Preparations of rare earth-iron alloys by thermite reduction

Patent · Tue Sep 16 00:00:00 EDT 1986

OSTI ID:5352638

Schmidt, F A; Peterson, D T; Wheelock, J T

An improved method is described for preparing rare earth-iron alloys which consist of: mixing at least one rare earth fluoride to form a mixture, adding calcium metal to the mixture to form a reaction mixture, the amount of calcium being at least a stoichiometric amount necessary to completely reduce the fluorides to the metal, heating the reaction mixture in a sealed container under reducing conditions to a temperature sufficient to react the fluorides in the mixture with the calcium metal to form a metal alloy and a calcium fluoride slag, and separating the metal alloy for the slag thereby forming the rare earth-iron alloy.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4612047
• OSTI ID: 5352638
• Resource Relation: Patent File Date: Filed date 28 Oct 1985
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CALCIUM
THERMITE PROCESS
CALCIUM FLUORIDES
CHEMICAL PREPARATION
IRON ALLOYS
IRON FLUORIDES
RARE EARTH ALLOYS
HEATING
MIXING
MIXTURES
QUANTITY RATIO
SLAGS
STOICHIOMETRY
TEMPERATURE CONTROL
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
ALLOYS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHEMICAL REACTIONS
CONTROL
DISPERSIONS
ELEMENTS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IRON COMPOUNDS
METALS
REDUCTION
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
360101* - Metals & Alloys- Preparation & Fabrication
400201 - Chemical & Physicochemical Properties