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Grain growth and alignment in hot deformed Nd-Fe-B magnets

1988; American Institute of Physics; Volume: 63; Issue: 8 Linguagem: Inglês

10.1063/1.340731

1520-8850

Raja K. Mishra, E. G. Brewer, W. Robert Lee,

Magnetic properties of thin films

Formation of grain oriented Nd-Fe-B magnets from melt-spun ribbons by hot deformation has been studied using electron microscopy. It is shown that deformation and alignment of Nd2Fe14B magnets result from a combination of plastic deformation, grain boundary migration, and grain boundary sliding. Due to a limited number of available slip systems in this material, samples with large grains deform less easily. Small grain size materials, as encountered in the melt-spun ribbons, are well suited for die-upsetting to produce oriented magnets.