Creep of an Al2O3-SiC(whisker)-TiC(particle) composite

被引：0

作者：

de Arellano-Lopez, A.R. ^{[1
]}

Smirnov, B.I. ^{[1
]}

Goretta, K.C. ^{[1
]}

Routbort, J.L. ^{[1
]}

机构：

[1] Universidad de Sevilla, Seville, Spain

来源：

Materials Science and Engineering A | 1998年 / A252卷 / 01期

关键词：

Activation energy - Alumina - Creep - Crystal microstructure - Crystal whiskers - Diffusion in solids - Grain boundaries - Machining - Particles (particulate matter) - Silicon carbide - Stress analysis - Titanium carbide;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Compressive creep of an electrodischarge-machinable composite, Al2O3/30.9 vol.%. SiC-whiskers/23 vol.% TiC-particles, was studied at 1350-1458 °C in inert atmospheres. The microstructure of the deformed specimens was analyzed by scanning and transmission electron microscopy. At stresses below 80 MPa, partially unaccommodated grain-boundary sliding was the rate-controlling mechanism for creep, with a stress exponent of approximately 1 and an activation energy of approximately 470 kJ mol-1. Damage accumulated at stresses above 80 MPa as a consequence of the insufficient diffusional transport of matter. This damage was responsible for an increased stress exponent.

引用

页码：93 / 97

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