TiCp／W复合材料的制备工艺与力学性能

Processing and Mechanical Properties of 30vol%TiC\-p/W Composite

摘要:

研究了烧结温度，烧结保温时间和烧结压力等工艺参数对各３０％ＴｉＣ（体积分数，下同）颗粒的钨基复合材料的力学性能的影响，得到了制备３０％ＴｉＣｐ／Ｗ复合材料的优化的热压烧结工艺为：２０００℃，２０ＭＰａ压力下烧结６０ｍｉｎ，用优化工艺制备的３０％ＴｉＣｐ／Ｗ复合材料的高温强度比其室温强度要高，这种极好高温强度主要是由于Ｗ基体随温度上升发生了由脆性到塑性的转变，使ＴｉＣ颗粒的增强效果在高温得以充分发挥

Abstract:

The effects of sintering temperature,holding time and hot pressure on the density and mechanical properties of a hot pressed(PM)powder metallurgy 30vol%TiC\-p/W composite have been investigated. An optimum process for the preparation of 30vol%TiC\-p/W composite with higher strength and toughness has been devised.The 30vol%TiC\-p/W composite has excellent high temperature strength.This is attributed to a brittle ductile transision of the tungsten matrix combined with the strengthening effect of hard TiC particles in the W matrix.