Home
Resources
Publications
In-Situ Observation of Local Atomic Structure of Al-Cu-Fe Quasicrystal Formation

In-Situ Observation of Local Atomic Structure of Al-Cu-Fe Quasicrystal Formation

Hadi Parsamehr, Ying-Jiu Lu, Tzu-Ying Lin, An-Pang Tsai, Chih-Huang Lai

Sci Rep. 2019 Feb 4;9(1):1245.

PMID: 30718572

Abstract:

The phase and local environment, neighbouring atoms and coordination numbers (CN), for an Al-Cu-Fe multilayer were studied during heating (to 800 °C) and cooling (to room temperature) processes using in-situ X-Ray diffraction (XRD) and in-situ X-ray absorption spectroscopy (XAS) techniques to investigate the formation of Al-Cu-Fe quasicrystals (QCs). In-situ XRD clarified the transition of the ω-Al7Cu2Fe phase to a liquid state at the high temperature which transformed into the QC phase during cooling. The in-situ XAS showed a relatively small shift in distance between Cu-Al and Fe-Al during the phase evolution from RT to 700 °C. The distance between Cu-Cu, however, showed a significant increase from ω-phase at 700 °C to the liquid state at 800 °C, and this distance was maintained after QC formation. Furthermore, the CN of Fe-Al was changed to N = 9 during cooling. Through our observations of changes in CN, atomic distances and the atomic environment, we propose the local structural ordering of the quasicrystalline phase originated from a liquid state via ω-phase. In this study, we give a clear picture of the atomic environment from the crystalline to the quasicrystalline phase during the phase transitions, which provides a better understanding of the synthesis of functional QC nanomaterials.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS75301	AlCuFe quasicrystal			Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: