CREEP MECHANISM OF POLYCRYSTALLINE YTTRIUM-ALUMINUM-GARNET

被引：115
作者：
PARTHASARATHY, TA
MAH, TI
KELLER, K
机构：
[1] Universal Energy Systems, Inc., Dayton, Ohio
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1992年 / 75卷 / 07期
关键词：
YTTRIUM ALUMINUM GARNET; POLYCRYSTALLINE MATERIALS; CREEP; MECHANISM; DIFFUSIVITY;
D O I：
10.1111/j.1151-2916.1992.tb07193.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 high-temperature deformation behavior of a fine-grained polycrystalline yttrium aluminum garnet (YAG) was studied in the temperature range of 1400-degrees to 1610-degrees-C using constant strain rate compression tests under strain rates ranging from 10(-5)/s to 10(-3)/s. The stress exponent of the creep rate, the activation energy in comparison with that for single-crystal YAG, and the grain size dependence suggest that Nabarro-Herring creep rate limited by the bulk diffusion of one of the cations (Y or Al) is the operative mechanism.
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页码：1756 / 1759
页数：4
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