Phase transition and hydrogen storage properties of melt-spun Mg3LaNi0.1 alloy
Phase transition and hydrogen storage properties of melt-spun Mg3LaNi0.1 alloy
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熔纺Mg3LaNi0.1合金的相变及储氢性能
DOI：
10.1016/j.ijhydene.2011.02.071
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发表时间：
2012
影响因子：
7.2
通讯作者：
Zhu, M.
中科院分区：
文献类型：
--
作者：
Lin, H.J.;Ouyang, L.Z.;Wang, H.;Liu, J.W.;Zhu, M.
采用单辊快淬法制备了名义Mg3 LaNi 0. 1合金。采用X射线衍射（XRD）、透射电镜（TEM）、差示扫描量热法（DSC）和压力-组成等温线（PCI）等测试手段研究了所制备薄带的相结构和储氢性能。快淬Mg3 LaNi 0. 1合金由Mg3 La相组成，室温时效后析出细小的LaMg 2Ni晶粒。Mg_3La和LaMg_2Ni在加氢时均发生歧化反应，分解为MgH_2、LaH_3和Mg_2NiH_4。与感应熔炼的合金相比，快淬合金表现出良好的吸氢动力学性能和较低的放氢温度，最大储氢量为3.1wt并且达到了224 °C的最低氢解吸温度。这种储氢性能的改善归因于原位形成的纳米晶Mg 2Ni和LaH 2的催化作用。
Nominal Mg3LaNi0.1alloy was prepared by a single roller melt-spun method. The phase structure and hydrogen storage properties of the obtained ribbons were studied by X-Ray diffraction (XRD), transmission electron microscopy (TEM), differential scanning calorimetry (DSC) analysis and pressure-composition isotherm (PCI) measurements. The melt-spun Mg3LaNi0.1alloy was composed of Mg3La phase, while fine LaMg2Ni grains were precipitated after an aging treatment at room temperature. Both Mg3La and LaMg2Ni undertook disproportion reactions upon hydrogenation and decomposed into MgH2, LaH3and Mg2NiH4. The melt-spun alloy shows excellent hydrogen absorption kinetics and lowered desorption temperature comparing with the induction-melted alloy, and a maximum hydrogen storage capacity of 3.1 wt.% and a minimum hydrogen desorption temperature of 224 °C were achieved. This improvement on the hydrogen storage properties was attributed to the catalytic role of in-situ formed nanocrystalline Mg2Ni and LaH2.
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影响因子：
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