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Fibre-Matrix Reaction Zones in Model Silicon Carbide-Titanium Aluminide Metal-Matrix Composites

Published online by Cambridge University Press:  21 February 2011

D. R. Baker ,
P. J. Doorbar  and
M. H. Loretto
D. R. Baker
Affiliation:
School of Metallurgy and Materials Science, University of Birmingham, Birmingham B 15 2TT, UK
P. J. Doorbar
Affiliation:
Manufacturing Technology, Rolls-Royce plc, Derby DE2 8BJ, UK
M. H. Loretto
Affiliation:
IRC in Materials for High Performance Applications, University of Birmingham, Birmingham B15 2TT, UK
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Abstract

The reactions between coated SiC continuous fibres and TiAl, Ti3A1, or Ti3A1 + β matrices, have been investigated using optical metallography, scanning electron microscopy (SEM), and transmission electron microscopy (TEM), with chemical information obtained by energy dispersive x-ray analysis (EDX) and electron energy loss spectroscopy (EELS).

Similar sequences of phases were found in all the composites; carbides based on TiC and TixAIC (x=2,3) and titanium silicides based on Ti5Si3 forming in narrow bands outside of the complex carbides. The occurrence of individual phases can be related to published phase diagram information. However, the sequences in which the reaction products occur within the reaction zones cannot be fully rationalised from the present results.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 170: Symposium N – Interfaces in Composites , 1989 , 85
Copyright
Copyright © Materials Research Society 1990

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References

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