Self-Diffusion of 147Nd in Nanocrystalline Nd2Fe14B

  1. Prof. Dr. Michael Zehetbauer7 and
  2. Prof. Ruslan Z. Valiev8
  1. W. Sprengel1,
  2. V. Barbe1,
  3. S. Herth1,2,
  4. T. Wejrzanowski1,3,
  5. O. Gutfleisch4,
  6. P.D. Eversheim5,
  7. R. Würschum6 and
  8. H.-E. Schaefer1

Published Online: 28 JAN 2005

DOI: 10.1002/3527602461.ch14b

Nanomaterials by Severe Plastic Deformation

Nanomaterials by Severe Plastic Deformation

How to Cite

Sprengel, W., Barbe, V., Herth, S., Wejrzanowski, T., Gutfleisch, O., Eversheim, P.D., Würschum, R. and Schaefer, H.-E. (2004) Self-Diffusion of 147Nd in Nanocrystalline Nd2Fe14B, in Nanomaterials by Severe Plastic Deformation (eds M. Zehetbauer and R. Z. Valiev), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527602461.ch14b

Editor Information

  1. 7

    Institut für Materialphysik, Universität Wien, Boltzmanngasse 5, 1090 Wien, Austria

  2. 8

    Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, 12 K. Marks Str., Ufa, 450 000, Russia

Author Information

  1. 1

    Institut für Theoretische und Angewandte Physik, Universität Stuttgart, Stuttgart, Germany

  2. 2

    Institut für Nanotechnologie, Forschungszentrum Karlsruhe GmbH, Karlsruhe, Germany

  3. 3

    Faculty of Materials Science, Warsaw University of Technology, Warsaw, Poland

  4. 4

    Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Dresden, Germany

  5. 5

    Helmholtz Institut für Strahlen- und Kernphysik, Universität Bonn, Bonn, Germany

  6. 6

    Institut für Technische Physik, Technische Universität Graz, Graz, Austria

Publication History

  1. Published Online: 28 JAN 2005
  2. Published Print: 25 FEB 2004

ISBN Information

Print ISBN: 9783527306596

Online ISBN: 9783527602469

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Keywords:

  • self-diffusion;
  • 147Nd diffusion;
  • nanocrystalline Nd2Fe14B;
  • radio tracer technique;
  • 59Fe diffusion

Summary

For nanocrystalline Nd2Fe14B the self-diffusivity of 147Nd was studied by the radio tracer technique. In the case of 59Fe diffusion the temperature dependence of the product of the interface thickness and the interface diffusion coefficient, δDGB, shows a sharp increase for temperatures above 951 K for which the existence of a liquid grain-boundary phase has been reported. Below 951 K the temperature dependence of the 59Fe diffusivity can be described by an Arrhenius type behavior. In the same temperature range the 147Nd diffusivity also follows an Arrhenius law, however, is slightly higher than that of 59Fe.