Kinetics of hydrogen absorption/desorption in TC21 alloy
Kinetics of hydrogen absorption/desorption in TC21 alloy
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DOI：
10.1016/j.jallcom.2009.10.081
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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;Yao-qi Wang;H. Hou;W. Zeng
中科院分区：
文献类型：
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作者：
Xiao-li Wang;Yong-qing Zhao;Yao-qi Wang;H. Hou;W. Zeng
在575-850°C温度范围内，研究了不同初始氢压下TC 21合金的吸放氢动力学。在较低的温度和初始氢压下，孕育期较长，氢压达到平衡所需的时间较长。随着温度和初始氢压的升高，孕育期缩短甚至消失。在第二吸氢阶段，吸氢过程服从三维扩散过程，机理函数为kt=[1-（1-α）1/3]2。在同一阶段，吸氢速率常数随温度的升高而增大。测得吸氢活化能为38.43kJ/mol。
The kinetics of hydrogen absorption/desorption in TC21 alloy have been investigated under different initial hydrogen pressure at the temperature range of 575–850°C. At lower temperature and initial hydrogen pressure, the incubation period was longer and the hydrogen pressure needed longer time to reach equilibrium. With the increase of temperature and initial hydrogen pressure, the incubation period decreased and even disappeared. At the second hydrogen absorption stage, the hydrogen absorption process obeyed 3-dimension diffusion process and the mechanism function was kt=[1−(1−α)1/3]2. The rate constant of hydrogen absorption increased with increasing temperature at the same stage. The activation energy of hydrogen absorption was found to be 38.43kJ/mol.