Correlation study between hydrogen absorption property and lattice structure of Mg-based BCC alloys
Correlation study between hydrogen absorption property and lattice structure of Mg-based BCC alloys
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DOI：
10.1016/j.ijhydene.2008.12.091
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发表时间：
2009-03
影响因子：
7.2
通讯作者：
H. Shao;K. Asano;H. Enoki;E. Akiba
中科院分区：
文献类型：
--
作者：
H. Shao;K. Asano;H. Enoki;E. Akiba
采用机械合金化方法制备了纳米结构Mg 60 Ni 5 ComX 35 −m（X=Co，B，Al，Cr，V，Pd和Cu）体心立方（BCC）合金。这些具有不同晶格参数的镁基合金可以显示出显著不同的吸氢性能。在373 K时，晶格常数在0.300 ~ 0.308nm范围内的BCC合金吸氢量较大，而晶格常数大于0.313nm的BCC合金在该温度下吸氢量较小。几何效应被认为是影响间隙合金吸氢性能的主要因素之一。机械合金化过程中产生的纳米结构、新鲜表面积和缺陷也是镁基合金在373 K吸氢的重要因素。
Nanostructured Mg60Ni5ComX35−m(X=Co, B, Al, Cr, V, Pd and Cu) body centered cubic (BCC) alloys were synthesized by mechanical alloying method. These Mg-based alloys with different lattice parameters can show significantly different hydrogen absorption properties. The BCC alloys with lattice parameter in the range of 0.300∼0.308nm absorb large amount of hydrogen at 373K and the BCC alloys with the parameter larger than 0.313nm have difficulty to absorb hydrogen at this temperature. Geometric effect is thought to be one of the dominant factors to affect the hydrogen absorption property of interstitial alloys. Nanostructure, fresh surface area and defects produced during mechanical alloying process are also important facts that make Mg-based alloys absorb hydrogen at 373K.