【摘要】 本文研究了机械合金化制备的纳米晶WC 10Co复合粉末的真空烧结特征 ,分析了孔隙度、显微硬度随绕结时间延长和烧结温度升高的变化规律 ,考察了一种新型抑制剂的作用。结果表明 :在 132 5℃ / 15min的烧结条件下 ,样品的相对密度达到了 98%以上 ;烧结样品的显微硬度随着烧结时间的延长和烧结温度的升高先增加后降低 ,并且在 132 5℃ / 15min的条件下其硬度为 2 2 95MPa ;新型抑制剂A既有利于晶粒长大的控制 ,同时又有利于材料致密化的进行 ,显著地提高了合金的性能。更多还原

【Abstract】 Vaccum sintering of mechanically synthesized nano-grained WC-10Co was investigated,the dependence of porosity/microhardness on sintering time/temperature was analysed,and the effect of a new inhibitor was evaluated.The result shows that the relative density of 98 % can be achievedly,sintering at 1 325 ℃ for 15 min.With the increase of sintering time or temperature,the microhardness is first increased and then decreased,with the highest microhardness of 2 295 MPa,The new inhibitor can restrain the grain growth and promote the densification.更多还原