Accession Number : ADD002642

Title :   High Critical Current Superconductors and Preparation Thereof.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Howe,David G

Report Date : 16 Dec 1975

Pagination or Media Count : 5

Abstract : It is an object of the invention to provide a method of manufacturing superconductors with near or actual two phase alloys with a critical temperature above 14.5K. This is achieved by composite superconductors made from vanadium-gallium (V-Ga) and copper-gallium (Cu-Ga) or niobium-tin (Nb-Sn) and copper-tin (Cu-Sn) or vanadium-silicon (V-Si) and copper-silicon (Cu-Si) with an increased amount of metal solute and made by a mechanical deformation process. This includes a homogenization anneal to improve the uniformity of dispersion in the alloy, several series of anneals during the reduction in cross sectional size of the composite thereby avoiding degradation of the composite by stresses and strains imparted during the mechanical reduction, and a solid state reaction between the two alloys to form the superconducting interfacial layer in a vacuum or in an inert atmosphere.

Descriptors :   *Superconductors, *Patents, Composite materials, Vanadium alloys, Gallium alloys, Niobium alloys, Tin alloys, Copper alloys, Silicon alloys, Fabrication, Intermetallic compounds, Silicides, Vanadium compounds, Eutectics

Subject Categories : Laminates and Composite Materials
      Metallurgy and Metallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE