Temperature dependence of the 8-angstrom superstructure in decagonal Al-Co-Ni
Journal of Alloys and Compounds 342(1-2): 57-64
de Boissieu M
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.