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- Title
Optimizaton of Mo-Si-B Intermetallic Alloys.
- Authors
Schneibel, J. H.; Tortorelli, P. F.; Ritchie, R. O.; Kruzic, J. J.
- 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.
- Subjects
INTERMETALLIC compounds; MOLYBDENUM; IRON-molybdenum alloys; HIGH temperatures; OXIDATION
- Publication
Metallurgical & Materials Transactions. Part A, 2005, Vol 36, Issue 3, p525
- ISSN
1073-5623
- Publication type
Article
- DOI
10.1007/s11661-005-0166-4