大连理工大学主页平台管理系统付雪松 Studies on Dynamic Tribology Properties of Friction Materials by Using an Approximate In Situ Observation for Worn Surfaces 中文主页

论文成果

Microstructure and mechanical properties of Y2O3-doped melt-grown Al2O3-ZrO2 eutectic ceramic: 点击次数：; 发布时间： 2019-03-11; 发布时间：2019-03-11; 论文类型：期刊论文; 发表时间：2017-08-04; 发表刊物：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; 收录刊物：EI、SCIE、Scopus; 卷号：703; 页面范围：372-379; ISSN号：0921-5093; 关键字：Eutectic ceramic; Mechanical properties; Al2O3/ZrO2(Y2O3); Segregation behavior; 摘要：The microstructure and mechanical properties of the melt-grown Al2O3/ZrO2 eutectic bulks containing 0-12 mol % Y2O3 (with respect to zirconia) prepared at the low G/v ratio (thermal gradient G divided by growth rate v) were investigated. As Y2O3 content increases, except for the cellular to dendritic transition for the colony morphology, the average interphase spacing I in the colony decreases to a minimum (approximate to 1.1 mu m) at the 3 mol% Y2O3, and then increases slightly. It appears likely that with the Y2O3 content increasing the transport mechanism for dominating the crystal growth changed from heat conduction to chemical diffusion, which corresponds to the LGK (Lipton, Glicksman, and Kurz) model. The highest hardness (close to 18 GPa) was also found at the 3 mol% Y2O3. However, the fracture toughness, K-IC, estimated from the indentation method decreased with the increase of Y2O3 content.

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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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