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Magnetic properties and texture of NdFeB magnets fabricated by current-applied-pressure-assisted process

2001; Elsevier BV; Volume: 224; Issue: 2 Linguagem: Inglês

10.1016/s0304-8853(01)00018-x

1873-4766

H.T. Kim, Y.B. Kim, H.S. Kim,

Rare-earth and actinide compounds

The current-applied-pressure-assisted (CAPA) process has been applied to obtain full dense isotropic and anisotropic NdFeB magnets from melt spun NdFeB alloy (MQP-A). The energy product of isotropic magnets obtained by this process was 120–135 kJ/m3(15–17 MGOe) and the remanence was 0.8–0.9 T(8–9 kG). These isotropic magnets were deformed with different thickness reduction ratio by CAPA process. The energy product obtained by this procedure was in excess of 320 kJ/m3(40 MGOe), and the best magnetic properties obtained were Br=1.36T(13.6kG), iHc=868kA/m(10.9kOe) and (BH)max=352kJ/m3(44.2MGOe). The effect of deformation by CAPA process on texture was examined using pole figures. The (1 0 5) texture was dominant up to the thickness reduction ratio of 74%, whereas the (0 0 6) texture was dominant at the thickness reduction ratio of 81%.