CREEP MECHANISM OF POLYCRYSTALLINE YTTRIUM-ALUMINUM-GARNET

被引：113

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.

引用

页码：1756 / 1759

页数：4

共 21 条

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