A new series of Al-Pd-based ordered icosahedral quasicrystals and their electrical resistivities

摘要

X-ray measurements on smaples of Al-Pd-(Fe,Ru,Os) systems with various annealing temperatures and times have been performed in order to gain insights into formations of icosahedral (I) phases and related approximants and to produce single phases of them.As a result,well ordered I phases have been obtaiend in Al-Pd-(Ru,Os) systems when annealed at 1000 deg C for several hours.Formations of the (1/0-1/0-1/0) and the (2/1-2/1-2/1) approximants ahve been observed in wide compositional ranges in Al-Pd-(Fe,Ru,Os) and Al-Pd-(Ru,Os) systems,respectively.