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Effect of applied magnetic fields during directional solidification of eutectic Bi-MnSamples of rod eutectics Bi/MnBi were directionally solidified in a growth-up Bridgman-Stockbarger configuration in the presence of a transverse magnetic field up to 3 kg to determine whether gravity-driven convective effects could be reduced or eliminated. The experiments were carried out over a range of furnace velocities, V, of 0.2 to 50 cm per hour with a thermal gradient at the liquid-solid interface of 100 C/cm and 150 C/cm. Morphological, thermal and magnetic analyses were carried out on samples grown with and without an applied magnetic field. For samples grown at V greater than 3 cm per hour in a transverse magnetic field, reduced mean rod diameter and interrod spacing occurred as well as undercooling and increased coercive strength. The data agreed with that obtained for low-g growth at 50 cm per hour and 30 cm per hour.
Document ID
19850035930
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Decarlo, J. L.
(Grumman Aerospace Corp. Bethpage, NY, United States)
Pirich, R. G.
(Grumman Solid State Physics and Chemistry Laboratory Bethpage, NY, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1984
Publication Information
Publication: Metallurgical Transactions A - Physical Metallurgy and Materials Science
Volume: 15A
ISSN: 0360-2133
Subject Category
Metallic Materials
Accession Number
85A18081
Funding Number(s)
CONTRACT_GRANT: NAS8-34922
Distribution Limits
Public
Copyright
Other

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