J(C) ENHANCEMENT OF YB(A)(2)CU(3)O(7-X) FIBERS USING LASER ZONE REFINEMENT

Award Information
Agency:
Department of Defense
Branch
Defense Advanced Research Projects Agency
Amount:
$49,999.00
Award Year:
1988
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
9158
Agency Tracking Number:
9158
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
830 Boston Turnpike, Shrewsbury, MA, 01545
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
DR ERIC GREGORY
(617) 842-0174
Business Contact:
() -
Research Institute:
n/a
Abstract
TREMENDOUS EXCITEMENT AND INTEREST HAS BEEN GENERATED IN RECENT MONTHS OVER THE DISCOVERY OF THE YBA(2)CU(3)O(7-X) ("123"), LIQUID NITROGEN SUPERCONDUCTORS. HOWEVER, THIS EXITEMENT HAS BEEN TEMPERED BY THE INABILITY TO ACHIEVE LARGE TRANSPORT J(C)'S IN BULK-PROCESSED POLYCRYSTALLINE MATERIALS BECAUSE OF WEAK LINK BEHAVIOR. THESE WEAK LINKS HAVE TWO POSSIBLE ORIGINS; FIRSTLY, THE PRESENCE OF NONSUPERCONDUCTING PHASES AT THE GRAIN BOUNDARIES AND SECONDLY, THE INTRINSIC ANISTROPY OF THE SUPERCONDUCTIVITY IN THE HIGH T(C) SUPERCONDUCTORS. IN THIS PHASE I PROPOSAL CONVENTIONAL ZONE REFINEMENT TECHNIQUES WILL BE USED TO FABRICATE "123" CERAMIC FIBERS WITH CLEAN, TEXTURED GRAINS. WE WILL LASER ZONE REFINE RODS OF THE "123" MATERIALS FABRICATED AT SUPERCON INC., AND STUDY IN DETAIL THE EFFECTS OF THIS PROCESS ON THE TRANSPORT CRITICAL CURRENTS IN YBA(2)CU(3)O(7-X) SUPERCONDUCTING COMPOSITES.

* information listed above is at the time of submission.

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