EDP Sciences Journals List
Issue J. Phys. IV France
Volume 03, Number C9, Décembre 1993
Proceedings of the 3rd International Symposium on High Temperature Corrosion and Protection of Materials
Actes du 3ème Colloque International sur la Corrosion et la Protection des Matériaux à Haute Température
Page(s) C9-151 - C9-157
DOI http://dx.doi.org/10.1051/jp4:1993913

Proceedings of the 3rd International Symposium on High Temperature Corrosion and Protection of Materials
Actes du 3ème Colloque International sur la Corrosion et la Protection des Matériaux à Haute Température

J. Phys. IV France 03 (1993) C9-151-C9-157

DOI: 10.1051/jp4:1993913

Approaches to oxidation-resistant refractory metal alloys

I.G. Wright and V. Nagarajan

Battelle, 505 King Avenue, Columbus, Ohio 43201, U.S.A.


Abstract
The focus of the research reported here was on the design of high-temperature alloys which would form protective SiO2 and Al2O3 scales on exposure to high-temperature, oxidizing environments. One way to promote the growth of such scales is to incorporate sufficient amounts of Si or Al in the alloy substrate ; typically, additions of approximately 35 to 45 weight percent (all alloy compositions are given in weight percent unless explicitly stated otherwise) of Si or Al would be required to form the respective scales, in the absence of additional protective-scale-forming elements. At such levels of alloying additions, the formation of inter-metallic phases is likely, which may have undesirable features such as low melting temperatures or poor mechanical properties. The research described was an attempt to address these problems from a fundamentally different point of view, for Mo- and Nb-based alloys, through the use of a dispersed reservoir phase.



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