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Proceedings Paper

Development of an electrostatic levitator and containerless processing of metals, alloys, and semiconductors
Author(s): Won-Kyu Rhim
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Paper Abstract

Present capability of the High Temperature Electrostatic Levitator (HTESL) at JPL for the containerless materials processing is described. The capability includes the measurements of various thermophysical properties and the studies of undercooling and nucleation phenomena. The thermophysical reports that can be measured include the density, the volume expansion, and ratio between the specific heat capacity and the hemispherical total emissivity, the surface tension,the viscosity, the spectral emissivity, and the electrical resistivity. For liquids where the Wiedemann-Franz-Lorenz law applies, their thermal conductivities can be determined indirectly from the electrical resistivities. The capability of determining the statistical nature of nucleation and the Temperature-Time-Transformation (T-T-T)curves has also been demonstrated. Experimental results on pure metals, alloys, and semiconductors were used to support the argument.

Paper Details

Date Published: 6 July 1999
PDF: 12 pages
Proc. SPIE 3792, Materials Research in Low Gravity II, (6 July 1999); doi: 10.1117/12.351285
Show Author Affiliations
Won-Kyu Rhim, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 3792:
Materials Research in Low Gravity II
Narayanan Ramachandran, Editor(s)

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