness of the cBN composites decreased with increasing Ti3SiC2 contents in raw mixture, and the highest hardness of 35.9 GPa was achieved for 95 wt.% cBN–5 wt.% Ti3SiC2 composition specimen sintered at 1600°C. In addition, the present cBN-based composites exhibited good cutting performance.