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Microgravity Science Glovebox Investigations SUBSASolidification Using a Baffle in Sealed Ampoules (SUBSA) is a Microgravity Science Glovebox Investigation manifested for the UF2 flight, on the U.S. Orbiter 111, to the International Space Station (ISS). SUBSA complements the "parent" flight investigation CG13 (Space-and Groundbased Crystal Growth Using a Baffle). During directional solidification, the disk-shaped baffle acts as a partition, creating a small melt zone at the solid-liquid interface. As a result, the level of buoyancy-driven convection at the interface is significantly reduced. In space, the baffle will reduce convection driven by residual micro acceleration. The baffle reduces the Rayleigh number (Ra) of the melt by a factor of 103. The combined effect of the baffle and microgravity will yield a reduction in Ra by a factor of 107 to 109 approaching effectively the acceleration conditions in "nanogravity". The results of ground based tests and numerical modeling will be presented. The furnace for directional solidification (flight hardware and the ground unit) was developed by Tec-Masters Inc. The flight ampoules were produced jointly at Rensselaer, Tec-Masters Inc. and Crystallod Inc.
Document ID
20020022683
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Ostrogorsky, A.
(Rensselaer Polytechnic Inst. Troy, NY United States)
Marin, C.
(Rensselaer Polytechnic Inst. Troy, NY United States)
Vogel, M.
(Rensselaer Polytechnic Inst. Troy, NY United States)
Volz, M. P.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Luz, P.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Jeter, L.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Spivey, Reggie
(Tec-Masters, Inc. Huntsville, AL United States)
Duffar, Thierry
(Commissariat a l'Energie Atomique Grenoble, France)
Geveden, Rex D.
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Subject Category
Space Processing
Meeting Information
Meeting: Conference and Exhibit on International Space Station Utilization
Location: Cocoa Beach, FL
Country: United States
Start Date: October 16, 2001
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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