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Flux Pinning Additions to
Increase Jc Performance in BSCCO-2212 Round Wire for
Very High Field Magnets--Superconductive
Components Inc. dba SCI Engineered Materials, 2839
Charter Street, Columbus, OH 43228;
614-486-0261; www.superconductivecomp.com
Dr. Scott Campbell, Principal
Investigator, scott@sciengineeredmaterials.com
Dr. Scott Campbell, Business
Official, scott@sciengineeredmaterials.com
DOE Grant No. DE-FG02-07ER84831
Amount: $99,887
With
the drive towards higher field dipole magnets – the engineering goal for the
near term (7-10 years) is at least 15 T – the material requirements for superconductors
are becoming stringent. While the
processing and application of existing metal-based materials have advanced to a
significantly higher level than those of their ceramic counterparts, which can
sustain high critical temperature (the highest temperature at which the
material can maintain superconductivity), the ceramics have the advantage of an
extremely high-critical field values.
For this reason, the ceramic superconductor, bismuth strontium calcium
copper oxide (BSCCO-2212) in the form of a multifilamentary
Ag alloy composite, is beginning to attract interest for future extremely
high-field magnets or magnet-insert coils for 4.2K operation. This project will develop a commercially
viable, BSCCO-2212/Ag composite multifilamentary
round wire with a Je value equal to or exceeding 600
A/mm2 at 12T and 4.2K. In Phase I,
several additive materials will be investigated and selected for further work,
based on the microstructure of the BSCCO-2212 layer that is formed by using
spin coating and melt processing.
Additives that provide promising microstructures in spin coated samples
will be evaluated for superconducting properties at a
4.2K self-field in dip-coated tape form.
After an evaluation at 4.2K and a microstructural
evaluation, promising candidates will be selected for scale-up in Phase II to 1
km length round wires.
Commercial
Applications and other Benefits as described by the awardee: The
initial commercial application of BSCCO-2212/Ag composite wire should be in
high field magnets for high energy physics experimentation. Other potential applications would exist
anywhere high field magnets are required, such as medical MRI.