Refining of niobium by levitation melting technique

Journal Article · Mon Apr 01 00:00:00 EST 1985 · J. Met.; (United States)

DOI:https://doi.org/10.1007/BF03259440· OSTI ID:5229973

Asfahani, R I; Abbaschian, G J; Murty, Y V; Patchett, J A; Shahapurkar, D S

The refining behavior of niobium, produced by an aluminothermic reduction reaction of Nb/sub 2/O/sub 5/, is studied using an electromagnetic levitation and melting technique. Under experimental conditions, significant refinement of niobium thermite occurs during levitation melting. Residence time plays a significant role in the refining process, and the refining kinetics, during levitation melting, correlate well with the approximate equations for desorption of nitrogen and carbon. The purity of the levitation-melted product is compared to that of niobium processed by the conventional EB drip-melting process.

• Research Organization: Cabot Corp., Reading, PA
• OSTI ID: 5229973
• Journal Information: J. Met.; (United States), Vol. 37:4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NIOBIUM
ZONE MELTING
ZONE REFINING
CARBON
CHEMICAL REACTION KINETICS
DESORPTION
ELECTROMAGNETISM
EQUATIONS
IMPURITIES
LEVITATION
NIOBIUM OXIDES
NITROGEN
REDUCTION
TIME DEPENDENCE
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
KINETICS
MAGNETISM
MELTING
METALS
NIOBIUM COMPOUNDS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PROCESSING
REACTION KINETICS
REFINING
REFRACTORY METAL COMPOUNDS
SEPARATION PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360101* - Metals & Alloys- Preparation & Fabrication