Direct observation of solid-state reversed transformation from crystals to quasicrystals in a Mg alloy

IMR OpenIR

	Direct observation of solid-state reversed transformation from crystals to quasicrystals in a Mg alloy
	Liu, Jian-Fang; Yang, Zhi-Qing; Ye, Heng-Qiang; yangzq@imr.ac.cn
	2015
发表期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
卷号	5 页码:-
摘要	Phase transformation of quasicrystals is of interest in various fields of science and technology. Interestingly, we directly observed unexpected solid-state epitaxial nucleation and growth of Zn6Mg3Y icosahedral quasicrystals in a Mg alloy at about 573 K which is about 300 K below the melting point of Zn6Mg3Y, in contrast to formation of quasicrystals through solidification that was usually found in many alloys. Maximizing local packing density of atoms associated with segregation of Y and Zn in Mg adjacent to Mg/Zn3MgY interfaces triggered atomic rearrangement in Mg to form icosahedra coupled epitaxially with surface distorted icosahedra of Zn3MgY, which plays a critical role in the nucleation of icosahedral clusters. A local Zn: Mg: Y ratio close to 6:3:1, corresponding to a valence electron concentration of about 2.15, should have been reached to trigger the formation of quasicrystals at Mg/Zn3MgY interfaces. The solid-state icosahedral ordering in crystals opens a new window for growing quasicrystals and understanding their atomic origin mechanisms. Epitaxial growth of quasicrystals onto crystals can modify the surface/interface structures and properties of crystalline materials.
部门归属	[liu, jian-fang ; yang, zhi-qing ; ye, heng-qiang] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china
资助者	National Nature Science Foundation of China [51171189, 51371178, 51390473]
收录类别	sci
语种	英语
WOS记录号	WOS:000356134700001
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/74723
专题	中国科学院金属研究所
通讯作者	yangzq@imr.ac.cn
推荐引用方式 GB/T 7714	Liu, Jian-Fang,Yang, Zhi-Qing,Ye, Heng-Qiang,et al. Direct observation of solid-state reversed transformation from crystals to quasicrystals in a Mg alloy[J]. SCIENTIFIC REPORTS,2015,5:-.
APA	Liu, Jian-Fang,Yang, Zhi-Qing,Ye, Heng-Qiang,&yangzq@imr.ac.cn.(2015).Direct observation of solid-state reversed transformation from crystals to quasicrystals in a Mg alloy.SCIENTIFIC REPORTS,5,-.
MLA	Liu, Jian-Fang,et al."Direct observation of solid-state reversed transformation from crystals to quasicrystals in a Mg alloy".SCIENTIFIC REPORTS 5(2015):-.