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ISRN Materials Science
Volume 2013 (2013), Article ID 108363, 7 pages
http://dx.doi.org/10.1155/2013/108363
Research Article

Study of Mushy-Zone Development in Dendritic Microstructures with Glass-Forming Eutectic Matrices Using Electrostatic Levitation

1Keck Laboratory of Engineering, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA
2Engineering and Science Directorate, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA

Received 23 April 2013; Accepted 19 May 2013

Academic Editors: L. Chang, Y. Sun, R. A. Varin, and H. Yoshihara

Copyright © 2013 Henry Kozachkov et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The coarsening of dendrites in two bulk metallic glass matrix composites was investigated using noncontact techniques in a high vacuum electrostatic levitator. Progressive degrees of coarsening were observed after isothermal holds of varying duration. Specific volume and surface tension during heating and cooling were measured. Hysteresis in specific volume was observed.