Speaker
Description
Long Wang, Fantao Meng, Zhihao Hong, Baoping Gong, Fengchao Zhao, Qixiang Cao
Southwestern Institute of Physics, Chengdu 610225, P.R. China
Formation of a LiAlO2 layer is inevitable once solid-state reaction occurred between Al2O3 tritium permeation barrier and lithium ceramics. In this study, effect of LiAlO2 layer on the hydrogen isotope permeation behavior was first investigated. LiAlO2 coating were prepared on CLF-1 steel substrates by high-temperature lithium infiltration. The formation process and hydrogen isotope permeation behavior of LiAlO2 coatings were systematically analyzed through experimental and simulation approaches. The results demonstrate that LiAlO2 exhibits inward growth over time, forming a stable LiAlO2 -Al interface after 7 days. Deuterium permeation tests revealed that the LiAlO2 coating effectively resists deuterium permeation and diffusion. Notably, as the LiAlO2 coatings thickens, both the permeability and diffusion rates decrease progressively. Computational simulations further corroborated these findings, attributing the resistance to the low H₂ adsorption energy and high dissociation barrier of the LiAlO2 surface.
