Research and Development of Rare Earth-Transition Metal Alloys as Permanent-Magnet Materials
Semiannual interim technical rept. 1 Jan-30 Jun 1972
DAYTON UNIV OH RESEARCH INST
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The results of thermomagnetic analyses of the R2Co1-xFex17 phases with R Ce, Pr, Sm, Y, and MM above room temperature are reported, as well as the results of room temperature saturation magnetization for the phases with R Ce, Pr, Nd, Sm, and Y. The magnitude of the magnetocrystalline anisotropy has been measured on a large number of magnetically aligned powder specimens for the ternary phases with R Ce, Pr, Sm, Y, and MM. The phase Ce2Co0.5Fe0.517 has been re-examined by metallographic, x-ray diffraction, and electron microprobe analyses to explain the unusual thermal and magnetic transitions observed by DTA and TMA for the iron-rich Ce2co1-xFex17 phases with 0.4 or x or 0.7. The neodymium-cobalt alloy system has been re- examined and a revised phase diagram is proposed. The results of some preliminary sintering experiments using NdCo5 and DiCo5 as base metals and 60 Sm40 Co and 70 Pr30 Co alloys as sintering aids are reported.
- Electrical and Electronic Equipment
- Properties of Metals and Alloys