Critical current degradation and delamination crack observation of epoxy-coated REBCO superconducting tapes after thermal cycles in liquid nitrogen
文献类型：期刊论文
| 作者 | Yang, Zhirong1; Song, Peng1; Guan, Mingzhi2 ; Feng, Feng3; Qu, Timing1
|
| 刊名 | CERAMICS INTERNATIONAL
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 47期号:21页码:29824-29831 |
| 关键词 | Delamination Thermal stress Crack Degradation Impregnation |
| ISSN号 | 0272-8842 |
| DOI | 10.1016/j.ceramint.2021.07.155 |
| 通讯作者 | Qu, Timing(tmqu@mail.tsinghua.edu.cn) |
| 英文摘要 | The delamination and critical current (I-c) degradation caused by thermal stress after epoxy impregnation are threats for the application of REBa2Cu3O7-x(REBCO, RE = Rare earth) superconducting magnets. In this work, two types of REBCO tapes were coated by Stycast 2850FT with controlled coating geometries. Critical currents of coated samples after thermal cycles in liquid nitrogen were measured. I-c degradation was found in coated samples with a free no-coating edge, when the surface coating layer was thicker than 1000 mu m. It was also found that additional edge coating can help to suppress the I-c degradation. Samples with degraded I-c after thermal cycles showed an obvious delamination phenomenon. The morphology and location of delamination cracks were carefully observed by using focused Ion beam, scanning electron microscope, and transmission electron micro-scope. Delamination cracks propagated within the REBCO layer and stopped at reaching the Silver/REBCO interface. Simulations by finite element method suggest that delamination cracks are generated by the stress accumulation within the REBCO layer, which could be reduced by a full epoxy coating on both tape surface and edges. |
| WOS关键词 | CONDUCTOR ; STRESS ; STRENGTH ; BEHAVIOR ; FILMS ; COIL |
| 资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB25000000] ; Na-tional Natural Science Foundation of China[52007089] ; Tribology Science Fund of State Key Laboratory of Tribology, China[SKLT2020B01] |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000697448600004 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | Strategic Priority Research Program of Chinese Academy of Sciences ; Na-tional Natural Science Foundation of China ; Tribology Science Fund of State Key Laboratory of Tribology, China |
| 源URL | [http://119.78.100.186/handle/113462/136539]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Qu, Timing |
| 作者单位 | 1.Tsinghua Univ, Dept Mech Engn, State Key Lab Tribol, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 3.Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Lab Intelligent Mfg & Precis Machining, Shenzhen 518055, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Zhirong,Song, Peng,Guan, Mingzhi,et al. Critical current degradation and delamination crack observation of epoxy-coated REBCO superconducting tapes after thermal cycles in liquid nitrogen[J]. CERAMICS INTERNATIONAL,2021,47(21):29824-29831. |
| APA | Yang, Zhirong,Song, Peng,Guan, Mingzhi,Feng, Feng,&Qu, Timing.(2021).Critical current degradation and delamination crack observation of epoxy-coated REBCO superconducting tapes after thermal cycles in liquid nitrogen.CERAMICS INTERNATIONAL,47(21),29824-29831. |
| MLA | Yang, Zhirong,et al."Critical current degradation and delamination crack observation of epoxy-coated REBCO superconducting tapes after thermal cycles in liquid nitrogen".CERAMICS INTERNATIONAL 47.21(2021):29824-29831. |
入库方式： OAI收割
来源：近代物理研究所
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