日本金属学会誌

J. Japan Inst. Met. Mater, Vol. 84, No. 03 (2020),
pp. 99-108

Hydrogenation Properties in Ti-Mn-V Alloys

Kazuya Kubo1,2, Hideaki Itoh2, Etsuo Akiba3 and Akari Hayashi1,3,4

1Department of Hydrogen Energy Systems, Faculty of Engineering, Kyushu University, Fukuoka 819-0395
2The Japan Steel Works, Ltd., Tokyo 141-0032
3International Research Center for Hydrogen Energy, Kyushu University, Fukuoka 819-0395
4Q-PIT, Kyushu University, Fukuoka 819-0395

Abstract:

Various Ti-Mn-V based ternary alloys, known as AB2 type hydrogen storage alloys, were prepared and evaluated in order to clarify their crystal structures and hydrogen absorption/desorption properties. As a result, Mn-rich alloys with C14 laves structure were found to show a small hysteresis loop on absorbing/desorbing hydrogen. Furthermore, the effect of doping 4th and 5th element atoms on Ti-Mn-V based ternary alloys were evaluated. Then, Mn-rich Zr doped Ti-V-Mn alloys, like Ti30−xZrxV15Mn50, revealed most effective hydrogen storage capacity. Finally, we have found that a cooling process of melted alloys is important for synthesizing more homogeneous alloys, and successfully developed Ti25Zr10V15Mn50 with a rapid solidification process as one of the most effective hydrogen storage materials.

[doi:10.2320/jinstmet.JB201908]


(Received 2019/09/04)

Keywords:

titanium-manganese-vanadium alloy, hydrogen storage material, AB2 type


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