Hot-Pressed TiB2 Ceramics With B4C and C Additives

被引：2
|
作者：
Wang, Li [1 ]
Guo, Wei-Ming [2 ]
Li, Yao-Gang [1 ]
Zhang, Guo-Jun [2 ]
机构：
[1] Donghua Univ, Coll Mat Sci & Engn, Shanghai 200051, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
来源：
HIGH-PERFORMANCE CERAMICS VI | 2010年 / 434-435卷
关键词：
TiB2; B4C and C additives; Densification; Microstructure; TITANIUM DIBORIDE; SINTERING AID; MECHANICAL-PROPERTIES; BORON-CARBIDE; ZIRCONIUM DIBORIDE; DENSIFICATION; NITRIDE; CARBON; IRON;
D O I：
10.4028/www.scientific.net/KEM.434-435.182
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：
Effects of B4C and C additives on the densification behavior, phase composition, and microstructure of TiB2 ceramics were studied. The relative density of pure TiB2 ceramics by hot pressing at 2000 degrees C for 1 h was only 77.4%. With the introduction of B4C and C additives, the relative density increase to 97.4% and 98.1%, respectively. The great improvement on densification was due to the removal of surface oxides of TiB2 powders by reaction with B4C and C additives. Microstructure observation showed the addition of B4C led to some TiB2 grains abnormal growth (>10 mu m), whereas the addition of C produced a uniform and fine-grained microstructure.
引用
收藏
页码：182 / +
页数：2
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