Optimizing the Heat Treatment of Rare Earth-Transition Metal Sintered Magnets |
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| Journal | Materials Science Forum (Volumes 660 - 661) |
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| Volume | Advanced Powder Technology VII |
| Edited by | Lucio Salgado and Francisco Ambrozio Filho |
| Pages | 290-295 |
| DOI | 10.4028/www.scientific.net/MSF.660-661.290 |
| Citation | Marcos Flávio de Campos et al., 2010, Materials Science Forum, 660-661, 290 |
| Online since | October, 2010 |
| Authors | Marcos Flávio de Campos, José Adilson de Castro |
| Keywords | Coercivity, Diffusion, Heat Treatment, Magnet |
| Abstract | Rare earth transition metals magnets, as for example SmCo5, NdFeB and Sm(CoCuFeZr)z magnets are, very often, submitted to a post-sintering heat treatment where the coercivity increases. In many cases, a slow cooling between the sintering and the annealing temperatures is applied. To optimize the time and cooling rate of heat treatment, it was developed a model using the finite volume method. This model takes into account the diffusivities of the different atom species and also the boundaries of phase diagrams. |
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