SURFACE OXIDATION AND ITS EFFECT ON THE OBSERVED ELASTIC-MODULUS OF SIC WHISKER/AL2O3 COMPOSITES

被引：1
|
作者：
CHIU, CC [1 ]
CASE, ED [1 ]
CHIU, CCS [1 ]
机构：
[1] SUNY BINGHAMTON,DEPT CHEM,BINGHAMTON,NY 13901
来源：
JOURNAL OF COMPOSITE MATERIALS | 1994年 / 28卷 / 01期
关键词：
D O I：
10.1177/002199839402800101
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
This article presents an analysis of the 27 wt. % SiC whisker/Al2O3 composites exposed to air for periods up to 180 hours at 1100 degrees C to 1450 degrees C. Experimental results indicate that SiC whisker reacts with oxygen and alumina to produce a mullite-rich surface layer on tested composite specimens. The surface oxidation reaction degrades the observed elastic moduli of specimens. A theoretical analysis based on the Bernoulli-Euler beam equation shows that the surface layer has lower elastic modulus than the unreacted core.
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页码：2 / 21
页数：20
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