大连理工大学主页平台管理系统付雪松 Microstructure and superplastic behavior of TiO2-doped Al2O3-ZrO2 (3Y) composite ceramics 中文主页

论文成果

Microstructure and superplastic behavior of TiO2-doped Al2O3-ZrO2 (3Y) composite ceramics: 点击次数：; 发布时间： 2019-03-09; 发布时间：2019-03-09; 论文类型：期刊论文; 发表时间：2012-09-30; 发表刊物：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; 收录刊物：Scopus、EI、SCIE; 卷号：554; 页面范围：6-11; ISSN号：0921-5093; 关键字：Al2O3-ZrO2 (3Y) ceramic; Superplastic compression; TiO2 dopants; Microstructure development; Deformation mechanism; 摘要：Compression deformation deformation behavior and mechanism of as-sintered Al2O3-ZrO2 (3Y) composite ceramics doped with four different amounts of TiO2 (0, 1, 4, and 8 wt.%, designated as 0T, 1T, 4T, and 8T) were systematically investigated in this work. It was found out that the strain rate significantly increased by doping TiO2 addition. The stress-jump deformation data showed that the strain rate of 8T was about two orders of magnitude higher than that of the undoped ceramic under the same flow stress. Then, the microstructures were examined. After deformation, texture was developed but its intensity decreases with increasing TiO2 concentration. Moreover, liquid phases (about 50-100 nm) were observed along the edge facets and at the junction pockets in deformed 4T and 8T specimens. Based on the microstructural features and deformation behavior, it is suggested that for 0T and 1T, the deformation mechanism was texture-controlled grain boundary sliding accompanied by diffusion; for 4T and 8T, it was grain boundary sliding accompanied by the liquid phases. (c) 2012 Elsevier B.V. All rights reserved.

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付雪松

同专业博导同专业硕导个人学术主页

副教授博士生导师硕士生导师

性别：男

毕业院校：大连理工大学

学位：博士

所在单位：材料科学与工程学院

学科：材料加工工程

办公地点：大连理工大学铸造中工程心

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