Preparation of superfine-cemented carbide by spark plasma sintering

被引：0
|
作者：
Xie Y. [1 ]
Wang X. [1 ]
Chen L. [2 ]
Li X. [1 ]
Guo H. [1 ]
机构：
[1] School of Materials Science and Engineering, Shanghai University
[2] Shanghai Institute of Ceramics, Chinese Academy of Sciences
来源：
J Wuhan Univ Technol Mater Sci Ed | 2006年 / 1卷 / 42-45期
关键词：
Cemented carbide; Sintering mechanism; Spark plasma sintering; Superfine grain;
D O I：
10.1007/BF02861467
中图分类号：
学科分类号：
摘要：
92WC-8Co powder mixture with superfine-tungsten carbide was respectively sintered by spark plasma sintering (SPS) and sintering isostatic pressure (SIP). Complete dense samples with 200 nm WC grains and 94.2HRA hardness were prepared by spark plasma sintering at 1150°C and under 4.5 kN for 5 minutes, SIP was carried out at 1400°C for 30 minutes with a result of 300-400 nm WC grains and 93 HRA hardness. The results show that sintering temperature is greatly decreased by SPS, sintering time is largely shortened and WC grain growth is effectively retarded. Micropores and drawbacks in superfine-cemented carbide made by SPS are greatly declined, which is very useful to improving mechanical properties.
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页码：42 / 45
页数：3
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