Microstructure of MmM5/Mg multi-layer hydrogen storage films prepared by magnetron sputtering

Ouyang, L. Z. and Wang, Hao and Zhu, M. and Zou, Jin and Chung, C. Y. (2004) Microstructure of MmM5/Mg multi-layer hydrogen storage films prepared by magnetron sputtering. Microscopy Research and Technique, 64 (4). pp. 323-329. ISSN 1059-910X

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Abstract

Multi-layer hydrogen storage thin films with Mg and MmNi3.5(CoAlMn)1.5 (here Mm denotes La-rich mischmetal) as alternative layers were prepared by direct current magnetron sputtering. Transmission electron microscopy investigation shows that the microstructure of the MmNi3.5(CoAlMn)1.5 and Mg layers are significantly different although their deposition conditions are the same. The MmNi3.5(CoAlMn)1.5 layer is composed of two regions: one is an amorphous region approximately 4 nm thick at the bottom of the layer and the other is a nanocrystalline region on top of the amorphous region. The Mg layer is also composed of two regions: one is a randomly orientated nanocrystalline region 50 nm thick at the bottom of the layer and the other is a columnar crystallite region on top of the nanocrystalline region. These Mg columnar crystallites have their [001] directions parallel to the growth direction and the average lateral size of these columnar crystallites is about 100 nm. A growth mechanism of the multi-layer thin films is discussed based on the experiment results


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Deposited in accordance with the copyright policy of the journal publisher (Wiley)
Depositing User: Ms Leslie Blay
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 12 May 2010 10:10
Last Modified: 02 Jul 2013 23:53
Uncontrolled Keywords: transmission electron microscopy; hydrogen storage alloys; thin films; magnetron sputtering
Fields of Research (FOR2008): 06 Biological Sciences > 0601 Biochemistry and Cell Biology > 060199 Biochemistry and Cell Biology not elsewhere classified
09 Engineering > 0910 Manufacturing Engineering > 091006 Manufacturing Processes and Technologies (excl. Textiles)
09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
10 Technology > 1007 Nanotechnology > 100708 Nanomaterials
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: doi: 10.1002/jemt.20089
URI: http://eprints.usq.edu.au/id/eprint/8035

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