以醋酸铒四水合物（C₆H₉ErO₆·4H₂O）为前驱体，乙二醇甲醚为溶剂，二乙醇胺为络合剂，采用溶胶-凝胶法在中国抗中子辐照钢（CLAM）基体表面制备Er₂O₃阻氚涂层。随后采用旋涂法在Er₂O₃涂层制备一层氧化石墨烯（GO），得到GO/Er₂O₃复合涂层。利用SEM、EDS和拉曼光谱仪对涂层显微组织进行表征。结果表明，氧化石墨烯质量浓度对GO/Er₂O₃复合涂层微观结构影响较大，当氧化石墨烯质量浓度达到5 mg/mL时，氧化石墨烯能够完整地覆盖在Er₂O₃涂层表面，达到提高阻氚因子的作用。而不同烧结气氛对GO/Er₂O₃复合涂层微观结构影响不显著。

Erbium (Ⅲ) acetate tetrahydrate (C₆H₉ErO₆H₂O),2-methoxyethanol and diethanolamine are utilized as precursor,solvent and stabilizer,respectively to prepare Er₂O₃ tritium permeation barriers (TPB) coating on China Low Activation Steel (CLAM) via sol-gel method.Subsequently,a layer of graphene oxide (GO) film is prepared onto the crystallized erbium oxide coating by spin-coating method to acquire GO/Er₂O₃ composite coating.In this work,the microstructure of coating is analyzed by field emission scanning electron microscopy (FE-SEM),energy dispersive X-ray spectroscopy (EDS) and Raman spectroscopy.The results show that the concentration of graphene oxide has a significant impact on the microstructure of GO/Er₂O₃ composite coating.When the concentration of graphene oxide reaches 5 mg·mL^-1,the surface of the Er₂O₃ coatings can be completely covered by graphene oxide,which will enhance the performance against tritium permeation.Different sintering atmosphere has no significant influence on the microstructure of GO/Er₂O₃ composite coating.

张倩(1993-),女,硕士研究生,主要从事金属氧化物阻氚涂层研究,qian.zhang@fds.org.cn