High resolution study of a quasiperiodic grain boundary in gold

被引：13

作者：

Pénisson, JM

Lançon, F

Dahmen, U

机构：

[1] CEA, Dept Rech Fondamentales Mat Condensee, F-38054 Grenoble 9, France

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA

来源：

INTERGRANULAR AND INTERPHASE BOUNDARIES IN MATERIALS, IIB98 | 1999年 / 294-2卷

关键词：

electron microscopy; atomic modeling; quasicrystals;

D O I：

10.4028/www.scientific.net/MSF.294-296.27

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A mazed bicrystal of gold has been obtained by vacuum deposition of gold onto a [001] germanium substrate. Amongst the different grain boundaries existing in this bicrystal, there exits facets which are completely assymetric and presenting a non periodic structure. It is shown that specific groups of atoms are present. Their spatial distribution along the boundary plane is analyzed. The diffractogram of the experimental high resolution images reveals the presence of intensity streaks in a non periodic distribution. The calculated structure of this boundary is in good agreement with the experimentally observed one. The complete analysis of the experimental results leads to the conclusion that this boundary represents a one dimensional quasi-crystal.

引用

页码：27 / 34

页数：8

共 12 条

[1]

DAHMEN U, 1991, MATER RES SOC SYMP P, V229, P167

[2] ATOMIC-STRUCTURE OF A SIGMA-99 GRAIN-BOUNDARY IN ALUMINUM - A COMPARISON BETWEEN ATOMIC-RESOLUTION OBSERVATION AND PAIR-POTENTIAL AND EMBEDDED-ATOM SIMULATIONS [J].