TERNARY PHASE EQUILIBRIA IN TRANSITION METAL-BORON-CARBON-SILICON SYSTEMS. PART I. BINARY SYSTEMS. VOLUME XII. REVISION OF THE VANADIUM-CARBON AND NIOBIUM-CARBON SYSTEMS.
AEROJET-GENERAL CORP SACRAMENTO CA MATERIALS RESEARCH LAB
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The binary systems vanadium-carbon and niobium-carbon were reinvestigated by means of X-ray, melting point, DTA, and metallographic techniques on chemically and thermally characterized specimens revised phase diagrams for both binary systems are given. In addition, recent investigations have also shown that some of the intermediate phases exhibit a more complex thermal behavior than previously anticipated. Thus, for example, the thermodynamic evaluation of the equilibria in ternary metal-carbon systems pointed to the existence of sublattice order-disorder transformations in the Me2C phases. These indications have, in the meantime, been confirmed experimentally by X ray and differential-thermoanalytical means.
- Physical Chemistry