Combinatorial study of hydrogen storage alloys

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2009

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Ölmez, Rabia

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A combinatorial study was carried out for hydrogen storage alloys which involve processes similar to those normally used in their fabrication. The study utilized a single sample of combined elemental (or compound) powders which were milled and consolidated into a bulk form and subsequently deformed to heavy strains. Material library was obtained in a post annealing treatment carried out at elevated temperatures which brings about solid state reactions between the powders yielding equilibrium phases in the respective alloy system. A sample comprising the material library was then pulverized and screened for hydrogen storage composition. X-ray diffraction was used as a screening tool, the sample having been examined both in as-processed and hydrogenated state. The method was successfully applied to Mg-Ni, and Mg-Ni-Ti yielding the well known Mg2Ni as the storage composition. It is concluded that partitioning of the alloy system into regions of similar solidus temperature would be required to enrich the material library.

Subject Keywords

Metallurgical and materials engineering.

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http://etd.lib.metu.edu.tr/upload/2/12610552/index.pdf
https://hdl.handle.net/11511/18814

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

R. Ölmez, “Combinatorial study of hydrogen storage alloys,” M.S. - Master of Science, Middle East Technical University, 2009.