ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
We report on recent progress towards the continuous deposition of YBCO CoatedConductors (CC) by thermal co-evaporation. This is an attractive vacuum technique thanks to thesimplicity, low cost and intrinsic uniformity over large areas. Recently, we published the in situpreparation route of 1 μm thick superconducting YBCO films deposited onto CeO2 buffered Nibiaxially textured tapes using a reel-to-reel system; end-to-end critical current densities Jc's at 77 Kand self-field, measured by transport measurements are in the 1-2 MA/cm2 range for 1 m. longsamples, with zero-resistance Tc= 87 K and transition widths DTc〈3 K.In spite of the very good CC’s performances reported by a number of laboratories all over theworld, several steps must be optimized in order to limit the CC production costs, in particularconcerning the complexity of the CC architecture and the choice and optimization of the YBCOdeposition technique.We specifically address the following critical points regarding: 1) the in situ oxidation of the YBCOlayer using a novel supersonic nozzle, 2) the deposition by thermal or e-beam evaporation of thickcrack-free CeO2 buffer layers and 3) the scaling-up of the deposition process using a new multichambersystem
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.47.17.pdf
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