THE STUDY OF THE CRYSTALLINE STRUCTURE OF THE PHASES IN THE AL-NI ALLOYS ULTRARAPID SOLIDIFICATION BY THE METHOD OF X RAY DIFFRACTION

Authors : Lidia CRISTEA, Eufrosina OTLACAN, Enona CRISTEA

Pages : 45-48

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Publication Date : 2007-03-01

Article Type : Research Paper

Abstract :Melt –spinning and melt extraction methods of rapid solidification have been applied on Al-Ni alloys in the lower and higher composition. For orientate appreciations of the peripheric speed of the cooling disk it is used the dependence between the thickness of the solidified fibers and the peripheric speed of the extraction disk. The cooling speed calculated on the basis of the thermic transfer coefficient in accordance with the thickness of the fibers has lead to values of the cooling speed of the one million C/sec for fibres of 100 micrometers. Alloys with 1,86 % Ni content in pouring status and ultra-rapid solidificated have been analysed from the point of crystalline structure. The paper it’s a short analysis of the use of the X-ray diffraction techniques for observing the effects of ultra-rapid solidification in Al-Ni alloys. This technique permit to observe highlighting the imperfections in the crystal pattern.
Keywords : THE STUDY, OF THE CRYSTALLINE, STRUCTURE OF THE PHASES IN THE AL NI ALLOYS ULTRARAPID SOLIDIFICATION, BY THE METHOD, OF X RAY DIFFRACTION