详细信息

超细晶粒WC-Co硬质合金的收缩与晶粒长大  ( EI收录)  

Shrinkage and Grain Growth of Ultrafine Grained WC Co Cemented Carbides

文献类型:期刊文献

中文题名:超细晶粒WC-Co硬质合金的收缩与晶粒长大

英文题名:Shrinkage and Grain Growth of Ultrafine Grained WC Co Cemented Carbides

作者:刘兵海[1];张跃[2];欧阳世翕[3]

机构:[1]华东理工大学技术化学物理研究所,上海200237;[2]北京科技大学材料物理系,北京100083;[3]武汉工业大学材料复合新技术重点实验室,武汉430070

年份:1999

卷号:25

期号:5

起止页码:494

中文期刊名:华东理工大学学报(自然科学版)

外文期刊名:Journal of East China University of Science and Technology

收录:CSTPCD;;国家哲学社会科学学术期刊数据库;EI(收录号:2000045122576);Scopus;北大核心:【北大核心1996】;CSCD:【CSCD2011_2012】;

基金:国家自然科学基金

语种:中文

中文关键词:超细晶粒;硬质合金;复合烧结;收缩;钴;碳化钨

外文关键词:vacuum sintering; hot isostatic pressure sintering; ultrafine grained WC Co cemented carbides; local liquid sintering

摘要:采用复合烧结工艺(真空烧结+ 热等静压烧结)制备超细晶粒 W C Co 硬质合金,研究了烧结过程中的超细合金的收缩及晶粒长大行为。结果表明,在常规的固相烧结阶段,局部微区内的液相烧结使超细晶粒 W C Co 硬质合金的收缩及晶粒长大行为不同于普通晶粒硬质合金。在此阶段, W C 晶粒出现较严重的早期晶粒长大现象,导致合金的收缩占总体收缩量的 90% 以上。
The combined sintering process (vacuum sintering plus HIP sintering) was introduced for producing ultrafine grained WC Co cemented carbides. The shrinkage and densification of the compacts during the combined sintering were studied. The results show that, the high selfdiffusion activities of W and C atoms enable them to quickly dissolve into the cobalt phase, for which the local liquid sintering takes place beforehand. The local liquid sintering is intimately correlated with the rapid shrinkage of the compacts and the substantial WC grain growth during the vacuum sintering stage (i.e.solid state sintering stage).

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