Diamond formation in double-shocked epoxy to 150 GPa
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2022-02-24 |
| Journal | Journal of Applied Physics |
| Authors | M. C. Marshall, M. G. Gorman, D. N. Polsin, J. H. Eggert, Mary Kate Ginnane |
| Institutions | Energetics (United States), Lawrence Livermore National Laboratory |
| Citations | 11 |
Abstract
Section titled “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 pressures between 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 (Fd3¯m), indicating that diamond can precipitate not only from twice-shocked CH polystyrene [Kraus et al. Nat. Astron. 1, 606 (2017)] at these conditions but also from twice-shocked CH polymers with the addition of oxygen, nitrogen, and chlorine. These results, in combination with previous works on CH, CH2, CH4, and methane hydrate, support that diamond often, but not always, forms from CH-based compounds at extreme pressures and temperatures, indicating that the chemical composition, thermodynamic compression path, and kinetics play an important role.
Tech Support
Section titled “Tech Support”Original Source
Section titled “Original Source”References
Section titled “References”- 2022 - Diamond and methane formation from the chemical decomposition of polyethylene at high pressures and temperatures [Crossref]