Precipitation of binary quasicrystals along dislocations

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	Precipitation of binary quasicrystals along dislocations
	Yang, ZQ; Zhang, LF; Chisholm, MF; Zhou, XZ; Ye, HQ; Pennycook, SJ; Yang, ZQ (reprint author), Univ Sci & Technol China, Shenyang Natl Lab Mat Sci, Chinese Acad Sci, Inst Met Res,Sch Mat Sci & Engn, Shenyang 110016, Peoples R China.; Chisholm, MF (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.; Pennycook, SJ (reprint author), Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117576, Singapore.
刊名	NATURE COMMUNICATIONS
	2018-02-23
卷号	9 页码:-
关键词	Zn-y Alloys Transmission Electron-microscopy Zk60 Magnesium Alloy Superplastic Behavior Orientational Order Materials Science Atomic-structure High-strength Mg Alloy Phases
ISSN号	2041-1723
英文摘要	Dislocations in crystals naturally break the symmetry of the bulk, introducing local atomic configurations with symmetries such as fivefold rings. But dislocations do not usually nucleate aperiodic structure along their length. Here we demonstrate the formation of extended binary quasicrystalline precipitates with Penrose-like random-tiling structures, beginning with chemical ordering within the pentagonal structure at cores of prismatic dislocations in Mg-Zn alloys. Atomic resolution observations indicate that icosahedral chains centered along [0001] pillars of Zn interstitial atoms are formed templated by the fivefold rings at dislocation cores. They subsequently form columns of rhombic and elongated hexagonal tiles parallel to the dislocation lines. Quasicrystalline precipitates are formed by random tiling of these rhombic and hexagonal tiles. Such precipitation may impact dislocation glide and alloy strength.; Dislocations in crystals naturally break the symmetry of the bulk, introducing local atomic configurations with symmetries such as fivefold rings. But dislocations do not usually nucleate aperiodic structure along their length. Here we demonstrate the formation of extended binary quasicrystalline precipitates with Penrose-like random-tiling structures, beginning with chemical ordering within the pentagonal structure at cores of prismatic dislocations in Mg-Zn alloys. Atomic resolution observations indicate that icosahedral chains centered along [0001] pillars of Zn interstitial atoms are formed templated by the fivefold rings at dislocation cores. They subsequently form columns of rhombic and elongated hexagonal tiles parallel to the dislocation lines. Quasicrystalline precipitates are formed by random tiling of these rhombic and hexagonal tiles. Such precipitation may impact dislocation glide and alloy strength.
学科主题	Multidisciplinary Sciences
语种	英语
资助机构	NSF of China [51371178, 51390473, 51771202]; Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-JSC027]; U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division; National University of Singapore
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79490]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yang, ZQ; Yang, ZQ (reprint author), Univ Sci & Technol China, Shenyang Natl Lab Mat Sci, Chinese Acad Sci, Inst Met Res,Sch Mat Sci & Engn, Shenyang 110016, Peoples R China.; Chisholm, MF (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.; Pennycook, SJ (reprint author), Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117576, Singapore.
推荐引用方式 GB/T 7714	Yang, ZQ,Zhang, LF,Chisholm, MF,et al. Precipitation of binary quasicrystals along dislocations[J]. NATURE COMMUNICATIONS,2018,9:-.
APA	Yang, ZQ.,Zhang, LF.,Chisholm, MF.,Zhou, XZ.,Ye, HQ.,...&Pennycook, SJ .(2018).Precipitation of binary quasicrystals along dislocations.NATURE COMMUNICATIONS,9,-.
MLA	Yang, ZQ,et al."Precipitation of binary quasicrystals along dislocations".NATURE COMMUNICATIONS 9(2018):-.