CRACK SHIELDING IN CERIA-PARTIALLY-STABILIZED ZIRCONIA

被引：25

作者：

MARSHALL, DB

机构：

[1] Rockwell International Science Center, Thousand Oaks, California

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 10期

关键词：

cerium; fracture toughness; shielding; tetragonal zirconia polycrystals; transformations;

D O I：

10.1111/j.1151-2916.1990.tb06732.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 crack tip shielding stress intensity factor has been calculated for several elongated transformation zone shapes observed in high‐toughness ceria‐zirconia ceramics. The results show that the measured increases in fracture toughness of these materials are consistent with the crack tip shielding mechanism, to which the toughening of other zirconia ceramics has been attributed. Moreover, the presence of a very elongated zone ahead of a steady‐state crack is shown to decrease the degree of shielding compared with that of a zone with semicircular frontal shape and equivalent width by a factor of about 2. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

收藏

页码：3119 / 3121

页数：3

相关论文

共 14 条

[1] METASTABILITY OF THE MARTENSITIC-TRANSFORMATION IN A 12 MOL-PERCENT CERIA ZIRCONIA ALLOY .1. DEFORMATION AND FRACTURE OBSERVATIONS [J].

HANNINK, RHJ ;

SWAIN, MV .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1989, 72 (01) :90-98

[2] ON THE THERMOELASTIC MARTENSITIC-TRANSFORMATION IN TETRAGONAL ZIRCONIA [J].

HEUER, AH ;

RUHLE, M ;

MARSHALL, DB .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1990, 73 (04) :1084-1093

[3] CRACK RESISTANCE CURVES IN MAGNESIA-PARTIALLY-STABILIZED ZIRCONIA [J].

MARSHALL, DB ;

SWAIN, MV .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1988, 71 (06) :399-407

[4] CRACK-TIP TRANSFORMATION ZONES IN TOUGHENED ZIRCONIA [J].

MARSHALL, DB ;

SHAW, MC ;

DAUSKARDT, RH ;

RITCHIE, RO ;

READEY, MJ ;

HEUER, AH .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1990, 73 (09) :2659-2666

[5]

Marshall DB., 1983, FRACTURE MECHANICS C, V6, P289

[6] MECHANICS OF TRANSFORMATION-TOUGHENING IN BRITTLE MATERIALS [J].

MCMEEKING, RM ;

EVANS, AG .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1982, 65 (05) :242-246

[7] TRANSFORMATION PLASTICITY OF CEO2-STABILIZED TETRAGONAL ZIRCONIA POLYCRYSTALS .2. PSEUDOELASTICITY AND SHAPE MEMORY EFFECT [J].

REYESMOREL, PE ;

CHERNG, JS ;

CHEN, IW .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1988, 71 (08) :648-657

[8] TRANSFORMATION PLASTICITY OF CEO2-STABILIZED TETRAGONAL ZIRCONIA POLYCRYSTALS .1. STRESS ASSISTANCE AND AUTO-CATALYSIS [J].

REYESMOREL, PE ;

CHEN, IW .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1988, 71 (05) :343-353

[9] TRANSFORMATION ZONE SHAPE IN CERIA PARTIALLY-STABILIZED ZIRCONIA [J].

ROSE, LRF ;

SWAIN, MV .

ACTA METALLURGICA, 1988, 36 (04) :955-962

[10] POSTSINTERING HOT ISOSTATIC PRESSING OF CERIA-DOPED TETRAGONAL ZIRCONIA ALUMINA COMPOSITES IN AN ARGON-OXYGEN GAS ATMOSPHERE [J].

SATO, T ;

ENDO, T ;

SHIMADA, M .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1989, 72 (05) :761-764