Temperature dependence of the 8-Å superstructure in decagonal Al-Co-Ni

被引：12

作者：

Frey, F ^{[1
]}

Weidner, E

Hradil, K

de Boissieu, M

Letoublon, A

McIntyre, G

Currat, R

Tsai, AP

机构：

[1] Univ Munich, Inst Kristallog & Angew Mineral, D-80333 Munich, Germany

[2] Univ Wurzburg, Inst Mineral, D-97074 Wurzburg, Germany

[3] ENSEEG, LTPCM, CNRS, F-38042 St Martin Dheres, France

[4] ILL, F-38042 Grenoble, France

[5] NIMS, Tsukuba, Ibaraki 3050047, Japan

[6] Iowa State Univ, Ames, IA USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2002年 / 342卷 / 1-2期

关键词：

decagonal quasicrystal; diffuse layers; periodic superstructure; high temperature; neutron diffraction;

D O I：

10.1016/S0925-8388(02)00134-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Diffuse layers corresponding to an 8 Angstrom superperiod along the 'periodic' axis of decagonal Al-Ni-Co phases were investigated by in situ X-ray and neutron diffraction at temperatures up to 980 degreesC. The diffuse layers consist of an unstructured diffuse background, diffuse bands, and diffuse maxima which (almost) all vanish above 900 degreesC, but show a different temperature dependence in detail. A tentative scenario of the related structural ordering process during cooling from high temperature is developed. A ID-columnar cluster model is compared to the experimental results. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：57 / 64

页数：8

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