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Research Study to Determine the Phase Equilibrium Relations of Selected Metal Carbides at High Temperatures.

AD608301

Publication Date	1964
Personal Author	Sara, R. V.; Lowell, C. E.
Page Count	2
Abstract	The work summarized in the report is the result of investigations of phase equilibria in the binary systems, tantalum-carbon, hafnium-carbon, and boron-carbon. A completed phase diagram which encompasses experimental results and considerations heretofore unreported in the literature, is presented for the hafnium-carbon system. A phase diagram for the tantalum-carbon system is included. Preliminary studies on the hafnium carbidetantalum carbide quasi-binary were limited to temperatures of 3700 C at which no liquid formation was evident. Results for the boron-carbon system depicting maximum boron solubility in the graphite lattice at and near the eutectic temperature of approximately 2390 C, are also included. (Author)
Keywords	CARBIDES TANTALUM COMPOUNDS HAFNIUM COMPOUNDS BORON COMPOUNDS PHASE STUDIES REFRACTORY MATERIALS METALLOGRAPHY X-RAY DIFFRACTION ANALYSIS CRYTAL LATTICES THERMODYNAMICS SOLID SOLUTIONS MICROSTRUCTURE BORON CARBIDES HAFNIUM CARBIDES TANTALUM CARBIDES
Corporate Authors	Union Carbide Corp Parma Ohio
Supplemental Notes	Legibility of this document is in part unsatisfactory. Reproduction has been made from best available copy.
Document Type	Technical Report
NTIS Issue Number	196501
Contract Number	AF33 657 8025

Research Study to Determine the Phase Equilibrium Relations of Selected Metal Carbides at High Temperatures.

Research Study to Determine the Phase Equilibrium Relations of Selected Metal Carbides at High Temperatures.
AD608301

Publication Date	1964
Personal Author	Sara, R. V.; Lowell, C. E.
Page Count	2
Abstract	The work summarized in the report is the result of investigations of phase equilibria in the binary systems, tantalum-carbon, hafnium-carbon, and boron-carbon. A completed phase diagram which encompasses experimental results and considerations heretofore unreported in the literature, is presented for the hafnium-carbon system. A phase diagram for the tantalum-carbon system is included. Preliminary studies on the hafnium carbidetantalum carbide quasi-binary were limited to temperatures of 3700 C at which no liquid formation was evident. Results for the boron-carbon system depicting maximum boron solubility in the graphite lattice at and near the eutectic temperature of approximately 2390 C, are also included. (Author)
Keywords	CARBIDES TANTALUM COMPOUNDS HAFNIUM COMPOUNDS BORON COMPOUNDS PHASE STUDIES REFRACTORY MATERIALS METALLOGRAPHY X-RAY DIFFRACTION ANALYSIS CRYTAL LATTICES THERMODYNAMICS SOLID SOLUTIONS MICROSTRUCTURE BORON CARBIDES HAFNIUM CARBIDES TANTALUM CARBIDES
Corporate Authors	Union Carbide Corp Parma Ohio
Supplemental Notes	Legibility of this document is in part unsatisfactory. Reproduction has been made from best available copy.
Document Type	Technical Report
NTIS Issue Number	196501
Contract Number	AF33 657 8025