Influence of elemental diffusion on low temperature formation of MgH2 in TiMn1.3T0.2Mg (T = 3d-transition elements)

K. Yamamoto, S. Tanioka, Y. Tsushio, T. Shimizu, T. Morishita, S. Orimo, H. Fujii

研究成果: Article査読

14 被引用数 (Scopus)


In order to examine the influence of the elemental diffusion from the host compound into the Mg region on low temperature formation of MgH2, we have investigated the hydriding properties and the microstructures of the composite materials TiMn1.3T0.2-Mg (T=V, Cr, Mn, Fe, Co, Ni and Cu). MgH2 is formed at 353 K in all composite materials. Of all the substitutions, the amount of MgH2 is the largest in the case of the Cu substitution, which originates from the existence of the Mg-Mg2Cu eutectic formed by Cu diffusion from the host compound TiMn1.3Cu0.2 into the Mg region during the liquid phase sintering. In addition, the hydrogen capacity of TiMn1.3Cu0.2-Mg (that is TiMn1.3Cu0.1-(Mg+Mg2Cu) after the sintering) easily saturates in comparison with TiMn1.5-(Mg+Mg2Cu) without Cu diffusion. It is concluded that Cu diffusion promotes the mobility of hydrogen atoms at the complex interface between the host compound and the Mg region.

ジャーナルJournal of Alloys and Compounds
出版ステータスPublished - 1996 10 15

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学


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