Investigation on the microcrcaks strengthening effect in the damage behavior of Al2TiO5 flexible ceramics based on the AE

被引：7

作者：

Shan, Qingliang ^{[1
]}

Ma, Qian ^{[1
]}

Chen, Changrong ^{[1
]}

Xu, Qiankun ^{[1
]}

Xue, Yudong ^{[2
]}

Xiong, Hao ^{[1
]}

Wang, Yewei ^{[1
]}

Zhou, Yuqian ^{[1
]}

Shui, Anze ^{[1
]}

机构：

[1] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Super Ne M, 1295 Dingxi Rd, Shanghai 200050, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2022年 / 48卷 / 03期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Flexible ceramics; Strength; Damage; Crack branching; DEPENDENT MATRIX CRACKING; ALUMINUM TITANATE; FRACTURE-TOUGHNESS; ACOUSTIC-EMISSION; MICROSTRUCTURE; DEFORMATION; COMPOSITES; MODES;

D O I：

10.1016/j.ceramint.2021.10.173

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：

In this study, the effect of microcrcaks strengthening on damage evolution of Al2TiO5 (AT) flexible ceramics was investigated by acoustic emission (AE). Results reveal that with increasing content of ZrO2, the strength of AT flexible ceramics improves gradually and the strain increases at first then decreases. When the content of ZrO2 is 12% and 8%, the strength and strain at maximum stress are increased by 154.92% and 38.27%, respectively. In addition, thanks to the "strengthening effect" of ZrTiO4 on grain boundary microcracks, the damage development thresholds (sigma(min) and sigma(onset)), elastic modulus and fracture toughness of AT flexible ceramics modified with ZrO2 are significantly improved. Moreover, the visible transverse cracks and matrix shedding in ATZ-0 are the most, but the cumulative AE damage events in ATZ-8 and ATZ-4 are more than ATZ-0 at late stage, for which the fracture of ZrTiO4 glass phase and crack branching induced by ZrTiO4 should be responsible.

引用

页码：3875 / 3883

页数：9

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