INDUCTION ZONE MELTING OF THE RARE REFRACTORY METALS

Journal Article · Sun Sep 01 04:00:00 EDT 1963 · Tsvetn. Metal.

OSTI ID:4112166

Kolchin, O P; Berlin, I K; Presnetsova, N V

Samples of titanium, zirconium, and vanadium were subjected to zone melting by induction heating in an atmosphere of argon (1 atm), or in a vacuum of 1 x 10/sup -3/ mm Hg std within a quartz tube. The metal column was 11 mm in diameter and 85 mm long. The rate of zone movement was 2 mm/minute. The analytical results showed that considerable purification of these high-melting refractory metals occurs as a result of impurity volatilization. The impurities do not accumulate at the ends of the sample. The titanium was melted in an argon atmosphere, because considerable volatilization of Ti was observed at a vacuum of 8x 10/sup -2/ mm Hg std. Fe, Mg, Mn, Cr, Si, Al, and V were separated from Ti by volatilization. The carbon content in Ti did not change after 11 zonal meltings. Nitrogen decreased by an order of magnitude, and sulfur was completely eliminated from Ti. Zirconium was zone-melted in argon. After 8 passes, the zirconium was spectroscopically pure with respect to Min, Si, Ni, Mo, Ti, Cu, and Mg. Vanadium was purified from Mg, Ti, Mo, Cu, Fe, Al, and Si impurities by zone melting after 4 passes. Impurity analyses are given for each pass. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-18-008456
• OSTI ID: 4112166
• Journal Information: Tsvetn. Metal., Journal Name: Tsvetn. Metal. Vol. Vol: No. 9
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ALUMINUM
ARGON
CARBON
CHEMISTRY
CHROMIUM
CONFIGURATION
COPPER
ENRICHMENT
EVAPORATION
FURNACES
GASES
IMPURITIES
INDUCTION
IRON
MAGNESIUM
MANGANESE
MELTING
METALLURGY
METALS
MOLYBDENUM
MOTION
NICKEL
NITROGEN
OPERATION
PERFORMANCE
QUANTITATIVE ANALYSIS
QUANTITY RATIO
QUARTZ
REFINING
SEPARATION PROCESSES
SILICON
SULFUR
TITANIUM
TRACE AMOUNTS
TUBES
VACUUM
VANADIUM
VARIATIONS
VELOCITY
VOLATILITY
ZIRCONIUM