Melt-processing of Y-Ba-Cu-O superconductors for improved levitation
Melt processed bulk YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (YBCO) superconductors are of considerable interest in the application of low-friction, superconducting permanent magnet bearings and flywheel-energy-storage devices. The mechanisms of enhanced flux pinning in the melt processed samples has been the subject of many investigations. Fine precipitates of Y{sub 2}BaCuO{sub 5} (211) are considered potential flux-pinning sites by many investigators. Several groups have reported the refinement of 211 precipitates through Pt additions. In this paper, the authors describe the melt processing of YBCO with additives such as 211, Pt, and Ag. Large single domain regions are obtained using small SmBa2Cu3O{sub 7{minus}{delta}} (Sm-123) single crystal seeds. The microstructure and levitation forces are measured and reported here.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10149687
- Report Number(s):
- ANL/ET/CP-81946; CONF-940651-4; ON: DE94011503; TRN: 94:005612
- Resource Relation:
- Conference: International workshop on superconductivity: critical current of high-temperature superconductors and related topics,Kyoto (Japan),6-9 Jun 1994; Other Information: PBD: Apr 1994
- Country of Publication:
- United States
- Language:
- English
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