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Meeting Materials Science & Technology 2020
Symposium Additive Manufacturing of Ceramics and Ceramic Composites: Materials Properties, Processes, and Modeling
Presentation Title Fundamental Studies of Tritium Diffusivity in Irradiation Defective LiAlO2 and Li2ZrO3: A Frist Principles Density Function Theory Study
Author(s) Hari Paudel, Yuhua Duan
On-Site Speaker (Planned) Yuhua Duan
Abstract Scope Li containing ceramics have been in the center of study in Li ion batteries and tritium science and technology as breeding blanket materials for tritium (T) breeding components in the deuterium-tritium (D-T) fusion reactor. The thermal neutron irradiation of lithium isotope (6Li) in tritium (T) -producing burnable absorber rods (TPBARS) of LiAlO2 and Li2ZrO3 crystal produces vacancies, defects of its constituent elements, and several different trapping sites which hinder tritium diffusion process and releasing behavior. Here we investigate the diffusion mechanisms of tritium and OT species in pure and carbon doped LiAlO2 ceramic pellet in order to understand and quantify the effects on diffusion barriers and diffusion coefficients due to the presence of interstitial and substitutional Li defects, hydroxide (O-T) vacancy defect, and the interactions of T with O-vacancies. We also present diffusion of T in pure Li2ZrO3.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Additive Manufacturing of Hybrid Silicon Carbide/Carbon Fiber Nano-composites
Additive Manufacturing of Miniaturized RFID Tag Using Electroceramic Materials for High Temperature Wireless Sensing Applications
Additive Manufacturing of Novel PZT Piezocomposite Structures
Effect of Carbon Concentration from Phenolic PIP on the Fabrication and Thermal- Mechanical Properties of SiC Composites by Additive Manufacturing and Reactive Silicon Melt Infiltration
Fundamental Studies of Tritium Diffusivity in Irradiation Defective LiAlO2 and Li2ZrO3: A Frist Principles Density Function Theory Study
Mechanical Characterization of SLA Printed Silica Lattice Structures
Process Development for the Selective Laser Melting of Tungsten Carbide-Nickel Matrix Composites

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