Crack propagation during Vickers indentation of zirconia ceramics

被引：28

作者：

Li, Le ^{[1
,2
]}

Wan, Linlin ^{[1
,2
]}

Zhou, Qiming ^{[1
,2
]}

机构：

[1] Hunan Prov Key Lab High Efficiency & Precis Machi, Xiangtan 411201, Hunan, Peoples R China

[2] Hunan Univ Sci & Technol, Inst Intelligent Mfg, Xiangtan 411201, Hunan, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2020年 / 46卷 / 13期

基金：

中国国家自然科学基金;

关键词：

Zirconia ceramics; Crack propagation; Vickers indentation; Critical load for median cracking; Fracture toughness; FRACTURE-TOUGHNESS; RADIAL CRACK; DAMAGE; PERFORMANCE; SIMULATION; INITIATION;

D O I：

10.1016/j.ceramint.2020.05.225

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：

A quarter finite element model of 3 mol% yttria stabilized tetragonal zirconia polycrystal (3Y-TZP) ceramics undergoing Vickers indentation was established to simulate the evolution of stress and the propagation of cracks inside a sample. The indentation experiment was carried out on the Micro Vickers Hardness Tester. The results of the geometric characteristic parameters, such as the indentation diagonal half-length a, the crack length c and the maximum indent depth h(m), from the indentation simulation and experiment were similar. The types of indentation cracks under various loads were determined according to the Lawn-Evan model, which exactly correspond to the simulation results. In addition, the propagation of indentation cracks was discussed based on the maximum principal stress contour plots at various stages, and the conclusions were verified by the indentation analysis model proposed by Yoffe. As a result, the model developed in this paper can be used in indentation studies to solve the related problem.

引用

页码：21311 / 21318

页数：8

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