Residual stress measurement in YBCO thin films.

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Residual stress in YBCO films on Ag and Hastelloy C substrates was determined by using 3-D optical interferometry and laser scanning to measure the change in curvature radius before and after film deposition. The residual stress was obtained by appropriate analysis of curvature measurements. Consistent with residual thermal stress calculations based on the thermal expansion coefficient mismatch between the substrates and YBCO film, the measured residual stress in the YBCO film on Hastelloy C substrate was tensile, while it was compressive on the Ag substrate. The stress values measured by the two techniques were generally in good agreement, suggesting that ... continued below

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14 pages

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Cheon, J. H. & Singh, J. P. May 13, 2002.

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Residual stress in YBCO films on Ag and Hastelloy C substrates was determined by using 3-D optical interferometry and laser scanning to measure the change in curvature radius before and after film deposition. The residual stress was obtained by appropriate analysis of curvature measurements. Consistent with residual thermal stress calculations based on the thermal expansion coefficient mismatch between the substrates and YBCO film, the measured residual stress in the YBCO film on Hastelloy C substrate was tensile, while it was compressive on the Ag substrate. The stress values measured by the two techniques were generally in good agreement, suggesting that optical interferometry and laser scanning have promise for measuring residual stresses in thin films.

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14 pages

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  • 104th Annual Meeting and Exposition of the American Ceramic Society, St. Louis, MO (US), 04/28/2002--05/01/2002

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  • Report No.: ANL/ET/CP-107651
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 795038
  • Archival Resource Key: ark:/67531/metadc739004

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  • May 13, 2002

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  • Oct. 19, 2015, 7:39 p.m.

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  • March 30, 2016, 7:06 p.m.

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Cheon, J. H. & Singh, J. P. Residual stress measurement in YBCO thin films., article, May 13, 2002; Illinois. (digital.library.unt.edu/ark:/67531/metadc739004/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.