Research and Development of Rare Earth-Transition Metal Alloys as Permanent-Magnet Materials

Abstract

The results of thermomagnetic analyses of the R2(Co(1-x)Fe(x))17 phases with R = Ce, Pr, Sm, Y, and MM above room temperature are reported, as well as the results of room temperature saturation magnetization for the phases with R = Ce, Pr, Nd, Sm, and Y. The magnitude of the magnetocrystalline anisotropy has been measured on a large number of magnetically aligned powder specimens for the ternary phases with R = Ce, Pr, Sm, Y, and MM. The phase Ce2(Co(0.5)Fe(0.5))17 has been re-examined by metallographic, x-ray diffraction, and electron microprobe analyses to explain the unusual thermal and magnetic transitions observed by DTA and TMA for the iron-rich Ce2(co(1-x)Fe(x))17 phases with 0.4 < or = x < or = 0.7. The neodymium-cobalt alloy system has been re- examined and a revised phase diagram is proposed. The results of some preliminary sintering experiments using NdCo5 and DiCo5 as base metals and 60 Sm/40 Co and 70 Pr/30 Co alloys as sintering aids are reported.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1972
Accession Number
AD0750746

Entities

People

  • Alden E. Ray
  • Karl J. Strnat

Organizations

  • University of Dayton

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Alloys
  • Chemistry
  • Coercivity
  • Crystal Structure
  • Curie Temperature
  • Diffraction
  • Magnetic Fields
  • Magnetic Materials
  • Magnetic Properties
  • Materials
  • Materials Laboratories
  • Phase Diagrams
  • Rare Earth Alloys
  • Rare Earth Elements
  • Transition Metals
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science
  • Physics

Readers

  • Geochemistry
  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics