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Modeling the Freezing of SN in High Temperature FurnacesPresently, crystal growth furnaces are being designed that will be used to monitor the crystal melt interface shape and the solutal and thermal fields in its vicinity during the directional freezing of dilute binary alloys, To monitor the thermal field within the solidifying materials, thermocouple arrays (AMITA) are inserted into the sample. Intrusive thermocouple monitoring devices can affect the experimental data being measured. Therefore, one objective of this work is to minimize the effect of the thermocouples on the data generated. To aid in accomplishing this objective, two models of solidification have been developed. Model A is a fully transient, one dimensional model for the freezing of a dilute binary alloy that is used to compute temperature profiles for comparison with measurements taken from the thermocouples. Model B is a fully transient two dimensional model of the solidification of a pure metal. It will be used to uncover the manner in which thermocouple placement and orientation within the ampoule breaks the longitudinal axis of symmetry of the thermal field and the crystal-melt interface. Results and conclusions are based on the comparison of the models with experimental results taken during the freezing of pure Sn.
Document ID
20020043276
Acquisition Source
Marshall Space Flight Center
Document Type
Other
Authors
Brush, Lucien
(Washington Univ. Seattle, WA United States)
Date Acquired
August 20, 2013
Publication Date
October 1, 1999
Publication Information
Publication: 1999 NASA/ASEE Summer Faculty Fellowship Program
Subject Category
Solid-State Physics
Funding Number(s)
CONTRACT_GRANT: NGT8-52874
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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