Coercivity enhancement in Nd-Fe-B magnetic powders by Nd-Cu-Al grain boundary diffusion

被引：19

作者：

Wang, Yongli ^{[1
]}

Luo, Yang ^{[1
]}

Wang, Zilong ^{[1
]}

Wu, Guiyong ^{[1
]}

Xie, Jiajun ^{[1
]}

Yan, Wenlong ^{[1
]}

Yu, Dunbo ^{[1
]}

机构：

[1] Grirem Adv Mat Co Ltd, Gen Res Inst Nonferrous Met, Natl Engn Res Ctr Rare Earth Mat, Beijing 100088, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2018年 / 458卷

关键词：

Melt-spun Nd-Fe-B; NdCuAl alloy; Grain boundary; Coercivity; Thermal stability; NANOCOMPOSITE MAGNETS; MICROSTRUCTURE;

D O I：

10.1016/j.jmmm.2018.02.082

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A significant enhancement in coercivity of Nd(7.92)Pr(2.20)Fe(83.91)ZrxB(5.57)Al(0.4-x) powders was achieved by Nd80Cu10Al10 grain boundary diffusion. The room temperature coercivity was drastically increased from 7.4 kOe to 23.14 kOe by the diffusion process with the content 30% of Nd80Cu10Al10 alloy. Nd-Cu-Al alloy diffusion process resulted in grain growth and formed continuous grain boundary phases. The boundary layers were very effective in pinning the motion of domain walls, leading to an increased coercivity. In addition, an increased coercivity was also obtained from 3.1 kOe to 9.8 kOe at 175 degrees C in the bonded magnets with the diffusion of 30% content NdCuAl alloy. So the thermal stability of the bonded magnets was improved. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：85 / 89

页数：5

共 32 条

[1] High-coercivity hot-deformed Nd-Fe-B permanent magnets processed by Nd-Cu eutectic diffusion under expansion constraint [J].

Akiya, T. ;

Liu, J. ;

Sepehri-Amin, H. ;

Ohkubo, T. ;

Hioki, K. ;

Hattori, A. ;

Hono, K. .

SCRIPTA MATERIALIA, 2014, 81 :48-51

[2] Coercivity enhancement of hot-deformed Nd-Fe-B magnet by grain boundary diffusion process using the reaction of NdHX and Cu nanopowders [J].

Cha, Hee-Ryoung ;

Jeon, Kwang-Won ;

Yu, Ji-Hun ;

Kwon, Hae-Woong ;

Kim, Yang-Do ;

Lee, Jung-Goo .

JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 693 :744-748

[3] PR-FE AND ND-FE-BASED MATERIALS - A NEW CLASS OF HIGH-PERFORMANCE PERMANENT-MAGNETS [J].

CROAT, JJ ;

HERBST, JF ;

LEE, RW ;

PINKERTON, FE .

JOURNAL OF APPLIED PHYSICS, 1984, 55 (06) :2078-2082

[4] Textured Nd2Fe14B flakes with enhanced coercivity [J].

Cui, B. Z. ;

Zheng, L. Y. ;

Marinescu, M. ;

Liu, J. F. ;

Hadjipanayis, G. C. .

JOURNAL OF APPLIED PHYSICS, 2012, 111 (07)

[5] Nd2Fe14B/FeCo Anisotropic Nanocomposite Films with a Large Maximum Energy Product [J].

Cui, Wei-Bin ;

Takahashi, Yukiko K. ;

Hono, Kazuhiro .

ADVANCED MATERIALS, 2012, 24 (48) :6530-6535

[6] COERCIVITY ENHANCEMENT OF MELT-SPUN ND-FE-B RIBBONS USING LOW-LEVEL CU ADDITIONS [J].

HERBST, JF ;

FUERST, CD ;

MISHRA, RK ;

MURPHY, CB ;

VANWINGERDEN, DJ .

JOURNAL OF APPLIED PHYSICS, 1991, 69 (08) :5823-5825

[7] R2FE14B MATERIALS - INTRINSIC-PROPERTIES AND TECHNOLOGICAL ASPECTS [J].

HERBST, JF .

REVIEWS OF MODERN PHYSICS, 1991, 63 (04) :819-898

[8] CRYSTAL AND MAGNETIC-STRUCTURE OF PR2FE14B AND DY2FE14B [J].

HERBST, JF ;

YELON, WB .

JOURNAL OF APPLIED PHYSICS, 1985, 57 (06) :2343-2345

[9] The role of local anisotropy profiles at grain boundaries on the coercivity of Nd2Fe14B magnets [J].

Hrkac, Gino ;

Woodcock, Thomas G. ;

Freeman, Colin L. ;

Goncharov, Alexander ;

Dean, Julian ;

Schrefl, Thomas ;

Gutfleisch, Oliver .

APPLIED PHYSICS LETTERS, 2010, 97 (23)

[10]

[黄小卫 Huang Xiaowei], 2006, [中国稀土学报, Journal of the Chinese Rare Earth Society], V24, P129

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