Fabrication of Nanosized Tungsten Carbide Ceramics by Reactive Spark Plasma Sintering

被引：18
|
作者：
Sun, Shi-Kuan [1 ,2 ]
Kan, Yan-Mei [1 ]
Zhang, Guo-Jun [1 ]
机构：
[1] Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 200049, Peoples R China
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2011年 / 94卷 / 10期
基金：
中国国家自然科学基金;
关键词：
BINDERLESS WC; POWDER; CARBURIZATION; CONSOLIDATION;
D O I：
10.1111/j.1551-2916.2011.04813.x
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Binderless tungsten carbide ceramics were produced by reactive spark plasma sintering, using tungsten nitride and carbon black as starting materials. The phase and microstructure evolution during the sintering process was investigated. It was found that the tungsten nitride decomposed into nano tungsten with a particle size of about 25 nm firstly, and then reacted with carbon black to form carbides. Due to the high activity of the in situ formed carbides, samples could be densified at a temperature as low as 1350 degrees C. The bulk carbides possessed an average grain size of 270 nm and Vickers' hardness of 25.4 GPa.
引用
收藏
页码：3230 / 3233
页数：4
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