热喷涂制备Al-Al_(2)O_(3)涂层阻氚性能分析

Tritium permeation resistance of Al-Al_(2)O_(3) coatings prepared by thermal spraying

目的 为了使对阻氚性能要求不高的领域涂层的制备方法更为简便,本文提出了采用热喷涂技术制备Al-Al_(2)O_(3)阻氚涂层的方法并进行性能分析;方法 采用试验的方式验证了热喷涂方法制备的Al-Al_(2)O_(3)涂层的阻氚性能及结合力;结果 在不锈钢表面喷涂Al-Al_(2)O_(3)涂层0.2 mm后,氚渗透率可下降1个数量级,增加涂层厚度对阻氚性能无明显提升;采用划痕实验测定涂层的结合力在5~10N范围;结论 本文提出了一种较为简便的阻氚涂层制备方法,分析了热喷涂技术制备Al-Al_(2)O_(3)阻氚的性能,为含氚固体废物储存等领域阻氚涂层的选择提供了参考。

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-Al_(2)O_(3) tritium permeation barriers by thermal spraying technology and conducts a performance analysis.Methods The tritium permeation resistance and adhesion of Al-Al_(2)O_(3) 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-Al_(2)O_(3) 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-Al_(2)O_(3) 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.