Materials Research for Advanced Inertial Instrumentation; Task 3: Rare Earth Magnetic Material Technology as Related to Gyro Torquers and Motors.

Abstract

Preliminary measurements of flux decay rates of high coercivity and high energy product hot isostatically pressed (HIPed) SmCo5 magnets show that an increase of samarium content by one weight percent, increasing the Sm2Co7 second phase, raises the decay rate from -43 ppm/decade to -1070 ppm/decade. This finding may prove to be extremely valuable for producing high stability SmCo5 magnets. Oxygen contaminatio, determined to be the other major cause of instability, is expected to be significantly lowered with the use of the facilities being developed for fabrication of oxygen-free SmCo5 magnets with the support of a related program.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1981
Accession Number
ADA114955

Entities

People

  • Debanik Das
  • E. Wettstein
  • K. Kumar

Organizations

  • Charles Stark Draper Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Sensors

DTIC Thesaurus Topics

  • Amorphous Materials
  • Chemistry
  • Crystal Structure
  • Fabrication
  • Grain Size
  • Heat Treatment
  • Magnetic Materials
  • Magnetic Properties
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Metallurgy
  • Military Research
  • Physics Laboratories
  • Thermal Spraying

Fields of Study

  • Physics

Readers

  • Mathematics or Statistics
  • Powder metallurgy of Titanium alloys.
  • Superconducting Magnet Technology