Kinetics of dehydrogenation in Ti600, TC21 and Ti40 alloys
Kinetics of dehydrogenation in Ti600, TC21 and Ti40 alloys
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DOI：
10.1016/j.jallcom.2009.10.074
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发表时间：
2010-02
影响因子：
6.2
通讯作者：
Xiao-li Wang;Yong-qing Zhao;M. Hagiwara;H. Hou;Tohru S. Suzuki
中科院分区：
文献类型：
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作者：
Xiao-li Wang;Yong-qing Zhao;M. Hagiwara;H. Hou;Tohru S. Suzuki
用管式热氢加热炉和差热-热重联用装置研究了Ti600、TC21和Ti40合金的脱氢动力学。结果表明，Ti600、TC21和Ti40合金的初始脱氢温度分别为580℃、600℃和540℃。在脱氢初期，合金表面的钝化层是提高扩散活化能的屏障。因此，活化能随反应分数的增加而减小。在初始阶段，三种合金的活化能分别为255kJ/mol、322kJ/mo1和177kJ/mo1。孵化后的脱氢活化能平均值分别为200±5kJ/mol、240±5kJ/mol和155±5kJ/mol。
The dehydrogenation kinetics of Ti600, TC21 and Ti40 alloys has been studied using a tubular thermohydrogen processing furnace and simultaneous DTA-TG apparatus. The results show that the initial dehydrogenation temperatures in Ti600, TC21 and Ti40 alloys were 580°C, 600°C and 540°C, respectively. At the initial stage of dehydrogenation, the passive layer on the alloy surface was the barrier to enhance the diffusion activation energy. Therefore, activation energy decreased with the increase of reacted fraction. At the initial stage, values of activation energy for the three alloys were 255kJ/mol, 322kJ/mol and 177kJ/mol, respectively. After incubation period, the dehydrogenation average values of activation energy were 200±5kJ/mol, 240±5kJ/mol and 155±5kJ/mol, respectively.