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

Frey, Friedrich; Weidner, Eveline; Hradil, K.; Boissieu, M. de; Letoublon, A.; McIntyre, G.; Currat, R. und Tsai, A.-P. (2002): Temperature dependence of the 8-Å superstructure in decagonal Al-Co-Ni. In: Journal of Alloys and Compounds, Vol. 342, No. 1-2: pp. 57-64

Abstract

Diffuse layers corresponding to an 8 Å 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 °C. The diffuse layers consist of an unstructured diffuse background, diffuse bands, and diffuse maxima which (almost) all vanish above 900 °C, 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 1D-columnar cluster model is compared to the experimental results.

• Item Type: Journal article
• Faculties: Geosciences > Department of Earth and Environmental Sciences > Crystallography and Materials Science
• Subjects: 500 Science > 550 Earth sciences and geology
• Language: English