Ti-Zr-Ni系準結晶の水素吸収と構造

概要

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Results of transmission Electron Microscopy of expansion of a lattice accompany hydrogen absorption are reported. The icosahedral phase (i phase), the crystal approximant phase (w phase) and the Laves phase in a Ti-Zr-Ni alloy demonstrated hydrogen absorption from the gas phase at a temperature of 300℃ and a pressure of 10 Torr. The i phase, the w phase and the Laves phase remained after the hydrogen absorption, giving a hydrogen atom-to-metal atom ratio ( [H]/[M] ) of 1.14. The rate of expansion of lattice depended on the lattice structure. The rate of expansion of the lattice was analyzed, and it was found that the ability of the w phase to absorb hydrogen is greater that of the i phase. Expansion of a lattice of the i phase and that of the w phase are isotropic. The results indicate that hydrogen is homogeneously distributed.
富山大学の論文