Comment on the role of intragranular dislocations in superplastic yttria-stabilized zirconia

被引：23
作者：
Balasubramanian, N
Langdon, TG [1 ]
机构：
[1] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA
[2] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA
来源：
SCRIPTA MATERIALIA | 2003年 / 48卷 / 05期
关键词：
ceramics; creep; high-temperature mechanical properties; superplasticity; yttria-stabilized zirconia;
D O I：
10.1016/S1359-6462(02)00471-2
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
It is shown by analysis, including through the incorporation of dislocation pile-ups, that the intragranular movement of dislocations plays little or no significant role in the deformation of high purity yttria-stabilized zirconia when testing at 1673 K at stresses below similar to100 MPa. It is proposed instead that deformation occurs through interface-controlled Coble diffusion creep. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：599 / 604
页数：6
相关论文
共 32 条
[1]   INTERFACE CONTROLLED DIFFUSIONAL CREEP [J].
ARZT, E ;
ASHBY, MF ;
VERRALL, RA .
ACTA METALLURGICA, 1983, 31 (12) :1977-1989
[2]   DEFECT FORMATION DURING PLASTIC-DEFORMATION OF Y2O3-PARTIALLY-STABILIZED ZRO2 SINGLE-CRYSTALS [J].
BAITHER, D ;
BAUFELD, B ;
MESSERSCHMIDT, U .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1995, 78 (05) :1375-1379
[3]   An examination of the flow process in superplastic yttria-stabilized tetragonal zirconia [J].
Berbon, MZ ;
Langdon, TG .
ACTA MATERIALIA, 1999, 47 (08) :2485-2495
[4]   Experimental evidence for diffusion creep in the superplastic 3 mol% yttria-stabilized tetragonal zirconia [J].
Charit, I ;
Chokshi, AH .
ACTA MATERIALIA, 2001, 49 (12) :2239-2249
[5]  
ESHELBY JD, 1951, PHILOS MAG, V42, P351
[6]   THE ROLE OF MATRIX DISLOCATIONS IN THE SUPERPLASTIC DEFORMATION OF A COPPER ALLOY [J].
FALK, LKL ;
HOWELL, PR ;
DUNLOP, GL ;
LANGDON, TG .
ACTA METALLURGICA, 1986, 34 (07) :1203-1214
[7]  
Friedel J., 1964, Dislocations, DOI DOI 10.1016/C2013-0-02250-5
[8]   TEMPERATURE-DEPENDENCE OF THE ELASTIC-MODULI, DILATIONAL AND SHEAR INTERNAL FRICTIONS AND ACOUSTIC-WAVE VELOCITY FOR ALUMINA, (Y)TZP AND BETA'-SIALON CERAMICS [J].
FUKUHARA, M ;
YAMAUCHI, I .
JOURNAL OF MATERIALS SCIENCE, 1993, 28 (17) :4681-4688
[9]  
GOMEZGRACIA D, 1990, J AM CERAM SOC, V73, P2452
[10]   Elastic constants of zirconia single crystals determined by X-ray measurements for polycrystals [J].
Hayakawa, M ;
Miyauchi, H ;
Ikegami, A ;
Nishida, M .
MATERIALS TRANSACTIONS JIM, 1998, 39 (02) :268-274
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