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Ouvrages Année : 2017

Poroelastic Theory Applied to the Adsorption-Induced Deformation of Amorphous Silica

Coralie Weigel
  • Fonction : Directeur scientifique
  • PersonId : 1009988
Alain Polian
Mathieu Kint
  • Fonction : Directeur scientifique
Marie Foret
  • Fonction : Directeur scientifique
  • PersonId : 1009989
Rene Vacher
  • Fonction : Directeur scientifique
  • PersonId : 1009990
Benoit Ruffle
  • Fonction : Directeur scientifique
  • PersonId : 1009987
Benoit Coasne

Résumé

Under a high pressure of helium, the volume change of amorphous silica is much smaller than expected from its elastic properties. This is due to helium insertion in the free volume of the glass network. Here, we report spectroscopic experiments using either helium or neon as penetrating pressurizing media and molecular simulation that indicate a relationship between the amount of gas adsorbed and the strain of the network. A generalized poromechanical approach, describing the elastic properties of microporous materials upon adsorption, is shown to successfully describe the physics of deformation of such silica glasses in which the free volume exists only at the sub-nanometer scale.
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Dates et versions

hal-01909090 , version 1 (30-10-2018)

Identifiants

Citer

Coralie Weigel, Alain Polian, Mathieu Kint, Jérome Rouquette, Julien Haines, et al. (Dir.). Poroelastic Theory Applied to the Adsorption-Induced Deformation of Amorphous Silica. pp.14-19, 2017, POROMECHANICS VI: PROCEEDINGS OF THE SIXTH BIOT CONFERENCE ON POROMECHANICS, ⟨10.1061/9780784480779.003⟩. ⟨hal-01909090⟩
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