论文标题
薄PD和COPD膜中晶格响应对氢吸收的动力学
Kinetics of the lattice response to hydrogen absorption in thin Pd and CoPd films
论文作者
论文摘要
氢可以可逆地穿透多种金属，占据间质位点并引起大量晶格膨胀。这里讨论的问题是结构反应的动力学是否与吸收氢相匹配。我们表明，暴露于相对较丰富的氢气大气（4％H2）的薄PD和COPD膜会不可逆转地膨胀，证明了可控的形状记忆，并且该过程的持续时间比吸收的持续时间可能更长。膨胀位点的成核和侧域壁膨胀的AVRAMI类型模型很好地描述了塑料蠕变的异常平衡的动力学。
Hydrogen can penetrate reversibly a number of metals, occupy the interstitial sites and cause large expansion of the crystal lattice. The question discussed here is whether the kinetics of the structural response matches hydrogen absorption. We show that thin Pd and CoPd films exposed to a relatively rich hydrogen atmosphere (4% H2) inflate irreversibly, demonstrate the controllable shape memory, and duration of the process can be orders of magnitude longer than hydrogen absorption. The dynamics of the out-of-equilibrium plastic creep is well described by the Avrami - type model of the nucleation and lateral domain wall expansion of the swelled sites.
