Local Deformation Characteristics of Al2O3/SiC Multiphase Ceramics Under Impact Loading

被引：0
|
作者：
Gao Y. [1 ]
Ge Y. [2 ]
Lu T. [3 ]
Cai X. [1 ]
Zhang H. [1 ]
机构：
[1] School of Aerospace Engineering, North University of China, Taiyuan
[2] State key laboratory of Explosive Science and technology, Beijing Institute of Technology, Beijing
[3] College of Aerospace Engineering, Chongqing University, Chongqing
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2023年 / 51卷 / 12期
关键词：
alumina/silicon carbide multiphase ceramics; fracture mechanism; mechanical property; microstructure; shock dynamics;
D O I：
10.14062/j.issn.0454-5648.20230158
中图分类号：
学科分类号：
摘要：
The macroscopic mechanical response and micro-fracture mechanism of Al2O3/SiC composite as a multiphase ceramic under impact loading were investigated. The dynamic strength and strain rate sensitivity were analyzed by load tests methods of one-dimensional stress wave and plane shock wave. The Hugoniot curve of high pressure and local deformation characteristics of material were determined at different stress modes. The results show that the micro-fracture mechanism of the multiphase ceramic differs with the macro-stress characteristics. The macro-deformation of the multiphase ceramic is mainly a brittle failure under impact loading. However, there are some local plastic deformation characteristics on the transcrystalline fracture of large grain and the intergranular fracture of small grain. The SiC particles as a second phase induce crack propagation at grain boundaries and within grains, which plays an important role in the redistribution of impact energy. © 2023 Chinese Ceramic Society. All rights reserved.
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页码：3114 / 3120
页数：6
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