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Evaluation of an Scs-6/Ti-22al-23nb “Orthorhombic” Composite

Published online by Cambridge University Press:  15 February 2011

P. R. Smith ,
J. A. Graves  and
C. G. Rhodes
P. R. Smith
Affiliation:
Materials Directorate, Wright Laboratory, Wright-Patterson AFB, OH 45433-6533
J. A. Graves
Affiliation:
Rockwell International Corp. Science Center, Thousand Oaks, CA. 91360-0085
C. G. Rhodes
Affiliation:
Rockwell International Corp. Science Center, Thousand Oaks, CA. 91360-0085
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Abstract

study was undertaken to examine the attributes of utilizing a high niobiumcontaining titanium aluminide (orthorhombic) composition, specifically Ti-22AI-23Nb (a%), for use as a matrix for a continuously reinforced metal matrix composite. Both unreinforced “neat” panels and 35v% 4-ply unidirectional ([0]4) SiC (SCS-6) panels were fabricated by HIP'ing using a foil / fiber / foil approach. The microstructure of these panels were examined via optical, scanning electron and transmission electron microscopy. Reaction zone kinetics including both the primary reaction product and any beta-depleted zone growth were determined at 982°C. Analytical electron microscopy was employed to identify fiber / matrix interfacial compounds as well as local phases and their associated chemistries. Preliminary mechanical properties were obtained which included: longitudinal and transverse tensile, matrix thermal stability, thermal fatigue, thermal mechanical fatigue and transverse composite creep. The results were compared with panels fabricated from the baseline matrix composition, Ti-24AI-11 Nb.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 273: Symposium Q – Intermetallic Matrix Composites II , 1992 , 43
Copyright
Copyright © Materials Research Society 1992

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References

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