Diamond Formation in Reshocked Epoxy
ORAL
Abstract
We present measurements of diamond formation in doubly shocked Stycast 1266 epoxy (comprising C, H, Cl, N, and O) using in-situ x-ray diffraction. Epoxy samples were reshocked against a LiF window to 80 and 148 GPa in experiments at the Omega Laser Facility. The pressure and temperature conditions were diagnosed in situ using velocimetry and optical pyrometry, respectively. X-ray diffraction patterns of the compressed epoxy are consistent with cubic diamond. These results, in combination with previous works on CH, CH2, CH4, and methane hydrate, indicate that diamond formation from carbon and hydrogen-based compounds is commonplace at the extreme conditions associated with ice giant planet interiors and that the chemical composition, thermodynamic compression path, and kinetics play an important role.
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Publication: M. C. Marshall et. al, J. Appl. Phys. 131, 085904 (2022).
Presenters
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Michelle C Marshall
University of Rochester
Authors
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Michelle C Marshall
University of Rochester
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Martin G Gorman
Lawrence Livermore Natl Lab
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Danae Polsin
Laboratory for Laser Energetics, University of Rochester
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Jon H Eggert
Lawrence Livermore Natl Lab
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Mary Kate Ginnane
University of Rochester
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J. Ryan Rygg
University of Rochester, Laboratory for Laser Energetics, University of Rochester
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Gilbert W Collins
University of Rochester Laboratory for Laser Energetics, University of Rochester, University of Rochester, Laboratory for Laser Energetics, Laboratory for Laser Energetics, University of Rochester
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Lara Leininger
Lawrence Livermore Natl Lab