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

Abstract

Intermetallic phases R2(Co,Fe)17 with R = Ce, Pr, Nd, Sm, Y, and MM(Ce-rich mischmetal) have been prepared and their metallurgical and magnetic properties studied. The melting behavior, phase transformations and Curie temperatures, lattice constants and directions of easy magnetization of the R2(Co,Fe)17 phases were determined and the results are presented. All systems except R = Nd have compositional ranges in which the easy direction of magnetization is the c-axis. The praseodymium-cobalt phase diagram has been revised and extended. Three previously unreported intermetallic phases were observed, and the structure of one, Pr2Co1.7, is reported.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1971
Accession Number
AD0734244

Entities

People

  • Alden E. Ray
  • Karl J. Strnat

Organizations

  • University of Dayton

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Crystal Structure
  • Curie Temperature
  • Detectors
  • Differential Thermal Analysis
  • Governments
  • Intermetallic Compounds
  • Magnetic Fields
  • Magnetic Materials
  • Magnetic Phenomena
  • Magnetic Properties
  • Magnetization
  • Materials
  • Materials Laboratories
  • Measurement
  • Phase Diagrams
  • Rare Earth Alloys
  • Rare Earth Elements

Fields of Study

  • Physics

Readers

  • Powder metallurgy of Titanium alloys.
  • Superconducting Magnet Technology
  • Systems Analysis and Design