Icosahedral hydrides of the Ti45Zr38Ni17-xCox nano-powders

A. Zywczak, D. Rusinek, J. Czub, M. Sikora, J. Stepień, Gondek, M. Gajewska, Akito Takasaki, A. Hoser

研究成果: Article


In this communication we report the phase transitions associated with a hydrogen uptake in the quasicrystalline Ti45Zr38Ni17-xCox alloys that were prepared by mechanical alloying. The crystal structure evolution of the alloys was characterized by means of the variety of diffraction techniques (X-ray, neutron, and electron) as well as extended X-ray absorption fine structure spectroscopy (EXAFS). That analysis was supported by the results of the thermodynamic measurements, namely differential scanning calorimetry (DSC) and thermal desorption spectroscopy (TDS). According to the neutron diffraction results, the transformation of the amorphous Ti45Zr38Ni17-xCox phases into the quasicrystalline state starts at the temperature of 475°C. At 525°C the icosahedral phase (the i-phase) is well-developed. At higher temperatures the i-phase transforms into the approximant w-phase and eventually into the cubic phase (the c-phase). The investigated icosahedral nano-powders exhibit a high capacity for gaseous H2 reaching 2.2 wt.% at elevated temperatures. After a hydrogen uptake, a complex phase constitution including the simple hydrides is evidenced. Although the i-phases form again after hydrogen desorption, they are accompanied by the additional Zr3Co phase.

ジャーナルJournal of Alloys and Compounds
出版物ステータスPublished - 2015 10 9

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

フィンガープリント Icosahedral hydrides of the Ti<sub>45</sub>Zr<sub>38</sub>Ni<sub>17-x</sub>Co<sub>x</sub> nano-powders' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用

    Zywczak, A., Rusinek, D., Czub, J., Sikora, M., Stepień, J., Gondek, Gajewska, M., Takasaki, A., & Hoser, A. (2015). Icosahedral hydrides of the Ti45Zr38Ni17-xCox nano-powders. Journal of Alloys and Compounds, 656, 702-706. https://doi.org/10.1016/j.jallcom.2015.09.278