放電焼結により作製した無コバルトWC焼結体上へのダイヤモンド合成

概要

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WC with different sintering density ratio has been sintered without binder by spark sintering process High-quality diamond film, which has higher nucleation density and smaller crystals compared to that on WC-Co, has been deposited on this WC substrate by micro-wave enhanced plasma CVD method The result of a comparison study convinces that the adhesion strength of diamond films on this cobaltless sintered WC is remarkably superior to that on WC-Co, which is believed to be improved as a result of the increasing diamond nucleation densitv. the enhanced bond between the substrate and the diamond film, and the improved match of thermal expansion coefficients caused by the absence of the fatal obstacle of cobalt. Moreover. the indentation test has been proved that lower sintering density of this sintered WC may result in an increased adhesion strength.
公益社団法人精密工学会の論文
1998-01-05