[ii] Patent Number: 5,132,278  Date of Patent: Jul. 21, 1992
AC Electric Machines", Extend Abstracts High Temperature Superconductors I, 1988, pp. 147-149. Ledbetter, H. M., et al., "Elastic Constants and Debye Temperature of Polycrystalline ... J. Mater. Res., 1987, vol. 2, pp. 788-789. Chien, C. L., et al., "Effect of Noble Metal Buffer Layers on Superconducting ... Thin Films", Appl. Phys. Lett., 1987, vol. 51, pp. 2155-2157. Sleigh, A. W., et al., "High Tc Bismuth and Thallium Copper Oxide Superconductors" MRS Bulletin, Jan. 1989, pp. 45-48.
Maple, M. B., "High Tc Oxide Superconductors", MRS Bulletin, Jan. 1989, pp. 20-21.
Ledbetter, H. M., "Elastic Properties of Metal-Oxide Superconductors", Journal of Metals, Jan. 1988, pp. 24-30.
Primary Examiner—R. Dean
Assistant Examiner—George Wyszomierski
Attorney, Agent, or Firm—Steven J. Hultquist
A superconducting composite material comprising a superconducting element, coated on its exterior surface with noble or inert metal, in a conductive metal matrix which includes nonsuperconducting fibers. The superconducting element may suitably comprise a filament of 123 metal oxide high temperature superconductor (MOHTSC) material, or other metal oxide superconductive material. The composite structure of the invention overcomes the inherent brittleness of metal oxidetype superconductive materials and the sensitivity to flaws to which MOHTSC materials are suceptible. The noble or inert metal and conductive matrix metal may suitably be applied by MOCVD techniques. A preferred form of the superconducting article of the present invention is a tape comprising a generally planar array of superconductive filaments, for applications such as energy storage devices, power transmission and propulsion systems that require large magnetic fields, transformers, motors, and generators. Also disclosed are a method and apparatus for applying a liquid organometallic compound in atomized form to a substrate which is heated to sufficient temperature to decompose the applied organometallic compound and yield a film of deposited metal on the substrate.
25 Claims, 8 Drawing Sheets