Thermal Desorption of Hydrogen at the Titanium Hydride-Oxide Interface
Thermal Desorption of Hydrogen at the Titanium Hydride-Oxide Interface
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DOI：
10.2320/matertrans.46.196
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发表时间：
2005-02
影响因子：
1.2
通讯作者：
B. Tsuchiya;S. Nagata;N. Ohtsu;K. Toh;T. Shikama
中科院分区：
文献类型：
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作者：
B. Tsuchiya;S. Nagata;N. Ohtsu;K. Toh;T. Shikama
在等时和等温退火实验后，通过弹性反冲检测分析 (ERDA) 研究了覆盖有氧化钛层（TiO 和 TiO2）的 � 相氢化钛 (TiH1:92� 1:95) 中氢分布的变化。在 423 至 523 K 的温度范围内，氢化物表面附近的氢浓度随着退火时间呈指数下降。结果表明，氢化物中氢的热解吸受一级反应动力学控制，并且很大程度上取决于热脱捕过程。估算了氢化物-氧化物界面处氢的热解捕速率，并将其活化能确定为 1:3 × 0:2 eV。
Changes in hydrogen distribution in � -phase titanium hydrides (TiH1:92� 1:95), covered with titanium oxide layers (TiO and TiO2), were investigated by elastic recoil detection analysis (ERDA) after isochronal and isothermal annealing experiments. The hydrogen concentration near to the surface of the hydride exponentially decreased as a function of annealing time in the temperature range from 423 to 523 K. The result shows that the thermal desorption of hydrogen from the hydride is governed by first-order reaction kinetics and greatly depends on the thermal detrapping process. The thermal detrapping rates of hydrogen at the hydride-oxide interface were estimated and their activation energy was determined to be 1:3 � 0:2 eV.