钕硬磁体晶界相形成的相场模拟

IF 0.5 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Journal of The Japan Institute of Metals Pub Date : 2017-01-01 DOI:10.2320/JINSTMET.JA201603

T. Koyama, Yuhki Tsukada, T. Abe, Yoshinao Kobayashi

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引用次数: 1

摘要

最近由Steinbach等人提出的非平衡相场法。将改进后的方法应用于Fe - Nd - B硬磁体n2fe14b多晶微观结构中晶界相(GBP)的形成过程。本文重点研究了GBP形态变化的时间演化规律，结果表明:(1)GBP在老化早期部分覆盖Nd - Fe晶粒，但随着老化，GBP在GBP中奥斯特瓦尔德成熟，覆盖度逐渐降低。(2) GBP的覆盖面积随着合金中Nd平均成分的增加而增大。(3) GBP与nd2fe14b相的界面能密度对GBP的形态变化影响较大。[doi:10]2320 / jinstmet。[j][201603]已出版

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Phase-Field Simulation on the Formation of Grain Boundary Phase in Neodymium Hard Magnet

The non - equilibrium phase - ﬁeld method which has recently been proposed by Steinbach et al . was slightly modiﬁed, and the improved method was applied to the formation process of grain boundary phase （ GBP ） in the Nd 2 Fe 14 B polycrystalline microstruc ture of Fe - Nd - B hard magnet. In particular, we focused on the temporal evolution of morphological changes of GBP in this study, and the results obtained are as follows: （ 1 ） The Nd Fe grains are partially covered with GBP at early stage of aging, however the coverage decreases with aging by Ostwald ripening among GBPs. （ 2 ） The coverage area by GBP increases with increasing average composition of Nd in alloy. （ 3 ） The interfacial energy density between GBP and Nd 2 Fe 14 B phase greatly affects the morphological change of GBP. ［ doi:10 . 2320 / jinstmet.JA201603 ］ Published ）

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