Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Metal and nonmetal in final product
Patent
1988-04-12
1990-10-09
Lechert, Jr., Stephen J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Metal and nonmetal in final product
505736, 505 1, 419 22, 419 33, 419 49, 75352, H01L 3912, H01L 508, H01L 3924
Patent
active
049620843
ABSTRACT:
A process for producing an oxidic superconductor precursor alloy which comprises mechanicallly allowing metallic elemental constituents of the oxidic superconductor in stoichiometric proportions and in the presence of a process control agent non-detrimental to the superconductor to provide a uniform mechanically alloyed product which is compacted and worked to provide a product form such as wire, tape or thin strip. This product form can then be given the configuration required for use (e.g. open coil) and then oxidized to provide the superconductor.
REFERENCES:
patent: 3591362 (1971-07-01), Benjamin
patent: 4761263 (1988-08-01), Politis et al.
patent: 4826808 (1989-05-01), Yurek et al.
"Formation of Perovskite Surface etc.," Gruen et al., J. Elect. Chem. Society, vol. 134, No. 6, Jun. 1987.
Chem. Abs. 107-248033e, "Synthesis of a Superconducting etc. Metall. Trans. A", 1987, 18A(10) 1813-1817.
Chem. Abs. 107-247604d, "Direct Synthesis of a Metal/etc.," J. Elect. Chem. Soc., 1987, 134(10) 2635-6.
"Superconducting Microcomposites by etc.," Yurek et al., Journal of Metals, Jan. 1988, pp. 16-18.
Preparation of a High Tc Superconductor by Oxidization of a Amorphous La.sub.1.8 Sr.sub.0.2 Cu Alloy Ribbon in Air, Matsuzaki et al., pp. L334-L336, Apr. 1987.
deBarbadillo, II John J.
Smith Gaylord D.
INCO Alloys International, Inc.
Lechert Jr. Stephen J.
Mulligan, Jr. Francis J.
Steen Edward A.
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