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| Tritium permeation resistance of Al-Al2O3 coatings prepared by thermal spraying |
| ZHAO Jianing, XU Yeqiang |
| China Institute of Atomic Energy, Beijing 102413 China |
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Abstract Objective 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-Al2O3 tritium permeation barriers by thermal spraying technology and conducts a performance analysis. Methods The tritium permeation resistance and adhesion of Al-Al2O3 coatings prepared by thermal spraying were verified by experiments. Results The tritium permeability was reduced by one order of magnitude after a 0.2-mm Al-Al2O3 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. Conclusion In this paper, a simple preparation method for tritium permeation barrier is proposed, and the tritium permeation resistance performance of Al-Al2O3 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.
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Received: 14 November 2022
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