Thermophysiochemical Compatibility between Metal Carbides and Metal Matrices.
Final technical rept. 1 May 69-1 May 71,
MARTIN MARIETTA CORP ORLANDO FLA
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A method of fabricating carbide-metal interaction specimens was developed and is described. The diffusion bonded specimens were employed in the experimental evaluation of the compatibility of MC type carbides in high temperature metal matrices. This was accomplished in an effort to evaluate the stability of the MC type carbide in terms of its potential use as a diffusion barrier in a carbon filament reinforced high temperature metal matrix composite system. Six MC type carbides were chosen based on structural and thermodynamics consideration. These carbides were TiC, VC, HfC, TaC, NbC, and ZrC and were evaluated in pure Ni, pure Co, Ni-20Cr, Co-19.5Cr, IN 100, and MAR-M-509. The diffusion couples were evaluated after 25 hours at temperatures from 1000 to 1200C. Author
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