Nanocrystalline and Nanostructured High-Performance Permanent Magnets

Abstract

The rather complex correlation between the microstructure and the magnetic properties is demonstrated for two types of high-quality RE-TM permanent magnets (pms), namely nanocrystalline RE2Fe14B (RE = Nd,Pr) and nanostructured Sm2(Co,Cu,Fe,Zr)17 pms. The detailed analysis of this correlation for both pm materials leads to a quantitative comprehension of the hardening mechanism enabling the optimization of their magnetic properties and temperature dependences. In the case of RE2Fe14B, isotropic bonded pms are fabricated showing maximum energy products in the order of 90 kJ/cu m. In the case of Sm2(Co,Cu,Fe,Zr)17, magnets with excellent high temperature magnetic properties are tailored. Hereby, the investigations in addition provide important clues to the evolution of the characteristic microstructural and magnetic properties and to the role of the involved elements.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2001
Accession Number
ADP012288

Entities

People

  • D. Goll
  • George C. Hadjipanayis
  • H. Kronmueller
  • W. Sigle

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Coercivity
  • Composite Materials
  • Crystal Lattices
  • Crystal Structure
  • Crystals
  • Curie Temperature
  • Domain Walls
  • Energy
  • Fabrication
  • Fiber Spinning
  • Heat Energy
  • Magnetic Domains
  • Magnetic Materials
  • Magnetic Properties
  • Materials
  • Materials Processing
  • Transitions

Fields of Study

  • Physics

Readers

  • Nanoscale Plasmonic Nanotechnology
  • Structural Health Monitoring of Composite Structures.
  • Superconducting Magnet Technology

Technology Areas

  • Microelectronics