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含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。
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.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
1999年第3期171-175,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金
关键词
钨基
复合材料
制备工艺
力学性能
碳化钛
tungsten matrix composite,TiC particle,processing,mechanical property