Insentropic compression of solid using pulsed magnetic loading

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Shock loading techniques are often used to determine material response along a specific pressure loading curve referred to as the Hugoniot. However, many technological and scientific applications require accurate determination of dynamic material response that is off-Hugoniot, covering large regions of the equation-of-state surface. Unloading measurements from the shocked state provide off-Hugoniot information, but experimental techniques for measuring compressive off-Hugoniot response have been limited. A new pulsed magnetic loading technique is presented which provides previously unavailable information on isentropic loading of materials to pressures of several hundred kbar. This smoothly increasing pressure loading provides a good approximation to the high-pressure ... continued below

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Medium: P; Size: 57 pages

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HALL,CLINT A.; ASAY,JAMES R.; STYGAR,WILLIAM A.; SPIELMAN,RICK B.; ROSENTHAL,STEPHEN E.; KNUDSON,MARCUS D. et al. April 18, 2000.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Shock loading techniques are often used to determine material response along a specific pressure loading curve referred to as the Hugoniot. However, many technological and scientific applications require accurate determination of dynamic material response that is off-Hugoniot, covering large regions of the equation-of-state surface. Unloading measurements from the shocked state provide off-Hugoniot information, but experimental techniques for measuring compressive off-Hugoniot response have been limited. A new pulsed magnetic loading technique is presented which provides previously unavailable information on isentropic loading of materials to pressures of several hundred kbar. This smoothly increasing pressure loading provides a good approximation to the high-pressure material isentrope centered at ambient conditions. The approach uses high current densities to create ramped magnetic loading to a few hundred kbar over time intervals of 100--200 ns. The method has successfully determined the isentropic mechanical response of copper to about 200 kbar and has been used to evaluate the kinetics of the alpha-epsilon phase transition occurring in iron at 130 kbar. With refinements in progress, the method shows promise for performing isentropic compression experiments to multi-Mbar pressures.

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Medium: P; Size: 57 pages

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OSTI as DE00754321

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  • Journal Name: Review of Scientific Instruments (American Physical Society); Other Information: Submitted to Review of Scientific Instruments (American Physical Society)

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  • Report No.: SAND2000-0983J
  • Report No.: 0000035158-000
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 754321
  • Archival Resource Key: ark:/67531/metadc712030

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  • April 18, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 13, 2016, 2:34 p.m.

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HALL,CLINT A.; ASAY,JAMES R.; STYGAR,WILLIAM A.; SPIELMAN,RICK B.; ROSENTHAL,STEPHEN E.; KNUDSON,MARCUS D. et al. Insentropic compression of solid using pulsed magnetic loading, article, April 18, 2000; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc712030/: accessed July 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.