CREEP-BEHAVIOR OF SI3N4/Y2O3/AL2O3/AIN ALLOYS

被引：35

作者：

CRAMPON, J

DUCLOS, R

RAKOTOHARISOA, N

机构：

[1] Laboratoire de Structure et Propriétés de l'état Solide, URA CNRS 234, Bât C6, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq Cedex

来源：

JOURNAL OF MATERIALS SCIENCE | 1993年 / 28卷 / 04期

关键词：

D O I：

10.1007/BF00400873

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The compression creep behaviour of pressureless sintered Y2O3/Al2O3/AIN-doped Si3N4 was studied between 1473 and 1673 K, under stresses ranging from 100-300 MPa. Strain rate versus stress and temperature analysis give a stress exponent n congruent-to 1 and an activation energy Q = 860 kJ mol-1. Microstructural change was investigated by transmission electron microscopy. The observed strain whorls, the stress exponent and the activation energy are indicative of a solution-diffusion-precipitation accommodated grain-boundary sliding where the diffusion through the glass is rate controlling.

引用

页码：909 / 916

页数：8

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