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Mo-Si-B Alloys: Developing a Revolutionary Turbine-Engine Material

Published online by Cambridge University Press:  31 January 2011

Dennis M. Dimiduk  and
John H. Perepezko
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Abstract

This article discusses three main points. First, ultrahigh-temperature materials offer a large return to the propulsion community and to the economy, but replacing Ni-based alloys is a very difficult problem for both technical and financial reasons. Second, the oxidation resistance of selected Mo-Si-B alloys and the prospects for combining this with useful structural properties are remarkable, given the nature of conventional Mo alloys; however, there are nagging issues associated with their low-temperature (∼700°C) behavior. Third, further advances in the processing of such materials, together with assessments of their affordability and reliability, are vital for achieving a successful engineering technology.

Keywords

aerospacehigh-temperature materialsintermetallic alloysmaterials developmentoxidationphase equilibriapowder metallurgystructural materialsturbine engines
Type
Research Article
Information
MRS Bulletin , Volume 28 , Issue 9: Ultrahigh-Temperature Materials for Jet Engines , September 2003 , pp. 639 - 645
Copyright
Copyright © Materials Research Society 2003

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