Microstructural analysis of isothermally exposed Ti/SiC metal matrix composites |
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Authors: | I. W. Hall J. -L. Lirn Y. Lepetitcorps K. Bilba |
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Affiliation: | (1) Materials Science Program, University of Delaware, 19716 Newark, DE, USA;(2) Laboratoire de Chimie du Solide du CNRS, Université de Bordeaux I, 33405 Talence cedex, France |
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Abstract: | Specimens of diffusion-bonded titanium metal matrix composites have been subjected to thermal exposure treatments and examined principally by transmission electron microscopy. The fibres investigated were SCS-6 and Sigma . The fibre/matrix reaction layers have been shown to consist of titanium carbide and two titanium silicides. The reaction proceeds by the initial formation of a layer of TiC followed by a layer of mixed silicides, Ti5Si4 and Ti5Si3. Extensive porosity is generated during the reaction and this prevents the formation of a completely protective interfacial layer. |
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