MANUFACTURE OF OXIDE SYSTEM SUPERCONDUCTIVE WIRE

摘要

PURPOSE:To improve superconductivity and mechanical strength by heat-treating a pressed powder compact after the pressed powder compact composed of an oxide superconductor powder and its precursor body powder is filled into a metallic sheath and diameter-reduction process is made, and the specified consolidation of a core wire is made. CONSTITUTION:A pressed powder compact 1 is manufactured by applying a pressed powder forming process to an oxide superconductor powder and the precursor body powder of an oxide superconductor. Then a complex 3 in which the thickness dimension of a tubular body 2 has 10-25% of its outer diameter dimension is manufactured with the compact 1 filled into the body 2 made of metal. After that a reduce-diameter process is applied to the complex 3 with a rotary swaging device A, and the consolidation of a core wire is made to be 75% or more of a theoretical density. Then a heat treatment is applied. Thus superconductivity and mechanical strength can be improved.