Effects of microwave sintering temperature and soaking time on microstructure of WC-8Co

被引：31
作者：
Bao, Rui [1 ]
Yi, Jian-hong [1 ,2 ]
Peng, Yuan-dong [1 ]
Zhang, Hao-ze [1 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[2] Kunming Univ Sci & Technol, Sch Mat Sci & Engn, Kunming 650093, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2013年 / 23卷 / 02期
基金：
中国国家自然科学基金;
关键词：
tungsten carbide; microwave sintering; cobalt binder; microstructure; grain size; WC-CO COMPOSITE; MECHANICAL-PROPERTIES; TUNGSTEN CARBIDE; GRAIN-GROWTH; POWDER;
D O I：
10.1016/S1003-6326(13)62472-3
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
WC-8Co cemented carbide samples were processed via microwave irradiation in a 2.45 GHz, high-power multi-mode microwave cavity. The densification of the compacts and the microstructures of the prepared alloys were studied. The results demonstrate that the liquid phase is formed around 1300 degrees C and nearly full densification is obtained at 1450 degrees C for 5 min via microwave irradiation. The microstructures of microwave sintered samples have finer and more uniform WC grains than those of vacuum sintered samples. Besides, the WC grain size and distribution are only decided by the sintering temperature. Holding time has negligible effects on them. No matter how holding time is, the mean grain size is 2.7 mu m when the sintering temperature is kept at 1450 degrees C.
引用
收藏
页码：372 / 376
页数：5
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