HD Processes in the Production of SmCo5 Permanent Magnets

被引：0
|
作者：
刘涛
李卫
刘兴民
李建奎
郭朝晖
机构：
[1] Beijing 100081
[2] Division of Functional Materials Central Iron &Steel Research Institute
[3] China
来源：
Journal of Rare Earths | 2007年 / S1期
基金：
中国国家自然科学基金;
关键词：
hydrogen decrepitation; SmCo5; alloys; sintered magnets; rare earths;
D O I：
暂无
中图分类号：
TM273 [永磁材料、永久磁铁];
学科分类号：
摘要：
The application of ‘extreme’ hydrogen-decrepitation (HD) process using high-pressure disproportionation was extended to Sm-Co5-type-alloy. The alloy with nominal composition of Sm36Co64 was treated under 1.0～2.0 MPa H2 pressure for several hours at room temperature for decrepitation. After disproportionation were high hydrogen pressures, the bulk alloys were disproportionated into particles with a size of 200. Investigations by powder X-ray diffractometer (XRD) showed, the after HD sample crystallized in the hexagonal CaCu5-type structure. The temperature dependence of pressure analysis (TPA) curve of the SmCo5 alloy showed that the hydrogen absorption temperature was about 150 ℃. Cylindrical sintered magnets of composition Sm36Co64 were prepared using HD ball milled, isostatic pressing, vacuum sintering and subsequent heat treatment. The demagnetization curves showed that the HD processes could improve the magnetic properties and squareness factor of the SmCo5 sintered magnet.
引用
收藏
页码：191 / 193
页数：3
相关论文
共 50 条
  • [21] Chemical composition and coercivity of SmCo5 magnets
    de Campos, MF
    Landgraf, FJG
    Saito, NH
    Romero, SA
    Neiva, AC
    Missell, FP
    de Morais, E
    Gama, S
    Obrucheva, EV
    Jalnin, BV
    JOURNAL OF APPLIED PHYSICS, 1998, 84 (01) : 368 - 373
  • [22] SLIGHTLY PRESSED SMCO5 SINTERED MAGNETS
    JAHN, L
    HELD, G
    NEUE HUTTE, 1979, 24 (05): : 188 - 191
  • [23] Chemical composition and coercivity of SmCo5 magnets
    J Appl Phys, 1 (368):
  • [24] STRUCTURE OF SINTERED MAGNETS OF THE COMPOUND SMCO5
    KONONENKO, AS
    SERGEYEV, VV
    MALAKHOV, GV
    ALTMAN, VA
    NIKOLAYEVA, GI
    PASHKOV, PP
    RUSSIAN METALLURGY, 1978, (05): : 145 - 148
  • [25] The Samarium Depleted Zone in SmCo5 Magnets
    de Campos, Marcos Flavio
    Landgraf, Fernando J. G.
    ADVANCED POWDER TECHNOLOGY VIII, PTS 1 AND 2, 2012, 727-728 : 169 - +
  • [26] STUDY ON TEMPERING EFFECT OF SmCo5 PERMANENT MAGNETS AT 710℃ BY POSITRON ANNIHILATION TECHNIQUE
    何永枢
    季国坤
    石岩
    金汉民
    Science Bulletin, 1988, (07) : 565 - 567
  • [27] THE CRYSTAL-STRUCTURE AND COERCIVE FORCE OF SMCO5 SINTERED PERMANENT-MAGNETS
    LILEEV, AS
    MENUSHENKOV, VP
    PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1983, 75 (01): : 341 - 346
  • [28] Thermal remagnetization of SmCo5 permanent magnets -: Influence of starting temperature and field fluctuations
    Jahn, L
    Ivanov, V
    Schumann, R
    Loewenhaupt, M
    EUROPEAN MAGNETIC MATERIALS AND APPLICATIONS, 2001, 373-3 : 417 - 420
  • [29] REVERSIBILITY OF MAGNETIC-PROPERTIES OF SINTERED PERMANENT-MAGNETS MADE OF SMCO5
    LIVSHITS, BG
    LILEYEV, AS
    MENUSHENKOV, VP
    RUSSIAN METALLURGY, 1976, (04): : 137 - 140
  • [30] STRUCTURE PECULIARITIES AND PROPERTIES OF SINTERED PERMANENT-MAGNETS BASED ON SMCO5 COMPOUND
    PASHKOV, PP
    ALTMAN, VA
    GRANOVSKIY, YB
    MALAKHOV, GV
    FIZIKA METALLOV I METALLOVEDENIE, 1982, 54 (01): : 54 - 60
12345