摘要
在陶瓷（玻璃或氧化物）材料中氢同位素分子扩散的１次方定律和在金属材料中原子扩散的１／２次方定律的基础上建立了双层介质扩散模型，推导出氢浓度分布函数、镀膜复合体的氢渗透速率以及渗透速率对驱动氢压的幂指数表达式。讨论了稳态氢渗透速率随膜厚、测量温度、驱动氢压变化的规律。根据实验测量的镀膜复合体的渗透速率、稳态渗透速率对驱动氢压依赖关系的幂指数大小，得到了膜材本身的渗透、扩散、溶解等热力学参数，同时估算了膜缺陷导致直接经基体渗透的氢流量大小，以作为评价镀膜质量的实验依据。
お onedimensional model for hydrogen isotope permeation through double layer media is established based on the wellknown firstpower law for hydrogen molecule in ceramics (glass/crystalline ionic compounds) and square root law for hydrogen atom in metals. The expressions of hydrogen concentration distribution, the rate of hydrogen permeation through a metalfilm composite and its pressure dependence in power index form are deduced. The steady hydrogen flow rate as a function of film thickness, temperature and upstream pressure is discussed. The purpose of this study is to determine the solubility, diffusivity and permeability for a film free of defects based on the measured rate of hydrogen permeation through the metalfilm composite and the power index of its pressure dependence. Meanwhile, the rate of direct hydrogen permeation through the substrate due to film defects can be estimated, which is proposed to evaluate the quality of film.
出处
《核聚变与等离子体物理》
CAS
CSCD
北大核心
1998年第3期9-17,共9页
Nuclear Fusion and Plasma Physics
