Abstract Specific properties of quasicrystals (QCs) with regards to their structures are discussed with emphasis on diffusion process. To fulfil this, regular mechanisms in the solids are introduced. The experimental results show that the predominant mechanism in quasicrystals is phason which is caused by the absence of proper matching in their structure and the vacancies in the lattice. Monolayers of Al were deposited on the surface of an i-Al-Pd-Mn quasicrystal at constant temperature and the diffusion of the elements into the surface measured by low energy ion scattering. According to our results the activation energy for Al diffusion in the i-Al-Pd-Mn quasicrystal is found to be smaller than that for Al diffusion in regular crystals. It was therefore concluded that a phason mechanism controlled the diffusion. The results of this work can be phason mechanism predominate which is agreement with the some theoretical scientists who believe to phason mechanism at least in low temperatures.

中文翻译：

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准晶体结构中扩散的相子机制

摘要 讨论了准晶 (QC) 在结构方面的特定性质，重点是扩散过程。为了实现这一点，引入了固体中的规则机制。实验结果表明，准晶体中的主要机制是相子，这是由于它们的结构和晶格中的空位缺乏适当的匹配而引起的。在恒定温度下，Al 单层沉积在 i-Al-Pd-Mn 准晶的表面上，并通过低能离子散射测量元素向表面的扩散。根据我们的结果，发现 i-Al-Pd-Mn 准晶中 Al 扩散的活化能小于常规晶体中 Al 扩散的活化能。因此得出结论，相子机制控制了扩散。