Mechanical spectroscopy of hydrogen-absorbing quasicrystals
Mechanical spectroscopy of hydrogen-absorbing quasicrystals
复制标题
吸氢准晶的机械光谱
DOI：
10.1016/j.msea.2003.08.076
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发表时间：
2004
期刊：
影响因子：
6.4
通讯作者：
I. Golovin
中科院分区：
文献类型：
--
作者：
H. Sinning;R. Scarfone;I. Golovin
采用振动簧片技术对 Zr69.5Cu12Ni11Al7.5 和 Ti53Zr27Ni20 进行比较，研究了二十面体准晶中 H 引起的阻尼峰，通常归因于 Snoek 型重定向机制。虽然 Zr69.5Cu12Ni11Al7.5 中的峰实际上与非晶相中的峰相同（符合金属玻璃中的二十面体短程有序），但两种准晶合金之间的峰形状和位置存在显着差异。这些可能用作区分二十面体结构类型的探针。另一个有趣的结果是，与非晶相相比，准晶 Zr69.5Cu12Ni11Al7.5 在 450 至 650K 之间具有更高的固有阻尼。
The H-induced damping peak in icosahedral quasicrystals, generally attributed to a Snoek-type reorientation mechanism, was studied in comparison between Zr69.5Cu12Ni11Al7.5and Ti53Zr27Ni20using the vibrating-reed technique. Whereas the peak in Zr69.5Cu12Ni11Al7.5is practically the same as in the amorphous phase (in accordance with icosahedral short-range order in metallic glasses), significant differences in shape and position of the peak are found between the two quasicrystalline alloys. These might possibly be used as a probe to distinguish between icosahedral structure types. Another interesting result is a higher intrinsic damping of quasicrystalline Zr69.5Cu12Ni11Al7.5, compared to the amorphous phase, between 450 and 650K.