On the oxidation behaviour of MoSi2

被引：173

作者：

Liu, YQ

Shao, G ^{[1
]}

Tsakiropoulos, P

机构：

[1] Univ Surrey, Sch Mech & Mat Engn, Guildford GU2 7XH, Surrey, England

[2] Gen Res Inst NonFerrous Met, Res Ctr Phys Chem, Beijing 100088, Peoples R China

来源：

INTERMETALLICS | 2001年 / 9卷 / 02期

基金：

中国国家自然科学基金;

关键词：

molybdenum silicides; diffusion; oxidation; phase transformations; phase diagram prediction (including CALPHAD);

D O I：

10.1016/S0966-9795(00)00114-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The oxidation behaviour of MoSi2 has been analyzed on the basis of thermodynamics and kinetics. Thermodynamically speaking silica is in equilibrium with ally of the stable molybdenum silicides. At low temperatures, the limited bulk diffusion in MoSi2 makes it impossible to sustain a sufficient supply of silicon for the formation of a continuous silica layer. This leads to the simultaneous-oxidation of silicon and molybdenum, forming a scale of mixed oxides. The formation of molybdenum oxides leads to ruptures owing to the significant volume change and accelerates the oxidation, leading to the pest phenomenon. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：125 / 136

页数：12

共 80 条

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