HIGH-TEMPERATURE CREEP OF YTTRIA-STABILIZED ZIRCONIA SINGLE-CRYSTALS

被引：62

作者：

MARTINEZFERNANDEZ, J ^{[1
]}

JIMENEZMELENDO, M ^{[1
]}

DOMINGUEZRODRIGUEZ, A ^{[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 | 1990年 / 73卷 / 08期

关键词：

creep; diffusion; high temperature; single crystals; zirconia;

D O I：

10.1111/j.1151-2916.1990.tb07612.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：

Creep of 9.4‐mol%‐Y2O3‐stabilized cubic ZrO2 has been studied between 1300° and 1550°C. Conventional power‐law creep (stress exponent n∼ 4.5) is found at the higher temperatures, with an activation energy (∼6 eV) corresponding to cation diffusion. Transition to a different creep mechanism occurs at the lower temperatures, as indicated by higher values of the stress exponent (n∼ 7) and an activation energy (∼7.5 eV) higher than that for cation self‐diffusion. The lower‐temperature behavior is caused by a competition between cross‐slip‐controlled and recovery‐controlled creep. Consideration of all the creep and diffusion data now available suggests that the rate‐controlling high‐temperature mass transport in Y2O3‐stabilized ZrO2 can be described by D= 10−3 exp(‐5.0 eV/kT) m2·s−1. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：2452 / 2456

页数：5

共 27 条

[1]

BRETHEAU T, 1979, ADV PHYS, V28, P835, DOI 10.1080/00018737900101455

[2]

CABRERACANO J, 1982, PHILOS MAG A, V46, P397, DOI 10.1080/01418618208239567

[3]

CANNON WR, 1983, J MATER SCI, V18, P1, DOI 10.1007/BF00543808

[4]

CAWLEY JD, UNPUB

[5]

Cheong D., UNPUB

[6] 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

[7]

CHEONG DS, 1989, THESIS CASE W RESERV

[8]

CLAUSSEN N, 1984, ADV CERAMICS, V12

[9] DIFFUSIONAL CREEP AND KINETIC DEMIXING IN YTTRIA-STABILIZED ZIRCONIA [J].

DIMOS, D ;

KOHLSTEDT, DL .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1987, 70 (08) :531-536

[10]

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

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