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Journal of Applied Physics / Volume 111 / Issue 7 / PROCEEDINGS OF THE 56TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS / Hard Magnetic Materials

J. Appl. Phys. 111, 07A703 (2012); http://dx.doi.org/10.1063/1.3670976 (3 pages)

Investigation of easy axis orientation of Nd–Fe–B melt-spun ribbons produced by hot rolling and influence of Ti–C addition

M. Takezawa1, Y. Nakanishi1, Y. Morimoto1, J. Yamasaki1, and M. Yagi2

1Department of Applied Science for Integrated System Engineering, Faculty of Engineering, Kyushu Institute of Technology, 1-1 Sensui-cho, Tobata-ku, Kitakyushu, Fukuoka 804-8550, Japan
2Energy Electronics Laboratory, Sojo University, 4-22-1 Ikeda, Kumamoto 806-0082, Japan

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(Received 21 September 2011; accepted 14 October 2011; published online 10 February 2012)

The c-axis orientation of Nd–Fe–B melt-spun ribbons caused by hot rolling and the influence of Ti–C addition were investigated. A small roll was placed on a steel wheel near a quartz tube in such a manner that the melt-spun ribbons were hot rolled immediately after quenching. X-ray diffraction patterns measured on both surfaces of the Nd–Fe–B–Ti ribbon indicate that the c-axis is oriented normal to the ribbon plane. The domain pattern of the Nd–Fe–B–Ti–C ribbon was observed with a Kerr microscope. Most of the grains exhibit a maze domain configuration, indicating that the c-axis is oriented normal to the ribbon plane. Furthermore, it was demonstrated that hot rolling and the addition of Ti–C promote c-axis orientation and high coercivity of Nd–Fe–B melt-spun ribbons.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL
  3. RESULTS AND DISCUSSION
  4. CONCLUSION

KEYWORDS, PACS, and IPC

Keywords

boron alloys, coercive force, grain growth, hot rolling, iron alloys, Kerr magneto-optical effect, magnetic domains, melt spinning, neodymium alloys, quenching (thermal), titanium alloys, X-ray diffraction

PACS

  • 81.05.Bx

    Metals, semimetals, and alloys

  • 81.40.Gh

    Other heat and thermomechanical treatments

  • 78.20.Ls

    Magneto-optical effects

  • 75.60.Ch

    Domain walls and domain structure

  • 75.50.Vv

    High coercivity materials

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

International Patent Classification (IPC)

  • C22C38/00

    Ferrous alloys, e.g. steel alloys

  • C22F1/00

    Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working

  • B21B1/00

    Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations

  • C21D1/62

    Quenching devices

  • C22C14/00

    Alloys based on titanium

  • H01F1/00

    Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3670976

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    K. Toshiro, R. C. O'Handley, and N. J. Grant, Appl. Phys. Lett. 54, 2487 (1989)APPLAB000054000024002487000001.

    B. Nielsen, L. H. Lewis, T. Friessnegg, and V. J. Ghosh, J. Appl. Phys. 85, 5929 (1999)JAPIAU000085000008005929000001.


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