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

被引：14

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

页码：1376 / 1384

页数：9

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