Comprehensive modeling of hydrogen transport and accumulation in titanium and zirconium
Comprehensive modeling of hydrogen transport and accumulation in titanium and zirconium
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钛和锆中氢传输和积累的综合模拟
DOI：
10.1016/j.nme.2020.100751
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发表时间：
2020
影响因子：
2.6
通讯作者：
Katsuaki Tanabe
中科院分区：
文献类型：
--
作者：
Yoshiki Hamamoto;Takeru Uchikoshi;Katsuaki Tanabe
建立了钛和锆的吸氢动力学模型。这些模型包括表面解离吸附和复合解吸、地下传输和整体扩散等氢传输过程的串联。利用该模型进行的数值计算定量地再现了不同温度下的一系列时间-瞬时吸收曲线的实验结果，证明了该模型的有效性。不同温度下的实验脱附曲线也由相同的模型方程和动力学参数重现，特别是对Zr，这表明了我们的单一模型对氢迁移方向的双重功能性。我们使用一个有效因子，定义为实际吸收率和虚速率之间的比率，忽略了体扩散。系统地分析了氢在钛和锆中传输的速率控制步骤在不同条件下的转变，如温度、压力、金属物体的大小和形状。为了验证该模型的适用性，对轻水反应堆燃料包壳中的氢积累进行了模拟，以确定在实际运行期间防止氢脆所需的包壳厚度。我们的多功能动力学模型可能是一个有用的工具，可以帮助核材料和设施的结构设计和优化。
We developed kinetic models of hydrogen absorption in Ti and Zr. The models comprise series connections of the hydrogen-transport processes of surface dissociative adsorption and recombinative desorption; subsurface transport; and bulk diffusion. Numerical calculations using the models quantitatively reproduce the results of experimental series of time-transient absorption curves at various temperatures, demonstrating the validity of our models. Experimental desorption curves at various temperatures are also reproduced by the same model equations and kinetic parameters, particularly for Zr, demonstrating the dual functionality of our single model for hydrogen-transport directions. We use an effectiveness factor defined as the ratio between the real absorption rate and the virtual rate neglecting bulk diffusion. The transitions of the rate-determining steps of hydrogen transport in Ti and Zr under various conditions – such as temperature, pressure, and metal object size and shape – are systematically analyzed. As a case study to test the applicability of our model, hydrogen accumulation in the fuel claddings of light-water nuclear reactors was simulated to determine the cladding thickness required to prevent hydrogen embrittlement during the practical operation period. Our versatile kinetic models could be a useful tool that can aid the structural design and optimization of nuclear materials and facilities.
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影响因子：
2.9
作者：
Ono Shunsuke;Uchikoshi Takeru;Hayashi Yusuke;Kitagawa Yuta;Yeh George;Yamaguchi Eiichi;Tanabe Katsuaki
通讯作者：
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影响因子：
3.1
作者：
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通讯作者：
D. Olander
DOI：
10.1007/bf02674016
发表时间：
1988-06-01
期刊：
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
影响因子：
--
作者：
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通讯作者：
BUXBAUM, RE
Ti-Zr-Cr-V合金的储氢特性
DOI：
10.1016/s0925-8388(99)00162-0
发表时间：
1999
期刊：
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影响因子：
--
作者：
Sung;C. Han;Choong;E. Akiba
通讯作者：
E. Akiba
影响因子：
4.4
作者：
S. Naito
通讯作者：
S. Naito