Electronic Resource
s.l. ; Stafa-Zurich, Switzerland
Solid state phenomena
Vol. 124-126 (June 2007), p. 535-538
ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
The production of high purity hydrogen gas is an important technical issue for future energyand environmental problem. The pure hydrogen is the ideal fuel in terms of fuel-cell performance.There have been many investigations on the hydrogen permeation of Pd-coated membrane ofamorphous alloys. The purpose of this research is to characterize the surface such as roughness andmorphology of surface layer of Ni-based amorphous alloy membrane by atomic force microscopy(AFM). The ribbon of Ni-Nb-Ta amorphous alloy was produced by a single-roller melt-spinningtechnique. The surface characteristic of the amorphous alloy membrane was discussed in view of thehydrogen permeation behavior. From the 3-dimensional AFM images, a lot of hole was observed onthe surface of the amorphous alloy membrane produced in air atmosphere. But, a lot of protrusionwere observed in the membrane produced in vacuum due to the selective growth on the highoxygen-affinity element of the amorphous alloy. The average roughness of the membrane produced inair atmosphere and vacuum was measured to be 0.359 and 0.263nm, respectively. Therefore, it wasconsidered that it would be suitable to produce the amorphous alloy membrane in vacuum
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.124-126.535.pdf
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