Development of Neodymium and Er3Ni Regenerator Materials

Abstract

Neodymium and Er3Ni powders were produced and examined as possible candidates for use as regenerator matrices in the regenerative heat exchanger of the Gifford-McMahon cycle refrigerator. In the case of Er3Ni, crushed powders were brittle and angular in shape, molten salt produced spheres were heavily oxidized, and gas atomized powder had a low yield (3%) and a large fraction of hollow particles. Neodymium powder, which was produced by the rotating electrode method, was smooth and spherical in shape and had a high yield (15%) of solid particles.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1991
Accession Number
ADA241592

Entities

People

  • Frank Biancanello
  • Geoffrey Green
  • James Chafe
  • Lisa O'conner
  • Louis F. Aprigliano

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Diffraction Analysis
  • Electrodes
  • Electron Microscopes
  • Electron Microscopy
  • Engineering
  • Gases
  • Heat Capacity
  • Heat Exchangers
  • Materials
  • Materials Engineering
  • Microscopes
  • Microscopy
  • Neodymium
  • Particles
  • Scanning Electron Microscopes
  • Standards

Readers

  • Calculus or Mathematical Analysis
  • Electrical Engineering
  • Thin Film Deposition Science.