Insights into the ternary eutectic microstructure formed in intercolony regions in Al2O3-ZrO2(Y2O3) system

被引：11
作者：
Fu, Lian-sheng [1 ]
Chen, Guo-qing [1 ]
Fu, Xue-song [1 ]
Zhou, Wen-long [1 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Key Lab Solidificat Control & Digital Preparat Te, Dalian, Peoples R China
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2019年 / 102卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Al2O3/ZrO2(Y2O3); eutectic ceramic; Scheil equation; segregation behavior; MECHANICAL-PROPERTIES; GROWTH; SOLIDIFICATION; COMPOSITES; MORPHOLOGY; CERAMICS;
D O I：
10.1111/jace.15941
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：
Al2O3/ZrO2(Y2O3) pseudo-binary eutectic melt may solidify in the dendritic form at the low G/v ratio (thermal gradient G divided by growth rate v) associated with the Y2O3 microsegregation along the monovariant line. Especially, in the system with high Y2O3 content (>= 4.5 mol%), an Al2O3/ZrO2/YAG ternary eutectic in situ microstructure growing with a "plane front" will appear at the boundaries of dendritic structures. The volume fraction of the ternary eutectic increases with the increase in Y2O3 content. It was found that the amount of ternary eutectic can be well predicted by the Scheil equation (or nonequilibrium lever rule).
引用
收藏
页码：498 / 507
页数：10
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