Hot isostatic processing of high current density high temperatur

Details Hot isostatic processing of high current density high temperatur Hot isostatic processing of high current density high temperatur

1991-05-30

1993-06-29

Gorski, Joseph M.

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

29599, 264570, 505705, H01L 3924

Patent

active

052234789

ABSTRACT:
A method to form a superconducting wire or ribbon contains the steps: (1) forming ceramic powder, (2) forming pellets from the powder, (3) inserting the pellets in a metal sheath, (4) reducing the cross-section of the sheathed pellets to form a composite, (5) sealing the composite in a deformable container, (6) hot isostatically pressing the composite at a temperature over 600.degree. C., where the temperature is close to or just above the melting point of the core, and (7) annealing the pressed composite in a source of oxygen at a temperature from 770.degree. C. to 870.degree. C. for at least 40 hours.

REFERENCES:
patent: 4826808 (1989-05-01), Yurek et al.
patent: 4863804 (1989-09-01), Whitlow et al.
patent: 5004722 (1991-04-01), Tallman
Jin et al., Applied Physics Letters, vol. 51, No. 3, Jul. 20, 1987, pp. 203-204.
Haldar et al., Science, vol. 241, Sep. 1988, pp. 1198-1200.

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