Anisotropy and Microstructure of High-Coercivity Rare Earth Iron Permanent Magnets

Abstract

In Nd2 Fe14 B-based permanent magnets the coercivity is in practice only 20 - 40 % of the theoretical limits. The aim of this study is to investigate Nd-Fe-B based compounds with respect to their magnetic anisotropy behaviour and to characterize the microstructure of sintered Nd-Fe-B based permanent magnets. The anisotropy field HA was determined by using the Singular Point Detection (SPD) technique, and the microstructural investigations were carried out on a JEOL 200 CS analytical transmission electron microscope equipped with a high take-off energy dispersive (EDS) X-ray analyzer. Keywords: Magnetic anisotropy, Anisotropy field; pulsed field technique; Microstructure; electron microscopy; intrinsic coercive force; Nd-Fe-B permanent magnets.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1989
Accession Number
ADA211905

Entities

People

  • Hans Kirchmayr
  • Josef Fidler
  • Peter Skalicky
  • Roland Grossinger

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Coercivity
  • Crystal Lattices
  • Crystal Structure
  • Crystals
  • Curie Temperature
  • Dihedral Angle
  • Domain Walls
  • Electron Microscopes
  • Electron Microscopy
  • Grain Boundaries
  • Heat Treatment
  • Liquid Phases
  • Magnetic Anisotropy
  • Magnetic Fields
  • Magnetic Materials
  • Magnetic Properties
  • Materials

Fields of Study

  • Physics

Readers

  • Powder metallurgy of Titanium alloys.
  • Superconducting Magnet Technology
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics