In-situ TEM investigations on the microstructural evolution of SiC fibers under ion irradiation: Amorphization and grain growth

被引：29
作者：
Xu, Shanshan [1 ]
Zheng, Ce [1 ]
Bi, Yichun [1 ]
Mao, Qingping [1 ]
Qin, Hailong [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 | 2023年 / 43卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Silicon carbide; Fiber; Irradiation; In-situ TEM; Microstructure; SILICON-CARBIDE COMPOSITES; AMOSIC-3 SIC/SIC COMPOSITES; NEUTRON-IRRADIATION; DAMAGE EVOLUTION; CAVITY FORMATION; CASCADE OVERLAP; HELIUM; TEMPERATURE; HYDROGEN; BEHAVIOR;
D O I：
10.1016/j.jeurceramsoc.2022.11.029
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：
SiC/SiC composites are attractive candidates for many nuclear systems. As reinforcements, SiC fibers are critical to the in-service performance of composites. In this work, the temperature effects on the irradiation-induced microstructural evolution of Cansas-III SiC fibers were investigated using in-situ transmission electron micro-scopy (TEM). With in-situ 800 keV Kr ion irradiation, at room temperature (RT) the SiC fiber experienced heterogeneous amorphization and became completely amorphous at-2.6 dpa. Above the critical temperature of crystalline-to-amorphous (Tc), SiC fibers underwent a simultaneous process of carbon packet disappearance and nano-grain growth at 300 degrees C and 800 degrees C. Possible mechanisms were discussed.
引用
收藏
页码：1376 / 1384
页数：9
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