CONTINUOUS EXTRUSION OF NB3SN SUPERCONDUCTORS

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$357,000.00
Award Year:
1988
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
7034
Agency Tracking Number:
7034
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
5 Commerce Dr, I-95 Industrial Park, Aston, PA, 19014
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Mr Jaydee W Miller
(215) 497-1743
Business Contact:
() -
Research Institute:
n/a
Abstract
THE PUSH FOR HIGHER FIELD MAGNETS FOR APPLICATIONS SUCH AS FUSION MACHINES HAS DRIVEN THE SEARCH FOR A COST-EFFECTIVE, RELIABLE MANUFACTURING PROCESS FOR HIGH FIELD, HIGH CURRENT DENSITY SUPERCONDUCTORS. THE DESIGN/PROCESS CHOICES THAT THE MANUFACTURER OF FILAMENTARY COMPOSITES MUST MAKE USUALLY REQUIRE A COMPROMISE BETWEEN CURRENT DENSITY AND PIECE LENGTH. THE REQUIREMENTS FOR SUPERCONDUCTOR PERFORMANCE, FOR EXAMPLE THE HIGHLY DEFORMED MICROSTRUCTURES IN NBTI COMPOSITES OR THE VERY DIFFERENT MECHANICAL PROPERTIES OF THE COMPONENTS IN NB3SN COMPOSITES, PLACE STRINGENT RESTRICTIONS ON THE AREA REDUCTION PROCESS. WIRE DRAWING IS COST-EFFECTIVE BECAUSE IT CAN BE DONE SEMICONTINUOUSLY; HOWEVER, THE HIGH TENSILE FORCES INVOLVED ARE NOT IDEAL FOR PROCESSING COMPOSITES WITH WIDELY DIFFERING COMPONENTS. CONVENTIONAL EXTRUSION HOLDS THE ADVANTAGES OF LARGE AREA REDUCTION AND COMPRESSIVE FORCES, BUT IS SEVERELY LIMITED IN PIECE LENGTH, HENCE MUST BE DONE AT LARGE DIAMETERS. A HIGHLY PROMISING ALTERNATIVE APPEARS TO BE A CONTINUOUS EXTRUSION PROCESS THAT ALLOWS LARGE AREA REDUCTIONS USING COMPRESSIVE FORCES, SMALL STARTING DIAMETERS, AND UNLIMITED LENGTHS. THIS STUDY WILL EXPLORE THE FEASIBILITY OF CONTINUOUS EXTRUSION OF DISTRIBUTED SN NB3SN COMPOSITES, A DEMANDING MATERIAL TO PROCESS BECAUSE OF THE USE OF PURE TIN ALONG WITH NIOBIUM AND COPPER. THE EFFECTS OF THE EXTRUSION RATIO, EXTRUSION RATE, DIE ANGLE, AND LUBRICANT ON THE FILAMENT QUALITY, METALLURGICAL BONDING, AND SUBSEQUENT DRAWABILITY OF THE COMPOSITE WILL BE STUDIED.

* information listed above is at the time of submission.

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