Elastic and plastic transformations of vitreous silica underpressure Auteur(s): Foret M., Ruffle B., Weigel C., Vacher R.
Conférence invité: Journées de la Matière Condensée, 2018 (Grenoble, FR, 2018-08-27) Ref HAL: hal-01940534_v1 Exporter : BibTex | endNote Résumé: The talk focuses on the thermodynamical properties of vitreous silica submitted to high pressures in a diamond anvil cell as obtained directly from Brillouin Light Scattering experiments or indirectly from standard relations. The analysis reveals non-negligible differences between static and dynamic compressibilities which are mostly related to the existence of thermally activated relaxational processes. Estimate of the residual densifications after complete cycles of compression/decompression is discussed. |