Ex-Situ Post-Deposition Processing for Large Area Y(1)BA(2)CU(3)O(7) Films and Coated Tapes
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Ex-situ post-deposition reaction processing is considered a promising alternative to in-situ physical vapor deposition techniques for coated Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7} conductor development. It was reported recently, that attempts at ex-situ processing of long Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7} precursor tapes resulted in an inhomogeneous growth rate over the tape length and rather poor properties for the whole sample. We performed a set of experiments in order to clarify the mechanisms for the ex-situ processing of large area films and estimate properties of long coated conductors manufactured by the ex-situ technique. It was found that rate limiting step of …
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Brookhaven National Lab., Upton, NY (United States)
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Upton, New York
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Description
Ex-situ post-deposition reaction processing is considered a promising alternative to in-situ physical vapor deposition techniques for coated Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7} conductor development. It was reported recently, that attempts at ex-situ processing of long Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7} precursor tapes resulted in an inhomogeneous growth rate over the tape length and rather poor properties for the whole sample. We performed a set of experiments in order to clarify the mechanisms for the ex-situ processing of large area films and estimate properties of long coated conductors manufactured by the ex-situ technique. It was found that rate limiting step of ex-situ growth of Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7} is removal of the reaction product, hydrofluoric acid, by both gas diffusion and convection in the reaction atmosphere. We report on a quantitative model that well describes the observed growth rates for films with various areas.
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Solovyov, V.; Wiesmann, H. J.; Wu, L. J.; Zhu, Y. & Suenaga, M.Ex-Situ Post-Deposition Processing for Large Area Y(1)BA(2)CU(3)O(7) Films and Coated Tapes,
article,
September 18, 2000;
Upton, New York.
(https://digital.library.unt.edu/ark:/67531/metadc720882/:
accessed July 16, 2024),
University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu;
crediting UNT Libraries Government Documents Department.