Ti-Mo合金吸氢动力学的同位素效应

为寻找一种价格低廉、分离性能优良的氢同位素分离材料来替代金属Pd，对Ti-Mo合金的氢同位素效应进行研究。采用磁悬浮熔炼方法制备5种不同组成的TiMox（x=0.03、0.13、0.25、0.50、1.00，Mo/Ti原子比）固溶体合金，用定容变压法测试了250～650℃范围内的吸氘动力学性能。结合前期吸氕动力学的研究结果可知，在250～650℃范围内，合金的平衡吸氕量略大于合金的平衡吸氘量。Mo含量小于1.00，在低温（250～450℃）下，合金的吸氘表观活化能均为负值。高温（450～650℃）下，合金的吸氘表观活化能大于吸氕表观活化能，与钛吸氢同位素动力学效应保持一致。

Kinetics of Hydrogen Isotope Absorption by Ti-Mo Alloy

Deuterium absorption kinetics of the alloys TiMox（x=0.03, 0.13, 0.25, 0.50, 1.00, Mo/Ti atomic ratio） were studied at the temperature range of 250-650 ℃ by using the constant volume method. The activation energy of deuterium absorption decreases when the content of Mo rises from 0 to 0.25, and increases when the content rises over 0.25, at the temperature range of 450-650 ℃. The activation energy shows negative, when the temperature range is 250-450 ℃. Compared with protium absorption results investigated at previous period, the protium content in alloys is higher than the deuterium content at the temperature range of 250-650 ℃, showing negative thermodynamic isotope effect. At 450-650 ℃, it is harder for the alloys to absorb deuterium, while in lower temperature range, 250-450 ℃, the alloys show more active to absorb deuterium.