Enhanced coercivity of spark plasma sintered Zn-bonded Sm-Fe-N magnets

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• 作者：D. Prabhu^a ; H. Sepehri-Amin^a ; C.L. Mendis^a ; T. Ohkubo^b ; K. Hono^a ; ^{kazuhiro.hono@nims.go.jp} ; S. Sugimoto^b
• 关键词：Permanent magnet ; Coercivity ; Sm&ndash ; Fe&ndash ; N ; Atom probe tomography
• 刊名：Scripta Materialia
• 出版年：2012
• 期刊代码：157_13596462
• 类别：et
• 出版时间：July, 2012
• 卷：67
• 期：2
• 页码：153-156
• 文件大小：536 K

摘要

A high-coercivity Zn-bonded Sm-Fe-N magnet is synthesized using spark plasma sintering. Optimal post-sinter annealing results in a large coercivity of 渭₀H_c = 2.75 T. Transmission electron microscopy and atom probe tomography revealed the formation of a Sm-Fe-Zn-N phase on the particle surface and the presence of Fe₃Zn₁₀ at the grain boundaries, which are believed to be the cause of the enhanced coercivity.