Incommensurate modulated structure in the icosahedral quasicrystalline phase T2 of an Al-Li-Cu alloy

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	Incommensurate modulated structure in the icosahedral quasicrystalline phase T2 of an Al-Li-Cu alloy
	Yu, DP ; Zhang, Z ; Baluc, N
刊名	PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES
	1996
卷号	73 期号:2 页码:499
关键词	TRANSMISSION ELECTRON-MICROSCOPY QUASI-CRYSTALS DISLOCATIONS
ISSN号	0141-8610
通讯作者	Yu, DP: CHINESE ACAD SCI, BEIJING LAB ELECTRON MICROSCOPY, POB 2724, BEIJING 100080, PEOPLES R CHINA.
中文摘要	Evidence was obtained for an incommensurate modulated phase in an Al-Li-Cu quasicrystal with the icosahedral structure using transmission electron microscopy. The modulated phase exhibits lamellar contrast, but globally shows pseudo icosahedral point group symmetry. The modulation results in a nearly two-dimensional periodic array of the diffraction spots in a reciprocal plane perpendicular to the 2-fold icosahedral axis [0/00/00/2], while quasiperiodic order remains in the third direction. One of the modulation directions is parallel to a pseudo 2-fold axis in between a 3-fold [-1/-20/-10/0] and a 5-fold [-1/00/-10/0] axis, which is approximately 11 degrees away from the [-1/-20/-10/0] axis. Another modulation direction is 5 degrees from a 5-fold axis of [1/00/-10/0]. The amplitudes of the modulation are \a\ = 0.38 nm(-1) (2.6 nm) and \b\ = 0.44 nm(-1) (2.2 nm), respectively. The modulation was interpreted on the basis of the cut and projection method of curved atomic hypersurfaces in a high-dimensional hyperspace onto physical space, and in real space this modulation was suggested to correspond to the existence of two different periods for the aluminium and copper atomic positions in the superstructure.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/39739]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Yu, DP,Zhang, Z,Baluc, N. Incommensurate modulated structure in the icosahedral quasicrystalline phase T2 of an Al-Li-Cu alloy[J]. PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES,1996,73(2):499.
APA	Yu, DP,Zhang, Z,&Baluc, N.(1996).Incommensurate modulated structure in the icosahedral quasicrystalline phase T2 of an Al-Li-Cu alloy.PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES,73(2),499.
MLA	Yu, DP,et al."Incommensurate modulated structure in the icosahedral quasicrystalline phase T2 of an Al-Li-Cu alloy".PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES 73.2(1996):499.