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Shock Temperature of Stainless Steel and a High Pressure - High Temperature Constraint on Thermal Diffusivity of Al_2O_3

Gallagher, Kathleen G. and Bass, Jay D. and Ahrens, Thomas J. and Fitzner, M. and Abelson, J. R. (1994) Shock Temperature of Stainless Steel and a High Pressure - High Temperature Constraint on Thermal Diffusivity of Al_2O_3. In: High-pressure science and technology, 1993. AIP Conference Proceedings. No.309. American Institute of Physics , Melville, NY, pp. 963-966. ISBN 1-56396-219-5. https://resolver.caltech.edu/CaltechAUTHORS:20141022-133357464

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Abstract

Time dependent shock temperatures were measured for stainless steel (SS) films in contact with transparent anvils. The anvil/window material was the same as the driver material so that there would be symmetric heat flow from the sample. Inferred Hugoniot temperatures, T_h , of 5800–7500 K at 232–321 GPa are consistent with previous measurements in SS. Temperatures at the film‐anvil interface (T_i ), which are more directly measured than T_h , indicate that T_i did not decrease measurably during the approximately 250 ns that the shock wave was in Al_2O_3 or LiF anvils. Thus an upper bound is obtained for the thermal diffusivity of Al_2O_3 at the metal/anvil interface at 230 GPa and 6000K of κ≤0.00096 cm_2/s. This is a factor of 17 lower than previously calculated values, resulting in a decrease of the inferred T_h by 730 k. The observed shock temperatures are combined with temperatures calculated from measured Hugoniots and are used to calculate thermal conductivities of Al_2O_3. Also we note that since there was no measurable intensity decrease during the time when the shock wave propagated through the window, we infer from this that Al_2O_3 remained transparent while in the shocked state. Thus sapphire is a good window material to at least 250 GPa for shock temperature measurements for metals.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.46195PublisherArticle
http://dx.doi.org/10.1063/1.46195DOIArticle
Alternate Title:Shock Temperature of Stainless Steel and a High Pressure - High Temperature Constraint on Thermal Diffusivity of Al2O3
Additional Information:© 1994 American Institute of Physics. Published online 10 July 1994.
Series Name:AIP Conference Proceedings
Issue or Number:309
Record Number:CaltechAUTHORS:20141022-133357464
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141022-133357464
Official Citation:Shock temperature of stainless steel and a high pressure—high temperature constraint on thermal diffusivity of Al2O3 Kathleen G. Gallagher, Jay D. Bass, Thomas J. Ahrens, M. Fitzner and J. R. Abelson AIP Conf. Proc. 309, 963 (1994); http://dx.doi.org/10.1063/1.46195
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50687
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:22 Oct 2014 21:41
Last Modified:03 Oct 2019 07:25

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