Crack-healing behavior of ZrO2/SiC composite ceramics and strength properties of crack-healing specimens

被引：12

作者：

Houjou, Keiji ^{[1
]}

Takahashi, Koji ^{[2
]}

机构：

[1] Oyama Natl Coll Technol, Dept Mech Engn, Oyama, Japan

[2] Yokohama Natl Univ, Dept Energy & Safety Engn, Yokohama, Kanagawa, Japan

来源：

INTERNATIONAL JOURNAL OF STRUCTURAL INTEGRITY | 2012年 / 3卷 / 01期

关键词：

Compositematerials; Ceramics; Heat treatment; ZrO2; ceramics; SiC composite; Crack healing; Fracture toughness; Transformation toughening;

D O I：

10.1108/17579861211209984

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Purpose - The purpose of this paper is to study the crack-healing mechanism of ZrO2/SiC composite ceramics which have a high crack-healing ability at low temperature. Design/methodology/approach - The effects of dispersed SiC and the environment on crack-healing behaviour were investigated. The fatigue strength of crack-healed specimens was also investigated. Findings - The main conclusions are that for crack-healing of ZrO2 ceramics, it is necessary to have both a SiC composite and an oxidative environment; and when ZrO2/SiC composite ceramics are heat-treated in air, a phase transformation attributable to the SiC composite results in crack-healing and improvement of fracture toughness and bending strength. Originality/value - An appropriate heat treatment for ZrO2/SiC composite caused not only crack-healing but also the improvement of fracture toughness, and created a multiplier effect on crack-healing, bending strength and fracture toughness.

引用

页码：41 / 52

页数：12

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