Characterizing the emissivity of materials under dynamic compression (final report for LDRD project 79877). | Zendy

D. H. Dolan | Zendy

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Characterizing the emissivity of materials under dynamic compression (final report for LDRD project 79877).

Author(s) -

D. H. Dolan

Publication year - 2007

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/922084

Subject(s) - emissivity , black body radiation , pyrometer , infrared , materials science , synchrotron radiation , optics , radiation , physics , temperature measurement , thermodynamics

Temperature measurements are crucial to equation of state development, but difficult to perform reliably. In the case of infrared pyrometry, a large uncertainty comes from the fact that sample emissivity (the deviation from a blackbody) is unknown. In this project, a method for characterizing the emissivity of shocked materials was developed. By coupling infrared radiation from the National Synchrotron Light Source to a gas gun system, broad spectrum emissivity changes were studied to a peak stress of 8 GPa. Emissivity measurements were performed on standard metals (Al, Cr, Cu, and Pt) as well as a high emissivity coating developed at Sandia

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