Densification of aluminum nitride ceramics with CaF2 additive

被引：1
|
作者：
Xiong, Yan [1 ]
Fu, Zhengyi [1 ]
Wang, Hao [1 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synthesis & Proc, Wuhan 430070, Peoples R China
来源：
HIGH-PERFORMANCE CERAMICS V, PTS 1 AND 2 | 2008年 / 368-372卷
关键词：
AIN ceramics; CaF2; additive; densification;
D O I：
10.4028/www.scientific.net/KEM.368-372.970
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：
Effect of adding up to 5wt% CaF2 on the densification and microstructural development of hot pressed aluminum nitride (AlN) was investigated. SEM investigation showed that the grain size of the sintered sample decreases with the increasing content of CaF2. Secondary-phase evolution paths converge from CA6 to CA phase above 1650 degrees C. TEM micrographs showed that formed secondary phases could evaporate from sintered bodies at higher temperatures in the carbon-containing nitrogen atmosphere and the residuals were mainly distributed at triple grain junctions, keeping direct connections of AlN grains. Translucnet AlN ceramics were prepared using CaF2 additive sintered at 1850 degrees C for 5 h.
引用
收藏
页码：970 / 972
页数：3
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