Oxidation features of SiOC/MoSi2 composite at low temperatures

被引：15
|
作者：
Lee, DB [1 ]
机构：
[1] Sungkyunkwan Univ, Dept Adv Mat Engn, Suwon 440746, South Korea
来源：
METALS AND MATERIALS INTERNATIONAL | 2004年 / 10卷 / 02期
关键词：
SiOC; MoSi2; SiO2; oxidation; pesting;
D O I：
10.1007/BF03027317
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation behavior of SiOC containing dispersed MoSi2 particles was studied. An SiOC/MoSi2 composite was prepared by converting polymethylsiloxane into SiOC via pyrolysis after mixing MoSi2 particles. The SiOC matrix phase oxidized to SiO2, and MoSi2 particles oxidized to SiO2 and MoO3. The composite displayed superior oxidation resistance at 1100degreesC, because a thin SiO2 layer formed on the surface deterred the formation of highly volatile MoO3. However, accelerated oxidation occurred between 400 and 500degreesC owing to the concurrent formation of SiO2 and MoO3, which led to porous, nonprotective scale formation.
引用
收藏
页码：143 / 147
页数：5
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