Preparations of rare earth-iron alloys by thermite reduction

Patent · Tue Sep 16 04:00:00 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
• Country of Publication: United States
• Language: English

Related Subjects

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