Magnetic Phase Analysis of RECo[sub 5] Permanent Magnetic Materials
- 1 January 1973
- conference paper
- Published by AIP Publishing
- Vol. 10 (1) , 578-581
- https://doi.org/10.1063/1.2946970
Abstract
Heat treatment of SmCo 5 ‐material at elevated temperature increases the coercive force. High temperature magnetization and susceptibility measurements up to 1500 K have shown that there is a correlation between the coercive force and the presence of second phases, e. g. RE 2 Co 17 and that annealing at high temperatures reduces the RE 2 Co 17 content. The existence of the RE 2 Co 17 phase is due to several reasons: e. g. RECo 5 forms peritectically, loss of RE through oxidation, chemical reactions with impurities and evaporation. RE has to be added in order to compensate for losses, otherwise a heat treatment can not improve the coercive force.Keywords
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