| About this Abstract |
| Meeting |
Materials Science & Technology 2019
|
| Symposium
|
Materials Issues in Nuclear Waste Management
|
| Presentation Title |
Thermodynamics of Zeolite Precipitation in Stage III Glass Corrosion |
| Author(s) |
Mathieu Bauchy |
| On-Site Speaker (Planned) |
Mathieu Bauchy |
| Abstract Scope |
Under specific conditions of pH and temperature, nuclear waste immobilization borosilicate glasses may exhibit a sudden acceleration in their corrosion kinetics (stage III)—a behavior that has been associated with the formation of zeolite crystals. However, it remains unclear whether the propensity for zeolite precipitation is controlled by its thermodynamics or kinetics. Here, we present a novel Gibbs energy minimization (GEM) framework allowing us to predict the stability fields of zeolitic phases as a function of pH and temperature. Consequences on the modeling of stage III dissolution in nuclear waste immobilization glasses are discussed. |