Accession Number : AD0762304

Title :   Research and Development of Rare Earth-Transition Metal Alloys as Permanent-Magnet Materials.

Descriptive Note : Semiannual interim technical rept. 1 Jul-31 Dec 72,

Corporate Author : DAYTON UNIV OHIO RESEARCH INST

Personal Author(s) : Ray,Alden E. ; Strnat,Karl J.

Report Date : MAY 1973

Pagination or Media Count : 44

Abstract : The results of room temperature saturation magnetization and anistropy measurements made using an oscillating specimen magnetometer are reported for single crystals of the compositions Pr2(Co(1-x)Fe(x))17, x = 0.2, 0.3, 0.4 and Y2(Co(1-x)Fe(x))17, x = 0.1, 0.2, 0.3. Measured values support earlier measurements made on packed powders of the same compositions. Values for the anisotropy constants, K1 and K2, are also given. The cerium-cobalt alloy system has been re-examined and a revised phase diagram is proposed. The thermal stability of the RCo5 phase was investigated in CeCo5, PrCo5, and NdCo5 using metallography, scanning electron microscopy, electron probe microanalysis, differential thermal analysis and thermomagnetic analysis. (Modified author abstract)

Descriptors :   (*MAGNETIC ALLOYS, RARE EARTH ELEMENTS), (*MAGNETS, MANUFACTURING), INTERMETALLIC COMPOUNDS, PHASE STUDIES, ANISOTROPY, PRASEODYMIUM COMPOUNDS, COBALT ALLOYS, IRON ALLOYS, YTTRIUM COMPOUNDS, CERIUM ALLOYS, NEODYMIUM ALLOYS, MAGNETIC PROPERTIES, THERMAL PROPERTIES

Subject Categories : Electrical and Electronic Equipment
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE