High Critical Current in Metal Organic Derived YBCO Films
Final rept. 10 Feb 2007-1 Nov 2009
AMERICAN SUPERCONDUCTOR CORP DEVENS MA
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The Phase II STTR Project focused on optimization of the Metal Organic Deposition MOD process for deposition thick, high critical current YBCO films for use in the Second Generation 2G YBCO coated conductor wires. The project successfully extended the YBCO thickness to 2 microns using a multi-coat process. A critical current of 560 Acm-width 77K, self-field was achieved in a 2 microns thick, rare earth doped YBCO film. The thick film, multi-coat process coating, decomposition and reaction process was successfully transferred to American Superconductors wide-web 40 mm manufacturing line. 2G wires with 1.4 micron thick, rare earth doped YBCO films were produced in lengths to 100 meters. In addition, a modified decomposition process was developed for Metal Organic based YBCO precursors that resulted in an increase in the maximum single-coat thickness to 1.2 microns. A critical current approaching 450 Acm-width was achieved in short length 1.2 microns, single-coat YBCO film.
- Electrical and Electronic Equipment
- Nuclear Physics and Elementary Particle Physics