低碳LaNi5储氢合金的杂质碳行为研究

Carbon behavior in mild LaNi5 alloy for hydrogen storage

LaNi5具有良好的储氢性能,有望成为氘氚燃料供给的重要候选材料。由于其性能易受杂质气体毒化,为了认识LaNi5本征碳杂质的影响,采用低碳LaNi5合金研究了循环吸放氢过程中的碳行为。结合色谱、XRD、ICP等手段,分析了气体成分和LaNi5的物相、组成及储氢性能。结果表明,碳在吸氢过程中逐渐转变为CH4,并积累在腔体中,未对LaNi5的性能造成直接影响。

LaNi5 is an important candidate material for deuterium/tritium fuel supplying, which shows good hydrogen storage performance. It is easy to poison by impurity gas so that the carbon behavior in mild LaNi5 alloy using repeated hydrogen absorption and desorption was studied in order to explore the effect of nature carbon impurity. Combined with chromatogram, XRD and ICP, the gas composition and the phase, composing and hydrogen storage properties of LaNi5 were analyzed. The results show that the carbon gradually transformed to CH4 during hydrogen absorbing process, and cumulateed in chamber, which did not directly affect the properties of LaNi5 alloy.