Phase Composition and Magnetic Properties of Nd2Fe14B/α-Fe Nanocomposites Prepared by Mechanical Alloying

被引：3

作者：

Savchenko A.G. ^{[1
]}

Menushenkov V.P. ^{[1
]}

Plastinin A.Y. ^{[2
]}

Shchetinin I.V. ^{[1
]}

Rafal’skii A.I. ^{[1
]}

Bordyuzhin I.G. ^{[1
]}

Ryazantsev V.A. ^{[3
]}

Verbetskii V.N. ^{[4
]}

机构：

[1] National University of Science and Technology MISiS, Moscow

[2] ZAO Assotsiatsiya Aerokosmicheskikh Inzhenerov, Korolev, Moscow oblast

[3] OOO NPO Global Magnetic, Korolev, Moscow oblast

[4] Moscow State University, Moscow

来源：

Russian Metallurgy (Metally) | 2018年 / 2018卷 / 04期

关键词：

exchange-coupled state; magnetic Nd[!sub]2[!/sub]Fe[!sub]14[!/sub]B/α-Fe nanocomposites; magnetic properties; mechanical alloying; phase composition;

D O I：

10.1134/S0036029518040134

中图分类号：

学科分类号：

摘要：

Combined studies of hard magnetic Nd2Fe14B/α-Fe nanocomposites are performed. They were prepared by mechanical alloying of melt-quenched Nd7.4Pr2.0Fe76.6Co4.2Zr3.4B6.4 and Nd5.8Fe80Co4.9Ti1.5Si2.5B5.3 alloys taken in mass proportions of 90/10 and 70/30. It is found that, after mechanical alloying, an amorphous–crystalline structure is formed; it consists of the hard magnetic Nd2Fe14B and soft magnetic (amorphous and α-Fe) phases. Subsequent annealing at ~500°C initiates the decomposition of the amorphous phase and the formation of the nanocrystalline Nd2Fe14B and α-Fe phases. This leads to an increase in the coercivity and the residual magnetization-to-saturation magnetization ratio (σr/σs ≥ 0.5). It is assumed that the magnetic hardening of powders is due to the formation of an exchange-coupled state, which results from the exchange interaction between α-Fe nanocrystals and the Nd2Fe14B phase. © 2018, Pleiades Publishing, Ltd.

引用

页码：354 / 358

页数：4

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