Mechanical properties of Ce0.9Gd0.1O2-x and Ce0.9Gd0.1O2-x+Al2O3 composites

被引：0
|
作者：
Routbort, JL [1 ]
Goretta, KC [1 ]
Doshi, R [1 ]
Richards, VL [1 ]
Krumpelt, M [1 ]
Wolfenstine, J [1 ]
de Arellano-López, AR [1 ]
机构：
[1] Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA
来源：
22ND ANNUAL CONFERENCE ON COMPOSITES, ADVANCED CERAMICS, MATERIALS, AND STRUCTURES: A | 1998年 / 19卷 / 03期
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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 room-temperature elastic moduli, fracture strength, and fracture toughness of dense, fine-grained, pure Ce0.9Gd0.1O1.95 and composites containing 1.3 and 9.1 wt.% Al2O3 were investigated. Addition of 9.1 wt.% Al2O3 to Ce0.9Gd0.1O1.95 changed the fracture mode from intergranular to transgranular and increased room-temperature fracture strength from 65 to 125 MPa and fracture toughness from 1.3 to 1.6 MPam(1/2). In addition, steady-state compressive creep was measured for Ce0.9Gd0.1O1.95 and the Ce0.9Gd0.1O2-x + 9.1 wt.% Al2O3 composite. The stress exponent approximate to 1.3 and the activation energy approximate to 480 kJ/mole for Ce0.9Gd0.1O1.95 suggested diffusional flow controlled by the cations. There was no difference in creep rate between Ce0.9Gd0.1O2-x and the composite.
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页码：189 / 196
页数：8
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