Microstructural analysis of isothermally exposed Ti/SiC metal matrix composites
- 64 Downloads
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.
KeywordsPolymer Electron Microscopy Titanium Porosity Transmission Electron Microscopy
Unable to display preview. Download preview PDF.
- 1.R. Kieschke, R. Somekh and T. W. Clyne, “Proceedings of the 3rd European Conference on Composite Materials” edited by A. R. Bunsell, P. Lamicq and A. Massiah, Bordeaux 1989 (Elsevier, London, 1989) p. 265.Google Scholar
- 2.C. G. Rhodes and R. A. Spurling, ASTM STP 864 (ASTM, Philadelphia, PA, 1985) p. 585.Google Scholar
- 5.D. B. Gundel and F. E. Wawner, in “14th Annual Conference on Composite Materials and Advanced Structures”, January 1990, Cocoa Beach, FL.Google Scholar
- 6.B. A. Lerch and D. R. Hull, NASA Tech. Mem., TM-100938, 1988.Google Scholar
- 7.I. W. Hall, J.-L. Lirn and J. Rizza, J. Mater. Sci. Lett., 10 (1991) 236.Google Scholar
- 9.J. L. Murray (ed.), “Binary Phase Diagrams of Ti Alloys” (ASM International, Metals Park, OH, 1987).Google Scholar
- 12.E. Heikinheimo, J. Kivilahti and M. Pajunen, in “Microbeam Analysis”, edited by D. E. Newbury (San Francisco Press, CA, 1988) p. 509.Google Scholar