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Title: Production method for making rare earth compounds

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.
Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
563707
Report Number(s):
US 5,690,889/A/
PAN: US patent application 8-605,324
DOE Contract Number:
W-7405-ENG-82
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 25 Nov 1997
Research Org:
Iowa State University
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SYNTHESIS; NEODYMIUM ALLOYS; IRON ALLOYS; BORON ALLOYS; LANTHANUM ALLOYS; NICKEL BASE ALLOYS; MAGNETIC MATERIALS; PERMANENT MAGNETS; RARE EARTH COMPOUNDS; CARBIDES