Solubility of Tritium in Cu-Be Alloy
Solubility of Tritium in Cu-Be Alloy
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DOI：
10.13182/fst11-a12714
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发表时间：
2011-11
影响因子：
0.9
通讯作者：
M. Matsuyama;K. Shinmura;Z. Chen;Y. Torikai
中科院分区：
文献类型：
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作者：
M. Matsuyama;K. Shinmura;Z. Chen;Y. Torikai
摘要 通过测量合金中氚深度分布来测定Cu-Be(2质量%)合金中氚的溶解度。样品的氚暴露在以下条件下进行：压力，0.4至2.6kPa；温度，350至450°C；暴露时间，4至11小时。曝光后通过化学蚀刻获得氚深度剖面。在 0.5 μm 范围内的表层中出现了非常高的氚浓度，而从 10 μm 到本体则观察到几乎恒定的浓度。因此，发现在评估氚溶解度时应忽略表面氚。此外，从压力依赖性来看，氚在Cu-Be合金中的溶解遵循Sieverts定律，并且氚在Cu-Be合金中的溶解度低于纯铜中的溶解度。根据溶解度的温度依赖性，确定氚的溶解热为17 kJ/mol。
Abstract Solubility of tritium in Cu-Be(2 mass%) alloy was determined by means of measurement of a tritium depth profile in the alloy. Tritium exposure to the samples was conducted under the following conditions: pressure, 0.4 to 2.6 kPa; temperature, 350 to 450°C; exposure time, 4 to 11 hours. Tritium depth profiles were obtained by chemical etching after the exposure. Remarkably high tritium concentration appeared in surface layers within 0.5 μm, whereas almost constant concentration was observed from 10 μm to the bulk. It was found, therefore, that surface tritium should be omitted in evaluation of the solubility of tritium. In addition, it was seen that dissolution of tritium into Cu-Be alloy obeys the Sieverts’ law from the pressure dependence, and the solubility of tritium in Cu-Be alloy was lower than that in pure copper. From the temperature dependence of solubility, the heat of solution of tritium was determined as 17 kJ/mol.