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Direct Observation of Controlled Melting and Resolidification of Succinonitrile Mixtures in a Microgravity EnvironmentIn support of the Pore Formation and Mobility Investigation (PFMI) direct observation of experiments on the controlled melting and subsequent resolidification of succinonitrile were conducted in the glovebox facility (GBX) of the International Space Station (ISS). Samples were prepared on ground by filling glass tubes, 1 cm ID and approximately 30 cm in length, with pure succinonitrile (SCN) and SCN-Water mixtures under 450 millibar of nitrogen. Experimental processing parameters of temperature gradient and translation speed, as well as camera settings, were remotely monitored and manipulated from the ground Telescience Center (TSC) at the Marshall Space Flight Center. Sample temperatures are monitored by six in situ thermocouples. Real time visualization during melt back revealed bubbles of different sizes initiating at the solid/liquid interface, their release, interactions, and movement into the temperature field ahead of them. Subsequent re-solidification examined planar interface breakdown and the transition to steady-state dendritic growth. A preliminary analysis of the observed phenomena and its implication to future microgravity experiments is presented and discussed.
Document ID
20040047265
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Grugel, R. N.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Anilkumar, A. V.
(Vanderbilt Univ. Nashville, TN, United States)
Lee, C. P.
(Engineering Sciences, Inc. Huntsville, AL, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Metals And Metallic Materials
Meeting Information
Meeting: Minerals, Metals & Materials Society (TMS) Annual Meeting
Location: Charlotte, NC
Country: United States
Start Date: March 14, 2004
End Date: March 18, 2004
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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