Synthesis and Investigation of Quaternary Quasi-Crystalline Phase in Al – Cu – Fe – Cr Alloys


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Abstract

Formation of a quasi-crystalline phase under rapid solidification and heat treatment of alloys of the Al – Cu – Fe – Cr system is studied. The study is performed by x-ray diffractometry, optical, scanning and transmission electron microscopy and differential scanning calorimetry. It is shown that the quasi-crystalline Al65Cu20Fe10Cr5 phase is a mixture of icosahedral and decagonal phases. The substitution of iron with chromium destabilizes the icosahedral I-phase and promotes formation of a decagonal d-phase. After quenching from 880°C, the Al64Cu24Fe10Cr2 alloy acquires a pure I-phase, and the Al64Cu24Fe8Cr4 alloy acquires a d-phase.

About the authors

Yifan Wang

College of Materials Science and Engineering, North University of China

Email: zhaoyuhong@nuc.edu.cn
China, Taiyuan

Hua Hou

College of Materials Science and Engineering, North University of China

Email: zhaoyuhong@nuc.edu.cn
China, Taiyuan

Yuhong Zhao

College of Materials Science and Engineering, North University of China

Author for correspondence.
Email: zhaoyuhong@nuc.edu.cn
China, Taiyuan

Jinzhong Tian

College of Materials Science and Engineering, North University of China

Email: zhaoyuhong@nuc.edu.cn
China, Taiyuan

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