SOLUBILITY OF TRITIUM IN Cu-Be ALLOY

作者：Matsuyama, M.^*; Shinmura, K.; Chen, Z.; Torikai, Y.

来源：Fusion Science and Technology, 2011, 60(4): 1491-1494.

DOI：10.13182/FST11-A12714

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 degrees C; exposure time, 4 to 11 hours. Tritium depth profiles were obtained by chemical etching otter the exposure. Remarkably high tritium concentration appeared in surface layers within 0.5 mu m, whereas almost constant concentration was observed from 10 mu m 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.

• 出版日期2011-11
• 单位中国科学技术大学