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

共 29 条

[1] DISLOCATIONS AND BRITTLE FRACTURE IN ELEMENTAL AND COMPOUND SEMICONDUCTORS [J].

ABRAHAMS, MS ;

EKSTROM, L .

ACTA METALLURGICA, 1960, 8 (09) :654-662

[2]

AKIMUNE Y, 1988, SCI TECHNOLOGY ZIRCO, V24, P691

[3] A CRITICAL-EVALUATION OF INDENTATION TECHNIQUES FOR MEASURING FRACTURE-TOUGHNESS .1. DIRECT CRACK MEASUREMENTS [J].

ANSTIS, GR ;

CHANTIKUL, P ;

LAWN, BR ;

MARSHALL, DB .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1981, 64 (09) :533-538

[4] HIGH-TEMPERATURE PLASTIC-DEFORMATION OF Y2O3-STABILIZED ZRO2 SINGLE-CRYSTALS .2. ELECTRON-MICROSCOPY STUDIES OF DISLOCATION SUBSTRUCTURES [J].

CHEONG, DS ;

DOMINGUEZRODRIGUEZ, A ;

HEUER, AH .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1989, 60 (01) :123-138

[5]

CHEONG DS, IN PRESS PHILOS MAG

[6]

CORDIER P, UNPUB HIGH TEMPERATU

[7]

COTTRELL AH, 1958, T AM I MIN MET ENG, V212, P192

[8]

DOMINGUEZRODRIG.A, 1989, SURFACES INTERFACES, P761

[9] HIGH-TEMPERATURE PRECIPITATION HARDENING OF 2-PHASE Y2O3-PARTIALLY-STABILIZED ZRO2 SINGLE-CRYSTALS - A 1ST REPORT [J].

DOMINGUEZRODRIGUEZ, A ;

LANTERI, V ;

HEUER, AH .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1986, 69 (03) :285-287

[10]

DOMINGUEZRODRIGUEZ A, 1987, CRYST LATT DEF AMORP, V16, P117

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