Er_2O_3阻氚涂层的化学溶液法制备研究

Preparation of Er_2O_3 tritium permeation barrier coatings through chemical solution deposition

由于具有高的绝缘性和热力学稳定性,近年来氧化铒(Er2O3)作为一种新型的阻氚渗透涂层材料受到极大的研究重视。本文采用化学溶液法在316L不锈钢基体上制备了Er2O3阻氚涂层,研究了前躯体液pH值、浓度和晶化处理气氛对涂层结构和性能的影响。结果表明,前躯体液在pH值为7.6-7.8、浓度为0.4 mol/L进行涂覆并在空气气氛中进行晶化处理,可获得表面连续、致密的Er2O3阻氚涂层,涂层与基体的结合力达到7.8 N,涂层绝缘电阻率为106Ω.m-109Ω.m,绝缘性能、抗热冲击性能良好。

Recently, Er203 tritium permeation barrier （TPB） coatings attracted much attention due to their good electrical insulation and thermodynamic stability. In the present work, Er：O3 TPB coatings were prepared on 316L stainless steel substrates through a chemical solution deposition method. Effects of the pH value and concentration of the precursor solution as well as the crystallization atmosphere on the coating structure and properties were studied. The results revealed that continuous and dense Er2O3 coatings can be deposited with a pH value between 7.6-7.8 and a precursor concentration of 0.4mol/L, followed by an air annealing for crystallization. The bonding strength between the coatings and substrates reached 7.8N. The electrical resistivity of the coatings measured between 10^-6Ω·m～10^-9Ω·m. The coatings also had a high thermal shock resistance.