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Superconducting properties of Pb-Sn-In alloys directionally solidified aboard SkylabSuperconducting alloys of Pb-Sn-In were directionally solidified in the absence of gravity-induced convection and segregation by processing in a near weightless condition aboard Skylab. Lead-rich and tin-rich lamellar structures were obtained with both high and low G/R (temperature gradient/solidification rate) samples processed at 0-g and at 1-g in a ground-based laboratory. Thinner, higher density lamellae were found with the 0-g specimens. Magnetization curves at 4.2 K showed hysteresis effects with large areas under the curves indicating magnetic flux pinning by the normal state tin-rich phase.
Document ID
19750048816
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Anderson, W. T., Jr.
Reger, J. L.
(TWR Systems Group Redondo Beach, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
May 1, 1975
Subject Category
Solid-State Physics
Report/Patent Number
AIAA PAPER 75-694
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics, Thermophysics Conference
Location: Denver, CO
Start Date: May 27, 1975
End Date: May 29, 1975
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
75A32888
Funding Number(s)
CONTRACT_GRANT: NAS8-28309
Distribution Limits
Public
Copyright
Other

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