Hydrogen absorption and electrochemical properties of Mg 2-xNi (x=0-0.5) alloys prepared by bulk mechanical alloying

Toshiro Kuji, Hiroaki Nakano, Tatsuhiko Aizawa

研究成果: Conference article査読

34 被引用数 (Scopus)

抄録

Thermodynamic properties of hydrides of Mg 2-xNi alloys produced by bulk mechanical alloying were determined from the pressure-composition isotherms for absorption over the temperatures from 623 to 423 K. The van't Hoff plots for the plateau pressures of the isotherms clearly indicated the existence of high- and low-temperature hydrides with different entropy and enthalpy for hydride formation. The phase transition temperature was 525 K for Mg 2.0Ni and decreased with increasing value of x. Chemical and electrochemical behaviors of Mg 2-xNi alloys in an alkaline solution were precisely determined. It was found that hydrogen absorption in Mg 2-xNi alloys takes place by only immersing the alloys in 6 M KOH solution. On the other hand, during electrical charging hydrogen content increased with the quantity of charged electricity and reached the maximum value. However, the hydrogen content decreased afterwards because the corrosion of the alloys in the alkaline solution is significant.

本文言語English
ページ(範囲)590-596
ページ数7
ジャーナルJournal of Alloys and Compounds
330-332
DOI
出版ステータスPublished - 2002 1 17
イベントProceedings of the International Symposium on Metal-Hydrogen (MH 2000) - Noosa Heads, QLD, Australia
継続期間: 2000 10 12000 10 6

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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