Effect of low activation rare-earth oxides on sintering of β-SiC

被引：6
作者：
Xu, Dengzhou [1 ]
Zheng, Ce [1 ]
Wei, Chong [1 ]
Xu, Shanshan [1 ]
Bi, Yichun [1 ]
Li, Xiaoqiang [1 ]
机构：
[1] Northwestern Polytech Univ, Sci & Technol Thermo Struct Composite Mat Lab, Xian 710072, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2022年 / 42卷 / 15期
基金：
中国国家自然科学基金;
关键词：
Silicon carbide; Rare-earth oxide; Praseodymium oxide; Liquid phase sintering; Radiation stability; INTERGRANULAR PHASE CHEMISTRY; SILICON-CARBIDE CERAMICS; MICROSTRUCTURE; ADDITIVES;
D O I：
10.1016/j.jeurceramsoc.2022.08.008
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：
The feasibility of sintering beta-SiC at 1850 degrees C with using low-activation rare-earth oxides as sintering additives was studied. Thermodynamic calculation suggested that all five rare-earth oxides (Y2O3, Sc2O3, CeO2, La2O3, and Pr6O11) were suitable sintering additives. Comprehensive microstructure characterization further revealed that Pr6O11 was the most effective sintering additive as it suffered the least influence from the content effect. A mechanism based on liquid phase sintering was proposed based on microstructure observations. The radiation stability of sintered SiC was investigated as well. The intergranular phases (rare-earth oxides and silicates) and SiC grains remained after being irradiated to 17 dpa at 750 degrees C.
引用
收藏
页码：6802 / 6814
页数：13
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