ON THE DETERMINATION OF THE BURGERS VECTOR OF QUASI-CRYSTAL DISLOCATIONS BY TRANSMISSION ELECTRON-MICROSCOPY

被引：82

作者：

WOLLGARTEN, M ^{[1
]}

GRATIAS, D ^{[1
]}

ZHANG, Z ^{[1
]}

URBAN, K ^{[1
]}

机构：

[1] CNRS,CTR ETUD CHIM MET,F-94400 VITRY,FRANCE

来源：

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES | 1991年 / 64卷 / 04期

关键词：

D O I：

10.1080/01418619108213951

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The contrast of dislocations in icosahedral quasicrystals observed by transmission electron microscopy is discussed in the framework of the kinematical theory of electron diffraction. It is found that, owing to the special structural features of dislocations in quasiperiodic lattices, there are two basically different imaging conditions for which the contrast can vanish. The conditions are established for contrast experiments in which the direction of the Burgers vector components can be determined in physical and orthogonal space. Provided that the dislocation displacement field fulfils certain requirements, contrast experiments employing both extinction conditions permit the defect to be characterized by the direction of a Burgers vector in the six-dimensional reference space of icosahedral quasicrystals.

引用

页码：819 / 833

页数：15

共 37 条

[1] ICOSAHEDRAL CRYSTALS FROM CUTS IN 6-DIMENSIONAL SPACE [J].