摘要
本文使用数值模拟方法讨论了铀表面腐蚀初始阶段的氧化物形成过程。这个阶段发生在从清洁的铀表面吸附反应气体后到整个表面被一层氧化物所覆盖的过程之间。对储存在含有腐蚀气体气氛中的铀和铀合金材料,准确了解铀最初开始反应到表面被氧化物完全覆盖的反应速率是非常重要的。本文对该氧化物形成的过程进行了数学推导,讨论了等温情况下的近似分析数学表达式,得到了动力学方程,并与实验结果进行比较,表明理论模型是合理的。
Island-like oxidation of uranium surface corrosion was studied with theoretical modeling. The reaction rate of uranium and alloys from its initial stage to the surface fully covered by oxide was simulated. Mathematic formulation of the problem was pre- sented, and approximate analytical formulas were derived and discussed for the isothermal case. The kinetic formula under isothermal condition was achieved, and it is consi- dered reasonable that the numerically results of modeling are in accordance with that of experiments.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2005年第B07期146-150,共5页
Atomic Energy Science and Technology
关键词
铀
腐蚀
氧化物
动力学
活化能
uranium
corrosion
oxide
kinetics
activation energy
