Production method for making rare earth compounds
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.
- Inventors:
- Issue Date:
- Research Org.:
- Iowa State Univ., Ames, IA (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 563707
- Patent Number(s):
- 5690889
- Application Number:
- PAN: 8-605,324
- Assignee:
- Iowa State Univ. Research Foundation, Inc., Ames, IA (United States)
- DOE Contract Number:
- W-7405-ENG-82
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 25 Nov 1997
- 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
Citation Formats
McCallum, R W, Ellis, T W, Dennis, K W, Hofer, R J, and Branagan, D J. Production method for making rare earth compounds. United States: N. p., 1997.
Web.
McCallum, R W, Ellis, T W, Dennis, K W, Hofer, R J, & Branagan, D J. Production method for making rare earth compounds. United States.
McCallum, R W, Ellis, T W, Dennis, K W, Hofer, R J, and Branagan, D J. Tue .
"Production method for making rare earth compounds". United States.
@article{osti_563707,
title = {Production method for making rare earth compounds},
author = {McCallum, R W and Ellis, T W and Dennis, K W and Hofer, R J and Branagan, D J},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {11}
}
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