Abstract The effect of a thin alumina coating on stainless steel 316 (SS316) samples on tritium adsorption and transport are reported. Compact films of alumina were produced on the surfaces of pristine SS316 samples using an atomic layer deposition (ALD) technique. Subsequently, these samples were exposed for 24 h to a deuterium-tritium gas mixture (PT = 0.5 atm, 25°C). A combination of methods including selective etching and programmed thermal desorption were employed to assess both the depth profile of the tritium concentration in the sample and the total quantity of tritium absorbed, respectively. Tritium was quantitatively determined through the measurement of beta radioactivity using liquid-scintillation counting techniques. Data suggest that SS316 with a thin film of alumina reduces the total tritium uptake by ~25% relative to uncoated samples. Importantly, such films appear to reduce, by a factor of 200, tritium diffusion into SS316 and therefore constitute an effective barrier against tritium transport. This observation is of practical importance for tritium and, generally, reactive gas handling.

中文翻译：

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一种用作 316 不锈钢氚吸附抑制剂的氧化铝薄膜

摘要 报告了在不锈钢 316 (SS316) 样品上的薄氧化铝涂层对氚吸附和传输的影响。使用原子层沉积 (ALD) 技术在原始 SS316 样品的表面上产生致密的氧化铝膜。随后，将这些样品暴露于氘-氚气体混合物（PT = 0.5 atm，25°C）中 24 小时。包括选择性蚀刻和程序热解吸在内的方法的组合被用来分别评估样品中氚浓度的深度分布和吸收的氚总量。氚是通过使用液体闪烁计数技术测量 β 放射性来定量测定的。数据表明，与未涂覆的样品相比，具有氧化铝薄膜的 SS316 可将氚的总吸收量降低约 25%。重要的是，这种薄膜似乎可以将氚扩散到 SS316 中减少 200 倍，因此构成了阻止氚传输的有效屏障。这一观察结果对于氚和通常的反应性气体处理具有实际意义。