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Growth of solid solution single crystalsBased on the thermophysical properties of Hg sub 1-x Cd sub x Te alloys, the reasons are discussed for the failure of conventional Bridgman-Stockbarger growth methods to produce high quality homogeneous crystals in the prescence of Earth's gravity. The deleterious effects are considered which arise from the dependence of the thermophysical properties on temperature and composition and from the large amount of heat carried by the fused silica ampules. An improved growth method, developed to optimize heat flow conditions, is described and experimental results are presented. The problems associated with growth in a gravitational environment are discussed. The anticipated advantages of growth in microgravity are given and the implications of the requirements for spaceflight experiments are summarized.
Document ID
19890010926
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Lehoczky, S. L.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Szofran, F. R.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 5, 2013
Publication Date
October 1, 1988
Publication Information
Publication: NASA, Washington, Microgravity Science and Applications Flight Programs, January - March 1987, Selected Papers, Volume 1
Subject Category
Materials Processing
Accession Number
89N20297
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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