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High Temperature Oxidation Behavior of Strucflural Siucides

Published online by Cambridge University Press:  25 February 2011

C. E. Ramberg ,
P. Beatrice ,
K. Kurokawa  and
W. L. Worrell
C. E. Ramberg
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104
P. Beatrice
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104
K. Kurokawa
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104
W. L. Worrell
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104
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Abstract

The factors which control the formation of a protective silica (SiO2) layer on structural silicides at high temperature are summarized. The thermodynamic and kinetic conditions under which both silica and a metal oxide can form are also described. Molybdenum disilicide (MoSi2) forms highly protective silica scales and has the best oxidation resistance at high temperatures. Although the preparation method has little influence, the heating rate and the structure of the silica layer have significant effects on the oxidation behavior of MoSi2.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 322: Symposium F – High-Temperature Silicides and Refractory Alloys , 1993 , 243
Copyright
Copyright © Materials Research Society 1994

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