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Microstructural Characterization of Al2O3/Gamma Titanium Aluminide Composites

Published online by Cambridge University Press:  15 February 2011

G. Das  and
S. Krishnamurthy
G. Das
Affiliation:
Metcut-Materials Research Group, Wright-Patterson AFB, OH. Now at Pratt & Whitney, P.O. Box 109600, West Palm Beach, Fl 33410-9600
S. Krishnamurthy
Affiliation:
Metcut-Materials Research Group, Wright-Patterson AFB, OH. Now at Universal Energy System, 4401 Dayton-Xenia Road, Dayton, Ohio 45432
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Abstract

Alumina (A12O3) fibers were incorporated into gamma titanium aluminide(TiAl) based powders by hot isostatic pressing (HIP'ing). The microstructure of as-HIP'd and heat treated composite specimens were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). TEM studies reveal the presence of an amorphous reaction zone at the fiber/matrix interface. Numerous dislocations, dipoles and loops as well as twins are observed in A12O3 fibers. In addition, it is determined that the fiber/matrix interface stability is significantly affected by the matrix microstructure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 273: Symposium Q – Intermetallic Matrix Composites II , 1992 , 93
Copyright
Copyright © Materials Research Society 1992

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References

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