Precipitation of binary quasicrystals along dislocations

IMR OpenIR

	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.
	2018-02-23
发表期刊	NATURE COMMUNICATIONS
ISSN	2041-1723
卷号	9 页码:-
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.
部门归属	[yang, zhiqing ; zhang, lifeng ; zhou, xinzhe ; ye, hengqiang] univ sci & technol china, shenyang natl lab mat sci, chinese acad sci, inst met res,sch mat sci & engn, shenyang 110016, peoples r china ; [yang, zhiqing ; chisholm, matthew f.] oak ridge natl lab, div mat sci & technol, oak ridge, tn 37831 usa ; [pennycook, stephen j.] natl univ singapore, dept mat sci & engn, singapore 117576, singapore
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
学科领域	Multidisciplinary Sciences
资助者	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
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79490
专题	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):-.