关键词: 准晶, 氘, Ti-Zr-Ni-Pd合金, 再生.

Abstract: Ti/Zr-based icosahedral quasicrystals are a kind of promising hydrogen storage materials, however their absorption regeneration after oxidation-poisoning has been scarcely studied. This work is intended to investigate the deuterium-storage regeneration of a suction-cast Ti₃₆Zr₄₀Ni₂₀Pd₄ quasicrystal. It was found that only through hot vacuuming the quasicrystal could be refreshed from air-flow poisoning to absorb deuterium in two cycles. During the first absorption course, a pregnancy period was observed before the real deuterium uptake while deuterium was loaded rapidly during the second one. The deuterium concentration in the alloy can reach 0.011 mol?D₂/(g?M) (corresponding to a hydrogen mass percent of 2.2%. D₂ and M denote molecular deuterium and the metallic alloy). But the loaded deuterium was very difficult to release completely even by eight-stage desorption at different temperatures. After the second desorption, the quasicrystal phase remained in a small volume, as though the desorption temperature was beyond the crystallization temperature of the quasicrystal. This probably is attributed to the solution function of residual deuterium in the alloy.

Key words: Regenerate deuterium absorption, Ti₃₆Zr₄₀Ni₂₀Pd₄ , Icosahedral quasicrystal