DISCOMMENSURATE MICROSTRUCTURES IN PHASON-STRAINED OCTAGONAL QUASI-CRYSTAL PHASES OF MO-CR-NI

被引：12

作者：

JIANG, JC

FUNG, KK

KUO, KH

机构：

[1] UNIV SCI & TECHNOL,DEPT MAT PHYS,BEIJING 100083,PEOPLES R CHINA

[2] HONG KONG UNIV SCI & TECHNOL,DEPT PHYS,KOWLOON,HONG KONG

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.68.616

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Phason-strained octagonal quasicrystal phases of Mo-Cr-Ni have been studied by electron diffraction and dark-field imaging. Diffraction patterns of the twofold axes show that some spots are shifted and split along the fourfold axis. Discommensurations (DCs) observed in dark-field images of the split reflections are aligned perpendicular to the fourfold axis. The density of the DCs in widely separated and adjacent regions may vary by more than 1 order of magnitude. Our observations are consistent with some of the results of the two-dimensional octagonal random tiling model of Li, Park, and Widom.

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页码：616 / 619

页数：4

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