Enhancement of coercivity of hot-deformed Nd-Fe-B anisotropic magnet by low-temperature grain boundary diffusion of Nd60Dy20Cu20 eutectic alloy

被引：116
作者：
Sepehri-Amin, H. [1 ,2 ]
Liu, J. [1 ,3 ]
Ohkubo, T. [1 ,2 ]
Hioki, K. [4 ]
Hattori, A. [4 ]
Hono, K. [1 ,2 ,3 ]
机构：
[1] Natl Inst Mat Sci, Elements Strategy Initiat Ctr Magnet Mat, Tsukuba, Ibaraki 3050047, Japan
[2] Japan Sci & Technol Agcy, CREST, Tokyo, Japan
[3] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan
[4] Daido Steel Co Ltd, Daido Corp Res & Dev Ctr, Nagoya, Aichi 4578545, Japan
来源：
SCRIPTA MATERIALIA | 2013年 / 69卷 / 09期
关键词：
Permanet magnet; Nd-Fe-B; Coercivity; Diffusion process; UPSET NDFEB MAGNETS; SINTERED MAGNETS; MICROSTRUCTURE;
D O I：
10.1016/j.scriptamat.2013.07.011
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The coercivity of a hot-deformed Nd-Fe-B magnet was enhanced from 1.6 to 2.6 T by a low-temperature grain boundary diffusion process using a Nd60Dy20Cu20 near-eutectic alloy. The alloy melt infiltrates into the magnet through grain boundaries at the processing temperature of 650 degrees C. The composition of ferromagnetic elements in the intergranular phase parallel to the c-planes decreases substantially and thin Dy-rich shell surrounds the Nd2Fe14B phase grains after the diffusion process, which explains the large enhancement in coercivity. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：647 / 650
页数：4
相关论文
共 23 条
  • [1] ENHANCED COERCIVITIES IN DIE-UPSET ND-FE-B MAGNETS WITH DIFFUSION-ALLOYED ADDITIVES (ZN, CU, AND NI)
    FUERST, CD
    BREWER, EG
    [J]. APPLIED PHYSICS LETTERS, 1990, 56 (22) : 2252 - 2254
  • [2] Haizuka H., 2011, DENKI SEIKO, V82, P85
  • [3] MAGNETIZATION AND MAGNETIC-ANISOTROPY OF R2FE14B MEASURED ON SINGLE-CRYSTALS
    HIROSAWA, S
    MATSUURA, Y
    YAMAMOTO, H
    FUJIMURA, S
    SAGAWA, M
    YAMAUCHI, H
    [J]. JOURNAL OF APPLIED PHYSICS, 1986, 59 (03) : 873 - 879
  • [4] Coercivity enhancement by the grain boundary diffusion process to Nd-Fe-B sintered magnets
    Hirota, K.
    Nakamura, H.
    Minowa, T.
    Honshima, M.
    [J]. IEEE TRANSACTIONS ON MAGNETICS, 2006, 42 (10) : 2909 - 2911
  • [5] Strategy for high-coercivity Nd-Fe-B magnets
    Hono, K.
    Sepehri-Amin, H.
    [J]. SCRIPTA MATERIALIA, 2012, 67 (06) : 530 - 535
  • [6] Broadening the applications of the atom probe technique by ultraviolet femtosecond laser
    Hono, K.
    Ohkubo, T.
    Chen, Y. M.
    Kodzuka, M.
    Oh-ishi, K.
    Sepehri-Amin, H.
    Li, F.
    Kinno, T.
    Tomiya, S.
    Kanitani, Y.
    [J]. ULTRAMICROSCOPY, 2011, 111 (06) : 576 - 583
  • [7] Interaction domains in die-upset NdFeB magnets in dependence on the degree of deformation
    Khlopkov, K.
    Gutfleisch, O.
    Schaefer, R.
    Hinz, D.
    Mueller, K. -H.
    Schultz, L.
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2004, 272 : E1937 - E1939
  • [8] Evolution of interaction domains in textured fine-grained Nd2Fe14B magnets
    Khlopkov, K.
    Gutfleisch, O.
    Hinz, D.
    Mueller, K.-H.
    Schultz, L.
    [J]. JOURNAL OF APPLIED PHYSICS, 2007, 102 (02)
  • [9] HRTEM studies of grain boundaries in die-upset Nd-Fe-Co-Ga-B magnets
    Kirchner, A
    Thomas, J
    Gutfleisch, O
    Hinz, D
    Müller, KH
    Schultz, L
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2004, 365 (1-2) : 286 - 290
  • [10] HOT-PRESSED NEODYMIUM-IRON-BORON MAGNETS
    LEE, RW
    [J]. APPLIED PHYSICS LETTERS, 1985, 46 (08) : 790 - 791
123