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Halide eutectic growth experiment MA-131Fiberlike sodium chloride/lithium fluoride eutectic mixtures have been produced on earth and in space by the directional solidification technique. Macroscopic and microscopic examinations were made on longitudinal and transverse sections of Apollo Soyuz Test Project space grown and earth grown ingots. It was found that samples grown in space have a higher percentage of fibers alined with the growth axis. The enhanced alinement of fibers is attributed to the absence of convection currents in the liquid during solidification. Optical transmittance measurements of transverse sections of the space grown and earth grown ingots were performed with an infrared spectrometer. For a given sample thickness, the highest transmittance was obtained from ingots grown in space. For samples of different thicknesses, grown either in space or on earth, it was found that the thinner the sample, the higher the transmittance. This is in agreement with the general optical property of transparent materials.
Document ID
19760016014
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Yue, A. S.
(California Univ. Los Angeles, CA, United States)
Yue, B. K.
(California Univ. Los Angeles, CA, United States)
Lee, J. Y. M.
(California Univ. Los Angeles, CA, United States)
Date Acquired
August 8, 2013
Publication Date
February 1, 1976
Publication Information
Publication: NASA. Lyndon B. Johnson Space Center Apollo-Soyuz Test Project
Subject Category
Composite Materials
Accession Number
76N23102
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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