Kinetics of hydrogen absorption by α‐zirconium
Kinetics of hydrogen absorption by α‐zirconium
复制标题
α-锆吸氢动力学
DOI：
10.1063/1.446142
复制
发表时间：
1983
影响因子：
4.4
通讯作者：
S. Naito
中科院分区：
文献类型：
--
作者：
S. Naito
在压力为2×10~(-5)~1×10~(-1)Pa和温度为673~1073K的范围内，用球形样品研究了α-锆多晶金属的吸氢动力学，并根据模型对实验结果进行了合理的解释。该模型假定吸氢过程由三个连续步骤组成：解离吸附，吸附氢原子之间的横向相互作用，吸附的氢原子跳跃到间隙位置，最后扩散到金属体内。在本研究的压力和温度范围内，第一步和第三步都是在低压或低温条件下进行速率控制。在低温下，随着压力的增加，侧向相互作用对吸收速率的影响很大。确定了表征该速率方程的一些参数：解离吸附活化能为(1.7±0.5)×10−2 1J/H原子，解离吸附活化能为(1.7±0.5)×1 0J/H原子.
The kinetics of hydrogen absorption by polycrystalline α‐zirconium metals has been investigated by the use of spherical specimens in the pressure range 2×10−5–1×101 Pa and in the temperature range 673–1073 K. The experimental results are reasonably explained on the basis of the model in which the process is assumed to be composed of three successive steps: dissociative adsorption with lateral interaction between adsorbed hydrogen atoms; jump of the adsorbed hydrogen atom into the interstitial site; and finally its diffusion into the metal bulk. Both the first and third steps are rate controlling under the conditions of low pressures or low temperatures within the pressure and temperature ranges of this investigation. At low temperatures the absorption rate is significantly affected by the lateral interaction as the pressure is increased. Some parameters which characterize the derived rate equations have been determined: the activation energies are (1.7±0.5)×10−21 J/H atom for dissociative adsorption and (...