MODIFICATION OF ALPHA-AL2O3 PLATELET/ZRO2 MATRIX INTERFACE BY EPITAXIAL-GROWTH OF BETA''-AL2O3 ON THE ALPHA-AL2O3

被引：6
作者：
HUANG, XN
KUO, CK
NICHOLSON, PS
机构：
[1] Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1995年 / 78卷 / 04期
关键词：
D O I：
10.1111/j.1151-2916.1995.tb08410.x
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：
An epitaxial beta-alumina crystal growth method was used to modify alpha-Al2O3 platelet surfaces before inclusion as a reinforcing phase in partially stabilized zirconia (3Y-TZP). The as-grown surface phase was Na-beta ''-Al2O3. This was converted to Ca-beta ''-Al2O3 by ion exchange, as the latter is more temperature-stable at composite sintering temperatures. The conditions of formation, thermal stability, and chemical compatibility of these interfacial phases were examined. alpha-Al2O3 platelets with Ca-beta ''-Al2O3 film were incorporated into 3Y-TZP. The beta ''-Al2O3/ZrO2 interface was found to promote platelet debonding and pullout, thus enhancing the alpha-Al2O3 platelet/crack interactions during the fracture process.
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页码：892 / 896
页数：5
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