@article{41d22ce3176e4401bd3f7e3d49d55094,
title = "Structure and density of silicon carbide to 1.5 TPa and implications for extrasolar planets",
abstract = "There has been considerable recent interest in the high-pressure behavior of silicon carbide, a potential major constituent of carbon-rich exoplanets. In this work, the atomic-level structure of SiC was determined through in situ X-ray diffraction under laser-driven ramp compression up to 1.5 TPa; stresses more than seven times greater than previous static and shock data. Here we show that the B1-type structure persists over this stress range and we have constrained its equation of state (EOS). Using this data we have determined the first experimentally based mass-radius curves for a hypothetical pure SiC planet. Interior structure models are constructed for planets consisting of a SiC-rich mantle and iron-rich core. Carbide planets are found to be ~10% less dense than corresponding terrestrial planets.",
author = "D. Kim and Smith, {R. F.} and Ocampo, {I. K.} and F. Coppari and Marshall, {M. C.} and Ginnane, {M. K.} and Wicks, {J. K.} and Tracy, {S. J.} and M. Millot and A. Lazicki and Rygg, {J. R.} and Eggert, {J. H.} and Duffy, {T. S.}",
note = "Funding Information: We thank Carol Davis (LLNL) and the staff of the Laboratory for Laser Energetics for expert experimental assistance. The Lawrence Livermore National Laboratory AnalyzeVISAR and AnalyzePXRDIP codes were used for data analysis. The authors acknowledge the use of Princeton?s Imaging and Analysis Center and Bolton Howes for assistance with porosity estimation. Portions of this work were performed under the auspices of the US Department of Energy by Lawrence Livermore National Laboratory under contract number DE-AC52-07NA27344. The research and materials incorporated in this work were partially developed at the National Laser Users? Facility at the University of Rochester?s Laboratory for Laser Energetics, with financial support from the U.S Department of Energy under Cooperative Agreement DE-NA0001944 and DE-NA0003611. Additional support was provided by the National Science Foundation EAR-1644614 and the Princeton Center for Complex Materials (PCCM), and a National Science Foundation (NSF)-MRSZECZ program (DRM-2011750). Funding Information: We thank Carol Davis (LLNL) and the staff of the Laboratory for Laser Energetics for expert experimental assistance. The Lawrence Livermore National Laboratory AnalyzeVISAR and AnalyzePXRDIP codes were used for data analysis. The authors acknowledge the use of Princeton{\textquoteright}s Imaging and Analysis Center and Bolton Howes for assistance with porosity estimation. Portions of this work were performed under the auspices of the US Department of Energy by Lawrence Livermore National Laboratory under contract number DE-AC52-07NA27344. The research and materials incorporated in this work were partially developed at the National Laser Users{\textquoteright} Facility at the University of Rochester{\textquoteright}s Laboratory for Laser Energetics, with financial support from the U.S Department of Energy under Cooperative Agreement DE-NA0001944 and DE-NA0003611. Additional support was provided by the National Science Foundation EAR-1644614 and the Princeton Center for Complex Materials (PCCM), and a National Science Foundation (NSF)-MRSZECZ program (DRM-2011750). Publisher Copyright: {\textcopyright} 2022, The Author(s).",
year = "2022",
month = dec,
doi = "10.1038/s41467-022-29762-y",
language = "English (US)",
volume = "13",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",
}