High Temperature Superconductors with Improved Current Densities

Abstract

We have developed a novel technique for processing bulk high temperature superconductors and other ceramics under precisely controlled conditions of pressure, temperature, atmospheric composition, and strain rate. We achieve essentially uni-axial deformation of a pre-compacted disc inside a bellows-like capsule with massive end plates or 'anvils'. The capsule is located inside a Hot Isostatic Press (HIP), but has an independent gas supply. This makes it possible to maintain a specified gaseous atmosphere within the capsule and exert considerable forces on its contents via the anvils, simply by manipulating the two gas pressures. We call the process Differential Pressure HIP Forging, or DPHF, and are filing a patent application on the modifications to the, otherwise, conventional apparatus. DPHF opens a new regime for processing sensitive materials at elevated pressures and temperatures.

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Document Details

Document Type
Technical Report
Publication Date
Jun 15, 1994
Accession Number
ADA282996

Entities

People

  • H. L. Laquer

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Atmospheres
  • Compression
  • Compressors
  • Construction
  • Construction Materials
  • Current Density
  • Forging
  • Gas Compressors
  • High Pressure
  • High Temperature
  • High Temperature Superconductors
  • Materials
  • Measurement
  • Pressurization
  • Superconductors
  • Temperature Gradients
  • Valves

Fields of Study

  • Physics

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Powder metallurgy of Titanium alloys.
  • Thermal Physics or Thermal Science.