Preparation of low-silicon vanadium metal
A modified method for preparing high purity vanadium metal by the aluminothermic reduction of V/sub 2/O/sub 5/ oxide in a water-cooled copper crucible is described. Experiments designed to prepare low-silicon vanadium directly from commercial grade V/sub 2/O/sub 5/ show promise of simplifying the process for producing this material on a commercial scale. A vanadium-oxygen alloy is first prepared and then double electron-beam melted into platelet form during which SiO is removed by volatilization. Residual oxygen is removed from the platelets by a calcium deoxidation procedure. Experiments in which V/sub 2/O/sub 5/ is added to commercial vanadium metal to lower its silicon content by similar processing are also described. Silicon in amounts up to 1000 wt ppM was found to have a rather small effect on the hardness, yield and tensile strength and ductility of vanadium.
- Research Organization:
- Ames Lab., IA (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 5497401
- Report Number(s):
- IS-M-552; CONF-8406267-1; ON: DE85015516
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
ELEMENTS
HARDNESS
MECHANICAL PROPERTIES
METALS
OXIDES
OXYGEN COMPOUNDS
PURIFICATION
REDUCTION
REMOVAL
SEMIMETALS
SILICON
SYNTHESIS
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VANADIUM
VANADIUM COMPOUNDS
VANADIUM OXIDES