Optimizaton of Mo-Si-B intermetallic alloys

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)525-531
Journal / PublicationMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume36
Issue number3
Publication statusPublished - Mar 2005
Externally publishedYes

Abstract

Mo-Si-B intermetallics consisting of the phases Mo3Si and Mo5SiB2, and a molybdenum solid solution ("α-Mo"), have melting points on the order of 2000 °C. These alloys have potential as oxidation-resistant ultra-high-temperature structural materials. They can be designed with microstructures containing either individual α-Mo particles or a continuous α-Mo phase. A compilation of existing data shows that an increase in the volume fraction of the α-Mo phase increases the room-temperature fracture toughness at the expense of the oxidation resistance and the creep strength. If the α-Mo phase could be further ductilized, less α-Mo would be needed to achieve an adequate value of the fracture toughness, and the oxidation resistance would be improved. It is shown that microalloying of Mo-Si-B intermetallics with Zr and the addition of MgAl2O4 spinel particles to Mo both hold promise in this regard.

Citation Format(s)

Optimizaton of Mo-Si-B intermetallic alloys. / SCHNEIBEL, J.H.; RITCHIE, R.O.; KRUZIC, J.J. et al.
In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 36, No. 3, 03.2005, p. 525-531.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review