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Crystallization-Induced Phason Relaxation in Icosahedral Al-Pd-Mn Alloys
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A melt-quenched icosahedral (i-) phase with a composition such as Al74Pd17Mn9 close to but is deviated slightly from the ideal composition (Al70Pd20Mn10) of stable i-AlPdMn alloy, containing significant phason strains. It transforms to a phason-free i-phase accompanied by crystallization upon annealing at sufficiently high temperature. The composition of the i-grains approaches the ideal after the transformation. Such phason strain relaxation was not observed in the melt-quenched Al75Pd15Mn10
i-phase, for which composition considerably deviates from the ideal composition; crystallization occurs without redistribution in the composition. It was suggested that a highly stable i-phase occurs in the ground state when it has the ideal composition.
Title: Crystallization-Induced Phason Relaxation in Icosahedral Al-Pd-Mn Alloys
Description:
A melt-quenched icosahedral (i-) phase with a composition such as Al74Pd17Mn9 close to but is deviated slightly from the ideal composition (Al70Pd20Mn10) of stable i-AlPdMn alloy, containing significant phason strains.
It transforms to a phason-free i-phase accompanied by crystallization upon annealing at sufficiently high temperature.
The composition of the i-grains approaches the ideal after the transformation.
Such phason strain relaxation was not observed in the melt-quenched Al75Pd15Mn10
i-phase, for which composition considerably deviates from the ideal composition; crystallization occurs without redistribution in the composition.
It was suggested that a highly stable i-phase occurs in the ground state when it has the ideal composition.
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