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.
ISURF Reference Number
Iowa State University Research Foundation, Inc.,
McCallum, R. William; Ellis, Timothy W.; Dennis, Kevin W.; Hofer, Robert J.; and Branagan, Daniel J., "Production method for making rare earth compounds" (1997). Iowa State University Patents. 123.