| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments
|
| Presentation Title |
Study on Hydrogen Isotopes Solubility and Diffusivity in Y- and Co-doped Barium-zirconates Using Tritium Imaging Plate Technique |
| Author(s) |
M. Khalid Hossain, Y. Hatano, K. Hashizume |
| On-Site Speaker (Planned) |
M. Khalid Hossain |
| Abstract Scope |
Proton conducting oxides have a potential application in the tritium purification and recovery system of nuclear fusion reactors. Hydrogen distribution in such oxide materials is very fundamental and important, but its precise measurement is not so easy. In the present study, hydrogen solubility and diffusivity behavior in Y and Co doped barium-zirconates were studied using partially-tritiated deuterium vapor DTO (T 0.1%, ~2kPa) under two exposure conditions (673K, 2h or 873K, 1h) by tritium imaging plate (IP) technique. More than 98% dense specimens were prepared with conventional powder metallurgy using BaZr0.9Y0.1O2.95 (BZY) and BaZr0.955Y0.03Co0.015O2.97 (BZYC) powder. Cross-sectional T concentration profile of cut specimens showed that more T was diffused into BZY near-surface compared to BZYC. BZY shows both higher solubility and diffusivity than the BZYC, suggests that only a small amount of Y doping (10%) may play a vital role of enhancement of electrochemical activity in DTO exposed proton conducting BaZrO3. |