High-Tc Superconductor Prepared by Oxidation of a Mechanically Alloyed Nonequilibrium fcc Ba2YCu3 Phase
- 1 May 1988
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 27 (5A) , L779
- https://doi.org/10.1143/jjap.27.l779
Abstract
A nonequilibrium fcc Ba2YCu3 phase was prepared in an immiscible Ba-Y-Cu system by mechanical alloying (MA). Heating of the nonequilibrium phase powder in air resulted in the structural change to an equilibrium metallic phase at about 440 K, followed by the oxidation into Ba2YCu3O y at temperatures above 470 K. The Ba-Y-Cu oxide prepared by oxidation of the pressed product of the fcc alloy powder exhibited high-T c superconductivity with zero resistance at 89 K. Thus, MA is useful for the preparation of a high-T c oxide superconductor through the formation of the homogeneously mixed fcc phase of immiscible elements.Keywords
This publication has 12 references indexed in Scilit:
- An X-Ray Diffraction and Electron Microscopic Study of a New High-Tc Superconductor based on the Bi-Ca-Sr-Cu-O SystemJapanese Journal of Applied Physics, 1988
- Identification of the Superconducting Phase in the Bi-Ca-Sr-Cu-O SystemJapanese Journal of Applied Physics, 1988
- High-Tc Superconductors Prepared by Oxidation of Vapor-Quenched Amorphous Alloy Films in Ba-Y-Cu and Ba-Yb-Cu SystemsJapanese Journal of Applied Physics, 1988
- High-Tc Superconductor Prepared by Oxidization of a Melt-Spun Eu1Ba2Cu3 Alloy RibbonJapanese Journal of Applied Physics, 1987
- Glassy Yb0.17Ba0.33Cu0.50 alloy as precursor for the high-Tc oxide superconductor Y1Ba2Cu3OxMaterials Letters, 1987
- Preparation of new amorphous Cu-Nb-Sn alloys by mechanical alloying of elemental copper, niobium and tin powdersJournal of Materials Science Letters, 1987
- High Tc Superconductor Prepared by Oxidization of a Liquid-Quenched Yb1Ba2Cu3 Alloy Foil in AirJapanese Journal of Applied Physics, 1987
- X-Ray and Electron Microscopic Study of a High Temperature Superconductor Y0.4Ba0.6CuO2.22Japanese Journal of Applied Physics, 1987
- High Tc Magnetic Superconductor: Ho-Ba-Cu OxideJapanese Journal of Applied Physics, 1987
- Preparation of a High Tc Superconductor by Oxidization of an Amorphous La1.8Sr0.2Cu Alloy Ribbon in AirJapanese Journal of Applied Physics, 1987