MICROSTRUCTURE STUDY OF HIGH COERCIVITY GA CONTAINING ND-FE-B PERMANENT-MAGNETS

被引：5
|
作者：
AHMAD, I
ALKHAFAJI, MA
DAVIES, HA
RAINFORTH, WM
BUCKLEY, RA
机构：
[1] Department of Engineering Materials, University of Sheffield, Sheffield
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1995年 / 145卷 / 1-2期
关键词：
D O I：
10.1016/0304-8853(94)01670-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Recently we reported that substitution of 1 at% of Fe by Ga in a Nd18Fe76B6 alloy led, in some cases, to an increase in coercivity by a factor of 2 (to > 46 kOe) for chill block melt spun ribbons. In this paper a microstructural investigation by high resolution transmission electron microscopy of the Ga-containing ribbons is reported. It was observed that the Ga entered only the Nd2Fe14B hard magnetic phase with no evidence of its presence in the Nd-rich grain boundary phase. Ultra fine particles of similar to 5 nm mean diameter were observed within the Nd2Fe14B crystallites and these have been identified as rhombohedral gallium by analysis of lattice images. The possible reasons for the increased coercivity are briefly discussed.
引用
收藏
页码：L19 / L22
页数：4
相关论文
共 50 条
  • [1] Microstructure study of high coercivity Ga containing Nd-Fe-B permanent magnets
    [J]. Ahmad, I., 1600, (145): : 1 - 2
  • [2] FACTORS CONTROLLING THE COERCIVITY OF ND-FE-B TYPE PERMANENT-MAGNETS
    TANG, WH
    ZHOU, SZ
    WANG, R
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1988, 75 (03) : 416 - 420
  • [3] THE ND-FE-B MATERIALS FOR PERMANENT-MAGNETS
    HIROSAWA, S
    TSUBOKAWA, Y
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1990, 84 (03) : 309 - 316
  • [4] ON THE TEXTURE OF ND-FE-B PERMANENT-MAGNETS
    ZHENG, CH
    FU, T
    ZENG, XY
    [J]. JOURNAL OF THE LESS-COMMON METALS, 1990, 159 (1-2): : 69 - 74
  • [5] SINTERED ND-FE-B PERMANENT-MAGNETS
    HIGUCHI, A
    HIROSAWA, S
    [J]. IEEE TRANSACTIONS ON MAGNETICS, 1989, 25 (05) : 3555 - 3560
  • [6] Development of high coercivity Nd-Fe-B permanent magnets
    Komuro, M.
    Satsu, Y.
    Suzuki, H.
    Ueda, K.
    Nambu, A.
    Sugawara, A.
    Matsuoka, H.
    [J]. TMS2011 SUPPLEMENTAL PROCEEDINGS, VOL 1: MATERIALS PROCESSING AND ENERGY MATERIALS, 2011, : 365 - 373
  • [7] EVOLUTION OF THE MICROSTRUCTURE OF RAPIDLY SOLIDIFIED ND-FE-B PERMANENT-MAGNETS
    CHU, TY
    RABENBERG, L
    MISHRA, RK
    [J]. JOURNAL OF APPLIED PHYSICS, 1991, 69 (08) : 6046 - 6048
  • [8] GRAIN-SIZE DEPENDENCE OF COERCIVITY OF SINTERED ND-FE-B PERMANENT-MAGNETS
    TANG, WH
    ZHOU, SZ
    HU, B
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1991, 94 (1-2) : 67 - 73
  • [9] PRODUCTION AND PROPERTIES OF ND-FE-B PERMANENT-MAGNETS
    TALVITIE, M
    [J]. ACTA POLYTECHNICA SCANDINAVICA-APPLIED PHYSICS SERIES, 1993, (187): : 1 - 58
  • [10] MECHANICALLY ALLOYED ND-FE-B PERMANENT-MAGNETS
    SCHULTZ, L
    SCHNITZKE, K
    WECKER, J
    [J]. NEW MATERIALS BY MECHANICAL ALLOYING TECHNIQUES, 1989, : 299 - 304
12345