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Published: 1991

Total Pages: 312

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The chemical vapor deposition of superconducting ytterbium barium copper oxide thin films onto continuous lengths of ceramic fiber tows has been investigated. This project couples two areas of current interest in the materials field continuous fiber coating and the deposition of one of the unique high temperature superconducting oxides. The YBa2Cu3Ox material has zero resistance at temperatures above 77 K (the boiling point of nitrogen), and the film form has been shown to have high critical current densities. By coating ceramic fiber tows, a strong, flexible superconducting material in the form of wire can be developed and used for several applications, including coils for magnets and transmission lines. Over 900 deposition runs were completed using a horizontal CVD furnace and over 150 continuous fiber coating experiments were completed. The deposition was performed on fiber tows, flat samples, and flexible tapes; the continuous substrates were moved and held stationary in the furnace.