Document Type

Patent

Publication Date

11-15-1997

Abstract

A method of making a rare earth compound, such as a earth-transition metal permanent magnet compound, without the need for producing rare earth metal as a process step, comprises carbothermically reacting a rare earth oxide to form a rare earth carbide and heating the rare earth carbide, a compound-forming reactant (e.g. a transition metal and optional boron), and a carbide-forming element (e.g. a refractory metal) that forms a carbide that is more thermodynamically favorable than the rare earth carbide whereby the rare earth compound (e.g. Nd.sub.2 Fe.sub.14 B or LaNi.sub.5) and a carbide of the carbide-forming element are formed.

Patent Number

US 5,690,889

ISURF Reference Number

1855

Assignee

Iowa State University Research Foundation, Inc.,

Application Number

US 08/605,324

Date Filed

2-15-1996

Language

en

File Format

application/pdf

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