Magnetic Hardening Studies and Novel Techniques for Preparation of High Performance Magnets

Abstract

Our research efforts have been focused on the magnetic hardening behavior of R-Fe-B magnets, the development of processing techniques for improved magnetic properties and the search for new phases with better magnetic properties. The origin of magnetic hardening was examined by correlating the microstructure, microchemistry and magnetic domain structure with the magnetic properties. This was done on powders, ribbons and sintered magnets where the effects of Co, Al and Dy were examined. High coercivities have been obtained in as-cast Nd(Pr)Fe-B alloys with impurity additions (Cu,Al,Ga,Ag) indicating the potential of these materials for hot extruded magnets. New anisotropic magnetic phases have been found in Nd-Fe-O alloys and in rare-earth carbides. Both of these systems have the potential for permanent magnet development.

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Document Details

Document Type
Technical Report
Publication Date
Nov 15, 1989
Accession Number
ADA217737

Entities

People

  • George C. Hadjipanayis

Organizations

  • Kansas State University

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Coercivity
  • Curie Temperature
  • Domain Walls
  • Electron Microscopes
  • Electron Microscopy
  • Electrons
  • Engineering
  • Grain Boundaries
  • Hardening
  • Heat Treatment
  • Magnetic Materials
  • Magnetic Properties
  • Magnets
  • Materials
  • Microscopes
  • Microstructure
  • Scientists

Fields of Study

  • Materials science

Readers

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