TY - JOUR
T1 - Network structure in alteration layer of boroaluminosilicate glass formed by aqueous corrosion
AU - Kaya, Huseyin
AU - Ngo, Dien
AU - Smith, Nicholas J.
AU - Gin, Stéphane
AU - Kim, Seong H.
N1 - Funding Information:
This work was supported as part of the Center for Performance and Design of Nuclear Waste Forms and Containers, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award # DE-SC0016584. The authors thank Prof. Michael A. Hickner (The Pennsylvania State University) for allowing the access to the spectroscopic ellipsometry setup in his lab.
Funding Information:
This work was supported as part of the Center for Performance and Design of Nuclear Waste Forms and Containers, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award # DE-SC0016584 . The authors thank Prof. Michael A. Hickner (The Pennsylvania State University) for allowing the access to the spectroscopic ellipsometry setup in his lab.
Publisher Copyright:
© 2020
PY - 2021/2/1
Y1 - 2021/2/1
N2 - Exogenously-added LiCl has been shown to slightly accelerate the corrosion rate of a boroaluminosilicate glass called International Simple Glass (ISG) in aqueous solutions over forward- and residual-rate regimes, while KCl and CsCl impede. To understand the effect of exogenously added electrolytes on resulting hydrous species and the network structure of alteration layers, infrared spectroscopy was implemented. It was found that the fraction of molecular water relative to the surface-bound hydroxyl species is lower in the KCl and CsCl conditions compared to the LiCl and pure water conditions. An approximation for the spectral features of the thin surface films from an experimentally-obtained specular-reflectance infrared (SR-IR) spectrum was proposed; results indicate no significant difference in the Si-O bonding network of the alteration layers formed in the presence of exogenously added LiCl, KCl and CsCl. The observed change in corrosion rates might be linked to the relative abundance of molecular water species in the porous network, rather than the silicate bonding structure.
AB - Exogenously-added LiCl has been shown to slightly accelerate the corrosion rate of a boroaluminosilicate glass called International Simple Glass (ISG) in aqueous solutions over forward- and residual-rate regimes, while KCl and CsCl impede. To understand the effect of exogenously added electrolytes on resulting hydrous species and the network structure of alteration layers, infrared spectroscopy was implemented. It was found that the fraction of molecular water relative to the surface-bound hydroxyl species is lower in the KCl and CsCl conditions compared to the LiCl and pure water conditions. An approximation for the spectral features of the thin surface films from an experimentally-obtained specular-reflectance infrared (SR-IR) spectrum was proposed; results indicate no significant difference in the Si-O bonding network of the alteration layers formed in the presence of exogenously added LiCl, KCl and CsCl. The observed change in corrosion rates might be linked to the relative abundance of molecular water species in the porous network, rather than the silicate bonding structure.
UR - http://www.scopus.com/inward/record.url?scp=85093078367&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85093078367&partnerID=8YFLogxK
U2 - 10.1016/j.jnoncrysol.2020.120494
DO - 10.1016/j.jnoncrysol.2020.120494
M3 - Article
AN - SCOPUS:85093078367
VL - 553
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
M1 - 120494
ER -