NSUF 20-4168: Ion Beam Irradiation and In-situ TEM characterization of High Entropy Titanate Pyrochlores

High entropy pyrochlores are a new type of ceramics and their use as a potential nuclear waste form are currently been investigated. While other high entropy pyrochlores have shown to have superior mechanical and thermal properties nothing is known about their ability to resist corrosion and radiation induced damage. For this proposal, we will combine ion beam irradiation and detailed transmission electron microscopy to analyze the structural changes of the high entropy pyrochlore when exposed to various dosages at set temperatures. With this we aim to find a correlation irradiation damage and the amount of disorder/entropy introduced into the pyrochlore system due the variation in cation sizes and mass, and the severe lattice deformation these variation cause. The experiment will be conducted on the samples produced at the Nuclear Material Laboratory at the Rensselaer Polytechnic Institute through the support of different program (DOE EFRC WastePD). The results obtained for this experiment will further the understanding of irradiation damage to ceramic waste forms and the role that entropy stabilization plays in reducing that damage.

Additional Info

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Abstract	High entropy pyrochlores are a new type of ceramics and their use as a potential nuclear waste form are currently been investigated. While other high entropy pyrochlores have shown to have superior mechanical and thermal properties nothing is known about their ability to resist corrosion and radiation induced damage. For this proposal, we will combine ion beam irradiation and detailed transmission electron microscopy to analyze the structural changes of the high entropy pyrochlore when exposed to various dosages at set temperatures. With this we aim to find a correlation irradiation damage and the amount of disorder/entropy introduced into the pyrochlore system due the variation in cation sizes and mass, and the severe lattice deformation these variation cause. The experiment will be conducted on the samples produced at the Nuclear Material Laboratory at the Rensselaer Polytechnic Institute through the support of different program (DOE EFRC WastePD). The results obtained for this experiment will further the understanding of irradiation damage to ceramic waste forms and the role that entropy stabilization plays in reducing that damage.
Award Announced Date	2020-07-14T14:12:16.06
Awarded Institution	Idaho National Laboratory
Facility	Advanced Test Reactor
Facility Tech Lead	Alina Zackrone, Wei-Ying Chen
Irradiation Facility	Intermediate Voltage Electron Microscopy (IVEM)-Tandem Facility
PI	Jie Lian
PI Email	[email protected]
Project Type	RTE
RTE Number	4168