Phase evolution in ultra-fine TiC0.7N0.3-based cermet during sintering
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Abstract
Abstract Ultra-fine TiC 0.7 N 0.3 -based cermet is prepared and the phase evolution and microstructure are studied by XRD and SEM. The results show that in ultra-fine cermet, solid state reactions take place more readily than in common cermets at 900 °C; liquid phase forms at about 1230 °C in ultra-fine cermets, which is at a lower temperature than what has been reported; denitridation occurs during sintering of both cermets in vacuum, and they had better be sintered in N 2 to preserve the C/N atomic ratio of TiC 0.7 N 0.3 .
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