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Novel Directional Solidification of Hypermonotectic AlloysThere are many metal alloy systems that separate into two different liquids upon cooling from a higher temperature. Uniform microstructural development during solidification of these immiscible liquids on Earth is hampered by inherent density differences between the phases. Microgravity processing minimizes settling but segregation still occurs due to gravity independent wetting and coalescence phenomena. Experiments with the transparent organic, metal analogue, succinonitrile-glycerol system were conducted in conjunction with applied ultrasonic energy. The processing parameters associated with this technique have been evaluated in view of optimizing dispersion uniformity. Characterization of the experimental results in terms of an initial modeling effort will also be presented.
Document ID
20000072883
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Grugel, Richard N.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Fedoseyev, A. I.
(Alabama Univ. Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 2000
Subject Category
Metals And Metallic Materials
Meeting Information
Meeting: Materials Science Conference
Location: Huntsville, AL
Country: United States
Start Date: June 6, 2000
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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