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Phase Equilibria Investigations of Binary, Ternary, and Higher Order Systems. Part 3. Phase Equilibria Studies in the Nb-Ta-C System

Report Number: AFML TR 69-117 Part 3
Author: Booker, Phillip H.
Author: Rudy, Erwin
Corporate Author: Aerojet-General Corporation
Date of Publication: 1970-05
Pages: 68
Contract: F33615-67-C-1513
Project: None Given
AD Number: AD0709946

The solid state and solid-liquid equilibria of the Nb-Ta-C system was determined by melting point determinations, X-ray and chemical analysis, metallography, and differential thermal analysis for temperatures above 1500C. The ternary system has a complete solid solution of monocarbides and also of subcarbides if the differences in carbon atom ordering is disregarded. Eutectic troughs in both the metal-rich and carbon-rich regions of the ternary are present. Calculated tie-line distributions agree well with experimental results.

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