Strain characteristics of critical current in RABiTS/Y-Ba-Cu-O coated conductors
| Autor: | K. Kasaba, Kikuo Itoh, Y. Ishikawa, T. Takahashi, Kazumune Katagiri, Tsuneo Kuroda, Y. Tsunematsu |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Strain (chemistry) Energy Engineering and Power Technology Bending Condensed Matter Physics Electronic Optical and Magnetic Materials Conductor Ultimate tensile strength Degradation (geology) Texture (crystalline) Electrical and Electronic Engineering Composite material Layer (electronics) Electrical conductor |
| Zdroj: | Physica C: Superconductivity. 468:1697-1701 |
| ISSN: | 0921-4534 |
| Popis: | The strain dependence of critical current I c of a commercial RABiTS (Rolling-Assisted Biaxially Textured Substrates) YBCO coated conductor tape with Cu stabilizing layers on both surfaces has been studied by two kinds of bending apparatus and a tensile apparatus at 77 K and 293 K. According to the voltage measurements using multi-taps in the longitudinal direction, local I c degradation was also observed. In the continuous bending-tension test at 77 K, in which YBCO layer was subjected to the tensile strain, I c began to decrease rapidly beyond the strain of 0.6% after initial moderate degradation. In the continuous bending-compression tests, the I c began to decrease rapidly beyond the strain of 0.4%. The strain for the beginning of degradation of I c obtained by tensile tests at 77 K was almost the same as that by the bending-tension tests. Bending test at RT using FRP holders showed I c degradation not so different from that by the continuous bending tests at 77 K. In all tests, the I c initially degraded locally irrespective of the position in the specimens. Furthermore, I c degradation by repeated bending was also studied. |
| Databáze: | OpenAIRE |
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