TEMPERATURE-DEPENDENCE OF HARDNESS IN YTTRIA-STABILIZED ZIRCONIA SINGLE-CRYSTALS

被引：57

作者：

MORSCHER, GN ^{[1
]}

PIROUZ, P ^{[1
]}

HEUER, AH ^{[1
]}

机构：

[1] CASE WESTERN RESERVE UNIV,DEPT MAT SCI & ENGN,CLEVELAND,OH 44106

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1991年 / 74卷 / 03期

关键词：

D O I：

10.1111/j.1151-2916.1991.tb04049.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：

The temperature dependence of hardness and microcracking in single-crystal 9.5-mol%-Y2O3-fully-stabilized cubic-ZrO2 was studied as a function of orientation. Crack lengths increased with increased temperature up to 500-degrees-C; above 800-degrees-C, no cracks were found, indicating an indentation brittle-to-ductile transition of approximately 800-degrees-C. The temperature dependence of hardness was reduced around 500-degrees-C. Etching studies to delineate the plastic zone around and below indents identified the operative slip systems. The role of dislocations and their interactions within the plastic zone on the hardness and indentation fracture behavior of cubic-ZrO2 are discussed.

引用

页码：491 / 500

页数：10

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