Rare Earth Permanent Magnets — the Contribution of CEAM

  • J. M. D. Coey
  • D. Givord
  • I. R. Harris
  • R. Hanitsch

Abstract

The impact of the discovery in 1983 of a high-performance iron-rich rare-earth permanent magnet has been rapid and far-reaching. This new material is probably the most significant advance in permanent magnetism since the development of ferrites in the 1950s. It is progressively supplanting samarium-cobalt (1:5 and 2:17) in many applications, and may eventually replace alnicos. Exciting new products and engineering prospects are opened up by the availability of magnets with an energy product in excess of 250 kJ.m-3 and a service temperature of up to 150°C. In CEAM, research has been conducted in parallel with a view to understanding and improving the magnetic properties of Nd2Fe14B, and related phases, searching for new iron-rich phases that may prove to be equally interesting, improving the processing and corrosion resistance of Nd-Fe-B magnets and using the magnets in prototype devices. This section is designed to highlight the contribution of CEAM and guide the reader to what is of interest to them in the rest of the book.

Keywords

Permanent Magnet Anisotropy Field Crystal Field Parameter Sintered Magnet Spin Reorientation Transition 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© ECSC, EEC, EAEC, Brussels and Luxembourg 1989

Authors and Affiliations

  • J. M. D. Coey
  • D. Givord
  • I. R. Harris
  • R. Hanitsch

There are no affiliations available

Personalised recommendations