Stable decagonal quasicrystals with a periodicity of 1·6 nm in Al-Pd-(Fe, Ru or Os) alloys
- 1 September 1991
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Letters
- Vol. 64 (3) , 163-167
- https://doi.org/10.1080/09500839108214684
Abstract
A decagonal (D) phase with a periodicity of 1·6 nm along the periodic axis (c-axis) was found in Al-Pd-Fe alloys in the melt-quenched state as well as the annealed state after conventional solidification. The D-structure is stable even after being annealed at 1110 K for 48 h. The stable D-phase was also found in Al-Pd-Ru and Al-Pd-Os alloys. In contrast with D-AlPd, one of the twofold diffraction patterns (P-pattern (see text)) shows a different extinction rule, indicating that D-AlPdFe has a novel structure with a different chemical ordering which is presumed to arise between Fe/Al or Fe/Pd.Keywords
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