Magnetic properties and Mössbauer studies of multiphase Nd–Fe–B alloy obtained from the dissociation of Nd₂Fe₁₄B melt spun ribbon

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• 作者：Machado da Silva ; J.M. ; Oliveira ; J.B. ; Rogalski ; M.S. ; Sá ; M.A.
• 关键词：Nd&ndash ; Fe&ndash ; B ; Magnetization ; Oxidation ; Mö ; ssbauer
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2003
• 期刊代码：31_03048853
• 类别：ph
• 出版时间：May, 2003
• 卷：261
• 期：3
• 页码：311-313
• 文件大小：113 K

摘要

Nd₂Fe₁₄B crystallized from melt spun Nd₁₃Fe₇₉B₈ dissociates during high temperature controlled oxidation. The magnetic moment of the final system was measured from 1.7 to 1100K under a magnetic field of 5 and 0.7T, using a SQUID and a magnetic microbalance. The results show the formation of mainly Fe₃B, Nd₂O₃ and a third phase paramagnetic at room temperature. The dissociation of the Nd₂Fe₁₄B hard phase was followed by ⁵⁷Fe Mössbauer spectometry in addition to thermomagnetic measurements.