Improved Response Time of a Thin Film Hydrogen Storage Alloy Unimorph Structure after Platinum Surface Treatment
Improved Response Time of a Thin Film Hydrogen Storage Alloy Unimorph Structure after Platinum Surface Treatment
复制标题
铂表面处理后薄膜储氢合金单晶结构的响应时间得到改善
DOI：
10.2320/matertrans.45.2902
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发表时间：
2004
影响因子：
1.2
通讯作者：
Takamitsu Honjo
中科院分区：
文献类型：
--
作者：
Y. Nishi;H. Uchida;Takamitsu Honjo
在这项研究中，研究了铂表面处理对沉积在聚酰亚胺衬底上的LaNi5薄膜致动器力学响应的影响。由于该致动器可以由氢气压力控制可逆驱动，因此它可以作为各种氢气相关装置中氢气通量的传感器和/或控制器。在实验中，通过铂表面处理将氢气暴露后的驱动潜伏期从100 s缩短到10 s。这种显著改变的机械响应归因于反应速率决定步骤的切换。铂处理提高了表面氢气分子的分解速率。铂处理应引起速率决定步骤的变化，使氢原子渗透/扩散到膜中。
In this study, the effect of a platinum surface treatment on the mechanical response of a LaNi5 thin film actuator deposited on polyimide substrates was investigated. Since this actuator could be reversibly driven by hydrogen pressure control, it could function as a sensor and/or controller of the hydrogen gas flux in various hydrogen related devices. In the experiments, the incubation period of the actuation after hydrogen gas exposure was reduced from 100 to 10 s by the platinum surface treatment. This significantly modified mechanical response is attributed to a switching of the reaction rate determining steps. The platinum treatment enhanced the decomposition rate of hydrogen gas molecules at the surface. The platinum treatment should bring about a change of rate determining step to a permeation/diffusion of the hydrogen atoms into the film.