1994 · 11 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials ThermodynamicsNuclear MaterialsNuclear Waste ManagementCrystallization ProcessesPhase DiagramsPhase EquilibriaPhase IdentificationPhase TransitionsThermodynamics Of Phase EquilibriaCrystallization KineticsCrystallization ModelingGlass Formation ModelingMineral Phase EquilibriaPhase Diagram PredictionThermodynamic ConstraintsThermodynamic FactorsThermodynamic Forces
The liquidus temperature (T{sub L}) was measured for simulated glasses from Hanford high-level nuclear waste composition range. The data were compared with three different prediction methods: (1) multicomponent crystallinity constraints (used to identify compositions with T{sub L} > 1050{degrees}C); (2) thermodynamic T{sub L} models based on phase equilibria; and (3) the Savannah River Site (SRS) model based on the free energy of formation of the crystalline phases. First-order T{sub L} models were developed for crystalline phases that precipitated in a sufficient number of glasses.