论文部分内容阅读
用电化学方法研究了钕和镧对工业纯铁中氢的渗透过程和扩散系数的影响。随着铁中钕或镧含量的增加,氢的渗透过程减慢、扩散系数下降。固溶钕和镧原子是铁中氢的可逆浅陷阱。固溶钕原子与氢的结合能为4.4kcal/mol。当钕含量<0.082wt％时,氢的扩散过程激活能为6.1kcal/mol,含钕的铁中氢的渗透过程激活能为8.7kcal/mol。
The effect of neodymium and lanthanum on hydrogen permeation and diffusion coefficient in industrial pure iron was studied electrochemically. With the increase of the content of neodymium or lanthanum in iron, the permeation of hydrogen slows and the diffusion coefficient decreases. Solute neodymium and lanthanum atoms are reversible shallow traps for hydrogen in iron. The binding energy of solid solution neodymium atom to hydrogen is 4.4 kcal / mol. When the neodymium content is less than 0.082wt%, the activation energy of hydrogen diffusion process is 6.1kcal / mol, and the activation energy of hydrogen permeation process for neodymium-containing iron is 8.7kcal / mol.