Unusual effects of Ti and C additions on structural and magnetic properties of Nd-Fe-B nanocomposite magnets in a B-rich and Nd-poor composition range

被引：66
作者：
Hirosawa, S [1 ]
Kaneklyo, H [1 ]
Miyoshi, T [1 ]
机构：
[1] Sumitomo Special Met Co Ltd, Tech Dev Div, Res & Dev Div, Fundamental Res Sect, Osaka 6180013, Japan
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 281卷 / 01期
关键词：
nanocomposite magnet; Nd-Fe-B; magnetic properties; microstructure; rapid solidification;
D O I：
10.1016/j.jmmm.2004.03.046
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Effects of Ti and C additions on structural and magnetic properties of FexB/Nd2Fe14B-type nanocomposite permanent magnets (x = 3 or 23/6) prepared by means of rapid solidification and subsequent annealing in a B-rich and Nd-poor composition range are reported. Addition of Ti suppresses formation of primary Fe and promotes formation of ferromagnetic iron-borides. Carbon addition is effective for grain refinement and suppression of unfavorable formation of TiB2, resulting in improvement of magnetic properties. Compositional adjustments have yielded a series of Fe2B/Nd2Fe14B-type isotropic nanocomposite permanent magnets with magnetic performance comparable to near-single-phase isotropic melt-spun magnets in a composition range B > 10 at% and Nd < 10 at%. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：58 / 67
页数：10
相关论文
共 16 条
[1]  
BRAGNAN DJ, 1995, J ALLOY COMPD, V218, P143
[2]   A new generation of gas atomized powder with improved levels of energy product and processability [J].
Branagan, DJ ;
Hyde, TA ;
Sellers, CH ;
Lewis, LH .
IEEE TRANSACTIONS ON MAGNETICS, 1996, 32 (05) :5097-5099
[3]   ALTERING THE COOLING RATE DEPENDENCE OF PHASE-FORMATION DURING RAPID SOLIDIFICATION IN THE ND2FE14B SYSTEM [J].
BRANAGAN, DJ ;
MCCALLUM, RW .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1995, 146 (1-2) :89-102
[4]   PROPERTIES OF METASTABLE TERNARY COMPOUNDS AND AMORPHOUS-ALLOYS IN THE ND-FE-B SYSTEM [J].
BUSCHOW, KHJ ;
DEMOOIJ, DB ;
VANNOORT, HM .
JOURNAL OF THE LESS-COMMON METALS, 1986, 125 :135-146
[5]   The effects of refractory metals on the magnetic properties of α-Fe/R2Fe14B-type nanocomposites [J].
Chang, WC ;
Wang, SH ;
Chang, SJ ;
Tsai, MY ;
Ma, BM .
IEEE TRANSACTIONS ON MAGNETICS, 1999, 35 (05) :3265-3267
[6]   MELTSPUN PERMANENT-MAGNET MATERIALS CONTAINING FE3B AS THE MAIN PHASE [J].
COEHOORN, R ;
DEMOOIJ, DB ;
DEWAARD, C .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1989, 80 (01) :101-104
[7]  
COEHOORN R, 1988, J PHYS C SOLID STATE, V8, P669
[8]   Current status and future outlook for bonded neodymium permanent magnets [J].
Croat, JJ .
JOURNAL OF APPLIED PHYSICS, 1997, 81 (08) :4804-4809
[9]   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
[10]   Direct formation of Fe3B/Nd2Fe14B nanocomposite permanent magnets in rapid solidification [J].
Hirosawa, S ;
Shigemoto, Y ;
Miyoshi, T ;
Kanekiyo, H .
SCRIPTA MATERIALIA, 2003, 48 (07) :839-844
12