Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Patent
1991-04-03
1993-11-09
Bell, Mark L.
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
505 1, 505736, 505742, 505785, 264 82, 148316, 148431, 148DIG35, C23C 806
Patent
active
052598853
ABSTRACT:
A method of preparing a laminated ceramic. The method includes preparing a precursor having at least one noble metal element component and at least two non-noble metal elements. The precursor is exposed to a first environment to form an oxidized zone having a first concentration of a primary ceramic phase containing the non-noble metal elements. The precursor is next exposed to a second environment to form a second oxidized zone having a second concentration of the primary ceramic phase, the second concentration being less than the first concentration. The precursor is repeatedly exposed to each environment to form a plurality of zones with the first concentration of the primary ceramic phase separated by zones with the second concentration of the ceramic.
REFERENCES:
patent: 3061482 (1962-10-01), Grant
patent: 4649083 (1987-03-01), Fister et al.
patent: 4968663 (1990-11-01), Whang
patent: 5100870 (1992-03-01), Chen et al.
American Superconductor Corporation
Bell Mark L.
Bonner C. M.
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