Measurement of the shock-heated melt curve of lead using pyrometry and reflectometry.

Autor: Partouche-Sebban, D., Pélissier, J. L., Abeyta, F. G., Anderson, W. W., Byers, M. E., Dennis-Koller, D., Esparza, J. S., Hixson, R. S., Holtkamp, D. B., Jensen, B. J., King, J. C., Rigg, P. A., Rodriguez, P., Shampine, D. L., Stone, J. B., Westley, D. T., Borror, S. D., Kruschwitz, C. A.
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Zdroj: Journal of Applied Physics; 2/15/2005, Vol. 97 Issue 4, p043521, 11p, 4 Black and White Photographs, 7 Diagrams, 4 Charts, 7 Graphs
Abstrakt: Data on the high-pressure melting temperatures of metals is of great interest in several fields of physics including geophysics. Measuring melt curves is difficult but can be performed in static experiments (with laser-heated diamond-anvil cells, for instance) or dynamically (i.e., using shock experiments). However, at the present time, both experimental and theoretical results for the melt curve of lead are at too much variance to be considered definitive. As a result, we decided to perform a series of shock experiments designed to provide a measurement of the melt curve of lead up to about 50 GPa in pressure. At the same time, we developed and fielded a reflectivity diagnostic, and conducted measurements on tin as well. The results show that the melt curve of lead is somewhat higher than the one previously obtained with static compression and heating techniques. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index