Direct imaging of shock wave splitting in diamond at Mbar pressure - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Matter and Radiation at Extremes Année : 2023

Direct imaging of shock wave splitting in diamond at Mbar pressure

Tatiana Pikuz
Kento Katagiri
Hirotaka Nakamura
Nicholas Hartley
Keiichi Sueda
Takuo Okuchi
Norimasa Ozaki

Résumé

Understanding the behavior of matter at extreme pressures of the order of a megabar (Mbar) is essential to gain insight into various physical phenomena at macroscales—the formation of planets, young stars, and the cores of super-Earths, and at microscales—damage to ceramic materials and high-pressure plastic transformation and phase transitions in solids. Under dynamic compression of solids up to Mbar pressures, even a solid with high strength exhibits plastic properties, causing the induced shock wave to split in two: an elastic precursor and a plastic shock wave. This phenomenon is described by theoretical models based on indirect measurements of material response. The advent of x-ray free-electron lasers (XFELs) has made it possible to use their ultrashort pulses for direct observations of the propagation of shock waves in solid materials by the method of phase-contrast radiography. However, there is still a lack of comprehensive data for verification of theoretical models of different solids. Here, we present the results of an experiment in which the evolution of the coupled elastic–plastic wave structure in diamond was directly observed and studied with submicrometer spatial resolution, using the unique capabilities of the x-ray free-electron laser (XFEL). The direct measurements allowed, for the first time, the fitting and validation of the 2D failure model for diamond in the range of several Mbar. Our experimental approach opens new possibilities for the direct verification and construction of equations of state of matter in the ultra-high-stress range, which are relevant to solving a variety of problems in high-energy-density physics.
Fichier principal
Vignette du fichier
Makarov_MRE.pdf (12.36 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04287348 , version 1 (15-11-2023)

Identifiants

Citer

Sergey Makarov, Sergey Dyachkov, Tatiana Pikuz, Kento Katagiri, Hirotaka Nakamura, et al.. Direct imaging of shock wave splitting in diamond at Mbar pressure. Matter and Radiation at Extremes, 2023, 8 (6), pp.066601. ⟨10.1063/5.0156681⟩. ⟨hal-04287348⟩
13 Consultations
2 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More