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Title: Structure of International Simple Glass and properties of passivating layer formed in circumneutral pH conditions

Journal Article · · npj Materials Degradation

Knowing the structure of a material is necessary to understand its evolution under various influences; here, the alteration by water of a reference glass of nuclear interest, called International Simple Glass (ISG), is studied. The ISG atomic structure has not yet been thoroughly characterized. Short- and medium-range order in this six-oxide glass was investigated by molecular dynamics (MD) methods. Combining the simulated data with experimental observations acquired from both pristine and altered ISG provided new insight into the formation of surface layers and passivation of the underlying glass. In the tested conditions of 90 °C, silica-saturated solution, and pH90°C 7, the passivating layer partly inherits the structure of the pristine glass network despite the release of mobile elements (Na, B, and some Ca), with a reorganization of the silicate network following B release. The layer appears to minimize its internal energy by relaxing strain accumulated during glass quenching. The resulting passivated glass shows a strong resistance to hydrolysis. The nanopores of this hydrated material, displaying a mean pore size of ~1 nm, are filled with various water species. Water speciation determination inside the nanopores is therefore an achievement for future water dynamic study in the passivated glass.

Research Organization:
The Ohio State Univ., Columbus, OH (United States). Energy Frontier Research Center (EFRC) Center for Performance and Design of Nuclear Waste Forms and Containers (WastePD); French Alternative Energies and Atomic Energy Commission (CEA), Bagnols-sur-Ceze (France); Univ. of North Texas, Denton, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0016584
OSTI ID:
1470161
Alternate ID(s):
OSTI ID: 1667384
Journal Information:
npj Materials Degradation, Vol. 2, Issue 1; ISSN 2397-2106
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 66 works
Citation information provided by
Web of Science

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Cited By (24)

Nanoscale imaging of hydrogen and sodium in alteration layers of corroded glass using ToF-SIMS: Is an auxiliary sputtering ion beam necessary? journal October 2018
Dynamics of self-reorganization explains passivation of silicate glasses journal June 2018
Chemical durability of peraluminous glasses for nuclear waste conditioning journal March 2018
Impact of alkali on the passivation of silicate glass journal May 2018
A comparative review of the aqueous corrosion of glasses, crystalline ceramics, and metals journal May 2018
Nanoporous silica gel structures and evolution from reactive force field-based molecular dynamics simulations journal July 2018
Spectroscopic ellipsometry study of thickness and porosity of the alteration layer formed on international simple glass surface in aqueous corrosion conditions journal July 2018
Structural role of ZrO2 and its impact on properties of boroaluminosilicate nuclear waste glasses journal June 2018
Application of GRAAL model to the resumption of International Simple Glass alteration journal July 2018
Effect of thermally induced structural disorder on the chemical durability of International Simple Glass journal September 2018
Modeling glass corrosion with GRAAL journal November 2018
Simplifying a solution to a complex puzzle journal November 2018
Physical and optical properties of the International Simple Glass journal April 2019
Atomistic origin of the passivation effect in hydrated silicate glasses journal February 2019
ToF-SIMS depth profiling of altered glass journal April 2019
Predicting the dissolution kinetics of silicate glasses by topology-informed machine learning journal August 2019
Hydrogen bonding interactions of H2O and SiOH on a boroaluminosilicate glass corroded in aqueous solution journal January 2020
Real-time in situ observations of reaction and transport phenomena during silicate glass corrosion by fluid-cell Raman spectroscopy journal February 2019
Molecular Dynamics Simulation of Water Confinement in Disordered Aluminosilicate Subnanopores journal February 2018
Boron mining and enrichment waste: A promising raw material for porcelain tile production journal October 2019
Effects of surface initial condition on aqueous corrosion of glass-A study with a model nuclear waste glass journal September 2018
Development of boron oxide potentials for computer simulations of multicomponent oxide glasses journal October 2018
Dissolution of silica component of glass network at early stage of corrosion in initially silica‐saturated solution journal May 2019
Structural features of sodium silicate glasses from reactive force field‐based molecular dynamics simulations journal October 2019

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