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Published July 20, 2004 | public
Book Section - Chapter Open

Time-Resolved X-Ray Diffraction Investigation of Superheating-Melting of Crystals under Ultrafast Heating

Abstract

The maximum superheating of a solid prior to melting depends on the effective dimensionless nucleation energy barrier, heterogeneities such as free surfaces and defects, and heating rates. Superheating is rarely achieved with conventional slow heating due to the dominant effect of heterogeneous nucleation. In present work, we investigate the superheating-melting behavior of crystals utilizing ultrafast heating techniques such as exploding wire and laser irradiation, and diagnostics such as time-resolved X-ray diffraction combined with simultaneous measurements on voltage and current (for exploding wire) and particle velocity (for laser irradiation). Experimental designs and preliminary results are presented.

Additional Information

© 2004 American Institute of Physics. S.-N. Luo is sponsored by a Director's Postdoctoral Fellowship at Los Alamos National Laboratory (P-24 and EES-11). We appreciate the kind permission of QinetiQ for using their exploding wire data.

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