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Transient creep of YBa2Cu3O7−x superconductor |
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| Authors: | M Jim nez-Melendo A Domí nguez-Rodrí guez and J L Routbort |
| Institution: | a Departamento de Física de la Materia Condensada, Universidad de Sevilla, Aptdo. 1065, 41080 Sevilla, Spain b Energy Technology Division, Argonne National Laboratory, Argonne, IL 60439, USA |
| Abstract: | Rapid changes of oxygen partial pressure (PO2) between 103 and 2.1×104 Pa have been carried out during steady-state plastic deformation of polycrystalline YBa2Cu3O7?x (YBCO) at temperatures between 825 and 900°C. Transient creep was observed after such PO2 changes. The analysis of these creep transients allowed the determination of the chemical diffusion coefficient for reequilibration, which is identical to that found from thermogravimetry and electrical conductivity experiments for oxygen vacancies. |
| Keywords: | Transient creep YBa2Cu3O7?x Diffusion |
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