High Temperature Superconductors with Improved Current Densities
Final rept. 1 Jul 1991-30 Jun 1993
CRYOPOWER ASSOCIATES LOS ALAMOS NM
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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.
- Ceramics, Refractories and Glass
- Electricity and Magnetism