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Shock-induced melting and shear banding in single-crystal NaCl

Schmitt, Douglas R. and Ahrens, Thomas J. and Svendsen, Bob (1988) Shock-induced melting and shear banding in single-crystal NaCl. Journal of Applied Physics, 63 (1). pp. 99-106. ISSN 0021-8979. http://resolver.caltech.edu/CaltechAUTHORS:SCHMjap88

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Abstract

Radiative color temperatures were measured in single-crystal sodium chloride under shock compression parallel to [100] over a pressure range from 20 to 35 GPa. Color temperatures from 2500 to 4500 K and emittances from 0.003 to 0.3 were determined by fitting observed spectra (450–850 nm) to the Planck greybody radiation law. These data support a heterogeneous shock deformation model of shocked halite in this pressure range. A 2500-K temperature rise, of unknown origin, is observed over the B1–B2 mixed phase region from 25 to 30 GPa. Assuming that shock deformation occurs via yielding in localized planar zones which become melt and the melting temperature at high pressure controls the temperature, we infer that the temperature of the B2 fusion curve from 30 to 35 GPa rises from 3200 to 3300 K. The B1–B2-liquid triple point is predicted to be at a temperature of 2250 K and 23.5 GPa.


Item Type:Article
Additional Information:Copyright © 1988 American Institute of Physics. Received 22 June 1987; accepted 1 September 1987. E. Gelle, M. Long, C. Manning, and L. Young provided important technical assistance. The assistance of G. Miller is greatly appreciated. Discussions and reviews of D. Stevenson were very helpful. This work was supported under NSF Grant No. EAR-86-08249 and NASA Contract No. NGL-05-002-105. D. Schmitt gratefully acknowledges the support of the Sir Lougheed Graduate Fellowship, Alberta Heritage Scholarship Fund, from 19984 to 1986, Contribution 4489, California Institute of Technology, Pasadena, California.
Subject Keywords:SODIUM CHLORIDES, MELTING, CRYSTAL GROWTH FROM MELTS, COMPRESSION, DEFORMATION, COLOR, SHOCK WAVES, TEMPERATURE DISTRIBUTION, EQUATIONS OF STATE
Record Number:CaltechAUTHORS:SCHMjap88
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SCHMjap88
Alternative URL:http://dx.doi.org/:10.1063/1.340469
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10014
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:05 Apr 2008
Last Modified:26 Dec 2012 09:55

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