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Novel kind of decagonal ordering in Al74Cr15Fe11
Haikun Ma1, Zhanbing He2, Hua Li1
1State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China.
Nature Communications
|December 5, 2020
Summary
Researchers discovered a novel quasiperiodic structure in the Al74Cr15Fe11 intermetallic compound. This structure differs from known ones, utilizing Lück decagons instead of Gummelt decagons.
Area of Science:
- Materials Science
- Crystallography
- Solid-State Physics
Background:
- Quasiperiodic structures in intermetallic compounds are complex and exhibit unique atomic arrangements.
- Previous studies often describe these structures using unit cells based on Gummelt decagons.
Purpose of the Study:
- To investigate the structural characteristics of the Al74Cr15Fe11 intermetallic compound.
- To identify and describe novel quasiperiodic structural motifs.
Main Methods:
- High-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) was employed.
- Detailed structural analysis of the Al74Cr15Fe11 compound was performed.
Main Results:
- A novel quasiperiodic structure was identified in Al74Cr15Fe11.
- The observed structure deviates from previously known quasiperiodic arrangements.
- The structure is related to Lück decagons and can be described by a Hexagon-Bow-Tie tiling.
Conclusions:
- The Al74Cr15Fe11 intermetallic compound exhibits a unique quasiperiodic structure.
- This finding expands the understanding of quasiperiodic ordering in complex materials.
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