ABSTRACT
@#<b>Objective</b> To make the preparation method for coatings more convenient in the field where the requirements for tritium permeation resistance are not high, this paper proposes a method for preparing Al-Al<sub>2</sub>O<sub>3</sub> tritium permeation barriers by thermal spraying technology and conducts a performance analysis. <b>Methods</b> The tritium permeation resistance and adhesion of Al-Al<sub>2</sub>O<sub>3</sub> coatings prepared by thermal spraying were verified by experiments. <b>Results</b> The tritium permeability was reduced by one order of magnitude after a 0.2-mm Al-Al<sub>2</sub>O<sub>3</sub> coating was sprayed on the stainless steel surface, and the tritium permeation resistance had no significant improvement with the increase in coating thickness; the adhesion of the coating was determined in the range of 5-10 N by scratch tests. <b>Conclusion</b> In this paper, a simple preparation method for tritium permeation barrier is proposed, and the tritium permeation resistance performance of Al-Al<sub>2</sub>O<sub>3</sub> coatings prepared by thermal spraying technology is determined, which provides a reference for the selection of tritium permeation barrier in the field of tritium-containing solid waste storage.