Accession Number : ADA190701

Title :   Composite Ceramic Superconducting Filaments for Superconducting Cable.

Descriptive Note : Interim progress rept 16 Oct-15 Dec 87,

Corporate Author : CERAMICS PROCESS SYSTEMS CORP CAMBRIDGE MA

Personal Author(s) : Halloran, John W

PDF Url : ADA190701

Report Date : 05 Jan 1987

Pagination or Media Count : 94

Abstract : This is the second progress report of a five month program to demonstrate the feasibility of manufacturing superconducting wires form YBa2Cu307-x, consisting of a small ceramic core with a copper cladding. The ceramic core is to be produced from a dry spun ceramic fiber, sintered to create a 010 fiber texture to enhance critical current. The sintered fiber is to be clad with copper by electroplating. The sintering and microstructure development of YBa2Cu307-x has been characterized for as calcined and milled powder, both as undoped and doped with 5wt% CuO. The undoped powder reaches 94% density, with fully recrystallized grains after 15 hours at 955 C. The CuO doped material sinters to full density at temperatures as low as 925 C, with extensive recrystallization. The resistivity has been measured as a function of temperature for nearly dense and relatively porous undoped material. Keywords: Superconductor, Ceramic, Copper oxides, Yttrium, Barium.

Descriptors :   *SUPERCONDUCTORS, *ELECTRIC CABLES, *METAL SPINNING, *FABRICATION, *FIBER METALLURGY, BARIUM, CERAMIC FIBERS, CERAMIC MATERIALS, CLADDING, COPPER, CORES, DENSITY, ELECTROPLATING, FIBERS, FILAMENTS, MANUFACTURING, POROUS MATERIALS, POWDERS, RECRYSTALLIZATION, RESISTANCE, SINTERING, WIRE, BARIUM COMPOUNDS, YTTRIUM COMPOUNDS, COPPER COMPOUNDS, VISCOELASTICITY

Subject Categories : Electrical and Electronic Equipment
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE