Microstructure and hydrogen sorption properties of Mg–Ni/MmM5 multi-layer film by magnetron sputtering
Microstructure and hydrogen sorption properties of Mg–Ni/MmM5 multi-layer film by magnetron sputtering
复制标题
DOI：
10.1016/j.ijhydene.2004.01.006
复制
发表时间：
2004-10
影响因子：
7.2
通讯作者：
Hui Wang;L. Ouyang;M. Zeng;Min Zhu
中科院分区：
文献类型：
--
作者：
Hui Wang;L. Ouyang;M. Zeng;Min Zhu
为了提高Mg-Ni基合金的加氢性能，采用磁控溅射技术制备了Mg-Ni/MmM5多层薄膜。通过X射线衍射、扫描电子显微镜和压力-成分等温线测量对沉积薄膜的微观结构和氢化性能进行了表征。结果表明，Mg-Ni层由择优取向的纳米晶Mg2Ni和细晶Mg组成，而MmM5层为非晶结构。 Mg-Ni/MmM5多层薄膜在523 K时的PCI曲线由两个平台组成，分别对应于Mg和Mg2Ni的氢化和脱氢反应；在523K时获得5.0质量%的最大吸氢含量。 Mg-Ni/MmM5多层薄膜的加氢性能比相应的Mg-Ni合金靶材有很大提高，这归因于Mg-Ni层的纳米晶结构和非晶MmM5层的催化作用。然而，Mg-Ni/MmM5多层膜的氢化性能在多次循环后会恶化。
To improve the hydrogenation properties of Mg–Ni-base alloys, Mg–Ni/MmM5multi-layer film was fabricated by magnetron sputtering. The microstructure and hydrogenation properties of as-deposited film were characterized by X-ray diffraction, scanning electron microscopy and pressure-composition isotherm measurement. It was shown that the Mg–Ni layer is composed of preferred orientational nanocrystalline Mg2Ni and fine-crystalline Mg, while the MmM5layer is in amorphous structure. PCI curve of Mg–Ni/MmM5multi-layer film at 523 K is composed of two plateaus, which correspond to the hydriding and dehydriding reactions of Mg and Mg2Ni, respectively; A maximum hydrogen absorption content of 5.0 mass % is obtained at 523 K . The hydrogenation properties of Mg–Ni/MmM5multi-layer film are greatly improved than that of the corresponding Mg–Ni alloy target, which is attributed to the nanocrystalline structure of the Mg–Ni layer and catalytic role of the amorphous MmM5layer. However, the hydrogenation properties of Mg–Ni/MmM5multi-layer film are deteriorated after several cycles.