Phase Transformation in Crystalline and Amorphous Rapidly Quenched Nd-Fe-B Alloys under SPD

  1. Prof. Dr. Michael Zehetbauer4 and
  2. Prof. Ruslan Z. Valiev5
  1. D.V. Gunderov1,
  2. A.G. Popov2,
  3. N.N. Schegoleva2,
  4. V.V. Stolyarov1 and
  5. A.R. Yavary3

Published Online: 28 JAN 2005

DOI: 10.1002/3527602461.ch3i

Nanomaterials by Severe Plastic Deformation

Nanomaterials by Severe Plastic Deformation

How to Cite

Gunderov, D.V., Popov, A.G., Schegoleva, N.N., Stolyarov, V.V. and Yavary, A.R. (2004) Phase Transformation in Crystalline and Amorphous Rapidly Quenched Nd-Fe-B Alloys under SPD, 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.ch3i

Editor Information

  1. 4

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

  2. 5

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

Author Information

  1. 1

    Institute of physics of advanced materials, USATU, Ufa, Russia

  2. 2

    Institute of physics of metals, UrD RAS, Ekaterinburg, Russia

  3. 3

    National polytechnic institute, Grenoble, France

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:

  • phase transformation;
  • severe plastic deformation (SPD);
  • high-pressure torsion (HPT);
  • structure;
  • magnetic hysteresis properties;
  • Nd-Fe-B alloys;
  • Pr-Fe-B alloys;
  • permanent magnets;
  • record properties;
  • rapid quenching (RQ)

Summary

In recent years we studied the influence of severe plastic deformation (SPD) by means of high-pressure torsion (HPT) on the structure and magnetic hysteresis properties of R-Fe-B (R-Nd, Pr) alloys with the main intermetallic phase R2Fe14B [1–3]. These alloys have a great scientific and practical importance as the materials for permanent magnets with record properties [4,5]. The investigations showed that HPT leads to the decomposition of R2Fe14B phase into amorphous Nd-rich phase and N-Fe phase [1–3]. On the other hand in the result of rapid quenching (RQ) one can succeed in making the homogeneous amorphous structure in these alloys [4]. In this connection we consider that studying structures of RQ amorphous alloy Nd-Fe-B subjected to SPD is of great interest. This will allow to define the dependence of the structure forming during SPD on the initial structure of the deformed