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Ultrasonic
Drawing of Advanced A15 Strand, Piece-Length Enhancement, Bonding, and
Stabilizer Attachment--Global
Research & Development, Inc., 110 E. Canal Street, Troy, OH
45373; 937-332-0348
Dr.
Karl Graff, Principal Investigator, karl_graff@ewi.org
Mr.
Michael Tomsic, Business Official, tomsic@voyager.net
DOE
Grant No. DE-FG02-01ER83198
Amount:
$100,000
Future high field (15T+) dipole magnets will require
higher performance superconductors, and long lengths will be needed to reduce
the cost of these conductors. The
A15-type conductors are the most likely superconductors to fulfill this need,
but it is very difficult to process the wire without breaks, especially when
billet sizes are increased to produce 5-25 km lengths.
This processing difficulty is related to the hardness of the
multifilamentary composite and the bonding of the filaments.
This project will investigate an ultrasonic processing technique to
reduce drawing forces and increase bonding between the filaments.
Phase I will demonstrate the ultrasonic wire drawing of A15-type
superconductors. The benefit of
reducing drawing forces and increasing the bonding between filaments of the
multifilamentary composite wires will be documented. Both Nb3Sn and Nb3Al wires will be
evaluated.
Commercial Applications And Other Benefits as described by awardee: Although the largest market should be for accelerator and fusion magnets, high field magnets (above 5 tesla) should also have applicability for MRI, NMR, high gradient magnetic separators, and SMES applications.