Discovery of core-shell quasicrystalline particles

被引：6

作者：

Yang, Tong ^{[1
,2
]}

Kong, Yi ^{[1
]}

Du, Yong ^{[1
]}

Li, Kai ^{[1
]}

Schryvers, Dominique ^{[2
]}

机构：

[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China

[2] Univ Antwerp, Electron Microscopy Mat Sci EMAT, B-2020 Antwerp, Belgium

来源：

SCRIPTA MATERIALIA | 2023年 / 222卷

基金：

中国国家自然科学基金;

关键词：

Quasicrystal; Precipitation; High -angle annular dark field (HAADF); Electron diffraction; AL-NI-FE; ELECTRON-MICROSCOPY; PHASE; QUASICRYSTAL; MODEL;

D O I：

10.1016/j.scriptamat.2022.115040

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Submicron-sized quasicrystalline particles were obtained in an Al-Zn-Mg-Cu alloy produced by traditional melting. These particles consist of an Al-Fe-Ni core and a Mg-Cu-Zn shell and were found to be stable and embedded randomly in the Al matrix. The diffraction patterns of these core-shell particles reveal a decagonal core and an icosahedral shell with, respectively, ten- and five-fold axes aligned. High resolution scanning transmission electron microscopy of the Mg-Cu-Zn shell confirms the five-fold symmetry atomic arrangement and the icosahedral structure. It can therefore be concluded that Fe and Ni impurities play an important role in mediating the formation of such an unusual ternary core-shell quasicrystalline particle. These findings provide some novel insights in the formation of quasicrystals in traditional industrial Al alloys.

引用

页数：6