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Melting at the Limit of Superheating

Luo, Sheng-Nian and Ahrens, Thomas J. and Swift, Damian C. (2004) Melting at the Limit of Superheating. In: Shock Compression of Condensed Matter - 2003: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. American Institute of Physics Conference Proceedings. No.706. American Institute of Physics , Melville, NY, pp. 172-175. ISBN 0735401810 http://resolver.caltech.edu/CaltechAUTHORS:LUOaipcp04a

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Abstract

Theories on superheating-melting mostly involve vibrational and mechanical instabilities, catastrophes of entropy, volume and rigidity, and nucleation-based kinetic models. The maximum achievable superheating is dictated by nucleation process of melt in crystals, which in turn depends on material properties and heating rates. We have established the systematics for maximum superheating by incorporating a dimensionless nucleation barrier parameter and heating rate, with which systematic molecular dynamics simulations and dynamic experiments are consistent. Detailed microscopic investigation with large-scale molecular dynamics simulations of the superheating-melting process, and structure-resolved ultrafast dynamic experiments are necessary to establish the connection between the kinetic limit of superheating and vibrational and mechanical instabilities, and catastrophe theories.


Item Type:Book Section
Additional Information:©2004 American Institute of Physics This work has been supported by U.S. NSF Grant EAR-0207934. S.-N. Luo is sponsored by a Director’s Post-doctoral Fellowship at Los Alamos National Laboratory (P-24 and EES-11).
Subject Keywords:melting; heat transfer; nucleation; mechanical stability; entropy; heating; molecular dynamics method
Record Number:CaltechAUTHORS:LUOaipcp04a
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:LUOaipcp04a
Alternative URL:http://dx.doi.org/10.1063/1.1780210
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2234
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:17 Mar 2006
Last Modified:26 Dec 2012 08:48

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