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Electrical properties of Al-In-Sn alloys directionally solidified in high and low gravitational fields

Author
Curreri, P. A.
Published
Oct 1, 1986.
Physical Description
1 electronic document
Additional Creators
Wu, M. K., Kaukler, W. F., and Ashburn, J. R.
Online Version

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Restrictions on Access
Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
Summary
The Al-In-Sn alloys were directionally solidified in the NASA KC-135 aircraft which flies a series of parabolas to generate high (high-g) and low (low-g) gravity forces parallel to the longitudinal growth axis. Thus, for a given sample, successive sections can be identified which were solidified in high-g and low-g. Measurements of the electronic properties of the samples reveal that: the resistivity of the low-g sections is larger (about a factor of 10) than that of the high-g sections; the low-g sections behave conductively like a semi-metal, while the high-g sections are essentially metallic; and both high-g and low-g sections are superconducting but the superconducting transition temperature of the low-g sections is 1 K higher than that of the high-g sections.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19870007467.
Accession ID: 87N16900.
NAS 1.15:86569.
NASA-TM-86569.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15700637