Ti-Mo合金吸氢动力学的同位素效应  

Kinetics of Hydrogen Isotope Absorption by Ti-Mo Alloy

作　　者：王伟伟[1] 龙兴贵[1] 郝万立[1] 黄刚[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《原子能科学技术》2008年第10期902-905,共4页Atomic Energy Science and Technology

摘　　要：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TiMo_x(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。高沮(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。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.

关 键 词：Ti-Mo固溶体合金 吸氘动力学 同位素效应 

分 类 号：O614.411[理学—无机化学]