High temperature interaction of hydrogen with intermetallic compound CaNi5
High temperature interaction of hydrogen with intermetallic compound CaNi5
复制标题
氢与金属间化合物CaNi5的高温相互作用
DOI：
10.1016/0254-0584(88)90064-8
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发表时间：
1988
影响因子：
4.6
通讯作者：
V. Srinivasan
中科院分区：
文献类型：
--
作者：
M. P. S. Kumar;B. Viswanathan;C. Swamy;V. Srinivasan
金属间化合物CaNi 5在350° C以上用氢处理时迅速地转化为CaH 2和Ni。该反应在初始阶段的动力学遵循成核和生长机制。在640°C ~ 725°C温度范围内测定了氢与CaNi_5相互作用的压力-组成-温度等温线，计算出CaNi_5的Δ Hf为12.9 kcal/mol。差热分析证实了CaNi 5-H2反应的方案。即使是5%的合金结晶度也会极大地影响室温下的氢吸附动力学。
The intermetallic compound CaNi5disproportionates rapidly into CaH2and Ni when treated with hydrogen above 350° C. The kinetics of this reaction in the initial stages follows the nucleation and growth mechanism. The pressure-composition-temperature isotherms for hydrogen interaction with CaNi5in the temperature range 640°C to 725°C have been determined and the ΔHffor CaNi5is calculated to be 12.9 kcal/mol. Differential thermal analysis confirms the scheme proposed for the CaNi5-H2reaction. Even a 5% disproportionation of the alloy drastically affects the kinetics of hydrogen Sorption at room temperature.