PURPOSE: To improve bonding strength of a coating film and to prevent chemical reaction of the coating film with a cupper basic material by forming a basic material made of Ni based alloy between the coating film made of a superconducting material and the cupper basic material.
CONSTITUTION: A cupper basic material 1 is set in a vacuum vessel 6 of a plasma spray coating device 4, a mixture gas is continuously supplied to a spray coating nozzle 7, and power is supplied between the nozzle 7 and an electrode 8 from a power source 9 to reduce the gas pressure in the vessel 6, forming a basic material 2 made of Ni on a basic material 1. Next, superconducting powder made of Y0.3Ba0.7Cu, O3-y is supplied to form a superconducting coating film 3 on the basic material 2. Then, a superconducting material 10 composed of the basic materials 1, 2 and the coating film 3 is taken out of the vessel 6, heated, and cooled to a room temperature in the atmosphere to produce a plate-like superconducting material.
KOSUGE SHIGECHIKA
KABASAWA MAKOTO
MATSUDA MINORU
SHINPO YUKIO
WATANABE ITARU
NIPPON KOKAN KK
| JPS63304529A | 1988-12-12 |
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