Fabrication and oxidation behavior of LaB6-ZrB2 composites

被引：28
|
作者：
Gao, RL [1 ]
Min, GH [1 ]
Yu, HS [1 ]
Zheng, SQ [1 ]
Lu, QL [1 ]
Han, HD [1 ]
Wang, WT [1 ]
机构：
[1] Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2005年 / 31卷 / 01期
关键词：
hot pressing; sintering; LaB6-ZrB2; composites; oxidation behaviors;
D O I：
10.1016/j.ceramint.2004.02.006
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：
LaB6-ZrB2 cutectic composites were sintered by hot pressing. The oxidation behavior of LaB6-ZrB2 entectic composites was studied in the temperature range of 600-1300degreesC. It was shown that the sample weight increased with increasing oxidation temperature and prolonging holding time. The rate of weight change was described by k(p) = 6.24 x 10(-4) exp(-38, 940/RD g(2)/m(2) s, but it changed according to the change of oxidation time at 1200degreesC. Weight gain was evident in less than 1h, but it slowed down Subsequently due to the evaporation of B2O3. The rate of weight change increased abruptly at 1300degreesC. The oxidation resistance of LaB6-ZrB2 composites was higher than that of monolithic LaB6. (C) 2004 Elsevier Ltd and Techna S.r.l. All rights reserved.
引用
收藏
页码：15 / 19
页数：5
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