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niobium-matrix-composite high-temperature turbine bladesHigh-temperture composite-material turbine blades comprising mainly niobium matrices reinforced with refractory-material fibers being developed. Of refractory fibrous materials investigated, FP-AL(2)0(3), tungsten, and polymer-based SiC fibers most promising. Blade of this type hollow and formed in nearly net shape by wrapping mesh of reinforcing refractory fibers around molybdenum mandrel, then using thermal-gradient chemical-vapor infiltration (CVI) to fill interstices with niobium. CVI process controllable and repeatable, and kinetics of both deposition and infiltration well understood.
Document ID
19950065506
Document Type
Other - NASA Tech Brief
Authors
Kaplan, Richard B.
(Ultramet)
Tuffias, Robert H.
(Ultramet)
La Ferla, Raffaele
(Ultramet)
Heng, Sangvavann
(Ultramet)
Harding, John T.
(Ultramet)
Date Acquired
August 17, 2013
Publication Date
July 1, 1995
Publication Information
Publication: NASA Tech Briefs
Volume: 19
Issue: 7
ISSN: 0145-319X
Subject Category
FABRICATION TECHNOLOGY
Report/Patent Number
LEW-15542
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.