Internal friction of an Al–Cu–Fe icosahedral quasicrystal and its crystal approximant

So, Yeong-Gi; Sato, Shun; Edagawa, Keiichi; Tamura, Ryuji

doi:10.1080/14786435.2010.511596

Cited by 2 publications

(1 citation statement)

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“…In particular, the internal friction peak observed for the i-phase at around 800 K was reasonably interpreted as originating in a phason relaxation process involving collective atomic motion, which was absent in the 1/1-phase and present at a much reduced intensity in the 2/1 phase. Recently, So et al 10) investigated the internal friction related to the phason relaxation in the AlCuFe i-phase and its 1/1 approximant phase. Here, an internal friction peak attributable to correlated phason jumps was observed only for the i-phase, similar to the case of the AlPdMn system.…”

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confidence: 99%

Internal Friction of an Ag–In–Yb Icosahedral Quasicrystal

Handa

Kamimura

et al. 2014

Mater. Trans.

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Internal friction has been measured for an AgInYb Tsai-type icosahedral (i-) quasicrystal to investigate an energy-dissipation mechanism by phason relaxation, possibly operating in quasicrystals. A fairly large peak of the magnitude Q À1 % 0:022 was observed, which was shown to be of the thermally-activated relaxation type. The frequency factor and activation enthalpy were evaluated to be 10 20 s ¹1 and 2:6 Â 10 À19 J (1.6 eV), respectively. The observed peak was analyzed on the assumption that it is of phason-origin. The magnitude of the phonon-phason coupling constant was estimated to be 0:008® (®: shear modulus), based on the model of the phonon-phason elastodynamics previously proposed. This value is comparable to those previously reported for Mackay-type i-phases such as i-AlPdMn and i-AlCuFe.

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confidence: 99%