%0 Conference Paper
%F Oral 
%T Rare gases adsorption in silica glass at high pressure
%+ Laboratoire Charles Coulomb (L2C)
%+ Institut de minéralogie et de physique des milieux condensés (IMPMC)
%+ Multiscale Material Science for Energy and Environment (MSE 2)
%A Foret, Marie
%A Weigel, Coralie
%A Ruffle, Benoit
%A Polian, Alain
%A Coasne, Benoit
%A Vacher, Rene
%F Invité
%< sans comité de lecture
%Z L2C:16-408
%B Workshop on gases and bubbles in molten glasses: from chemical engineering to geosciences
%C Paris, France
%8 2016-05-13
%D 2016
%Z Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]Conference papers
%X We investigate vitreous silica pressurized under the noble gases, He, Ne and Ar by both spectroscopic techniques and numerical simulations. We find an unexpectedhuge solubility of He and Ne at high pressure together with a large decrease of the static compressibility. We show that this relates to the open and flexible structure of the glass allowing gas atoms to distend the network, the same way a porous material deform upon fluid adsorption. This behavior can be rationalized using generalized poromechanical constitutive equations. Direct optical microscopy observations highlight the swelling of the silica network upon fluid adsorption. Very sharp diffusion front of the fluid into the silica the sample is further observed indicating non trivial kinetics of the diffusing atoms. In the Ne case, adsorption-desorption kinetics canbe tracked by Brillouin spectroscopy.
%G English
%L hal-01940780
%U https://hal.science/hal-01940780
%~ UNIV-PARIS7
%~ UPMC
%~ CNRS
%~ IMPMC
%~ ALLINSP
%~ L2C
%~ USPC
%~ UPMC_POLE_2
%~ MIPS
%~ UNIV-MONTPELLIER
%~ SORBONNE-UNIVERSITE
%~ SU-SCIENCES
%~ UNIV-PARIS
%~ ALLIANCE-SU
%~ UM-2015-2021