Research and Development of Rare Earth-Transition Metal Alloys as Permanent-Magnet Materials
Semiannual interim technical rept. 1 Jan-30 Jun 1971
DAYTON UNIV OH RESEARCH INST
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Intermetallic phases R2Co,Fe17 with R Ce, Pr, Nd, Sm, Y, and MMCe-rich mischmetal have been prepared and their metallurgical and magnetic properties studied. The melting behavior, phase transformations and Curie temperatures, lattice constants and directions of easy magnetization of the R2Co,Fe17 phases were determined and the results are presented. All systems except R Nd have compositional ranges in which the easy direction of magnetization is the c-axis. The praseodymium-cobalt phase diagram has been revised and extended. Three previously unreported intermetallic phases were observed, and the structure of one, Pr2Co1.7, is reported.
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