Magnetic hardening of Pr-Fe-Co-B alloys by rapid quenching

Wecker, J.; Schultz, L.
January 1989
Applied Physics Letters;1/23/1989, Vol. 54 Issue 4, p393
Academic Journal
We have investigated the magnetic properties of liquid-quenched Pr15 (Fe1-x Cox )77 B8 over the whole range of Co concentrations. The coercivity Hci and the remanence Jr depend on the Co content in the same way as in Nd15 (Fe1-x Cox )77 B8 . For the ternary Pr-Co-B a high Hci , as large as 15.2 kA/cm, has been obtained. In Co-rich alloys the temperature dependence of Hci and Jr is limited by the spin reorientation at temperatures well below the Curie point. Except for Pr15 Co77 B8 , annealing of overquenched ribbons leads to substantially lower coercivities. The possible microstructural origin of the magnetic hardening is discussed.


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