Production of (Mo,W) C hexagonal carbide

Patent · Tue Jun 12 04:00:00 EDT 1984

OSTI ID:6421203

Wada, T; Ohriner, E K

Solid solutions of molybdenum and tungsten having molybdenum to tungsten atom ratios between about 1:1 and about 10:1 are produced by heating a mechanically milled mixture of a molybdenum oxide and tungsten oxide to a temperature between about 1000/sup 0/C and about 1300/sup 0/C at a rate of at least about 20/sup 0/C per minute in a hydrogen-containing atmosphere and holding at temperature to reduce the oxides of molybdenum and tungsten and to provide a homogeneous solid solution of molybdenum and tungsten. The homogeneous solid solution is mixed with a stoichiometric excess of carbon and heated to a temperature between about 1200/sup 0/C and about 1800/sup 0/C under a protective atmosphere to react the carbon with the alloy powder to form a solid solution of hexagonal monocarbides.

• Assignee: Amax Inc.
• Patent Number(s): US 4454105
• OSTI ID: 6421203
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALLOYS
ATMOSPHERES
CARBIDES
CARBON
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROLLED ATMOSPHERES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DISPERSIONS
ELEMENTS
HEATING
HEXAGONAL LATTICES
HYDROGEN
MIXTURES
MOLYBDENUM CARBIDES
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
POWDERS
PRODUCTION
REDUCTION
REFRACTORY METAL COMPOUNDS
SOLID SOLUTIONS
SOLUTIONS
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN CARBIDES
TUNGSTEN COMPOUNDS
TUNGSTEN OXIDES
VERY HIGH TEMPERATURE