Effect of the Heating Rate on Crystallization Kinetics of Mg84Ni12.5Y3.5 Amorphous Ribbons |
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| Authors: | Korin E Soifer L Mogiliyanskii D Soifer Ya Brodova I Manuhin A |
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| Institution: | (1) Department of Chemical Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva, 84105, Israel;(2) Institute of Solid State Physics, Chernogolovka, 142432, Russia;(3) Institute of Metals Physics, Kovalevskaya Str. 18, Ekaterinburg, 620219, Russia |
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| Abstract: | Crystallization kinetics of Mg84Ni12.5Y3.5 amorphous ribbons produced by the melt-spinning method, was studied by DSC analysis and X-ray diffraction. The effect of heating rate (from 2 to 240 K min–1) was investigated in the temperature range from 298 to 673 K. The results showed that the crystallization process took place in two stages: a) crystallization of part of the amorphous matrix to an intermediate phase and hcp-Mg, and b) transformation of the intermediate phase and the remaining amorphous material to Mg2Ni+Mg (solid solution of Y in Mg). Increasing the heating rate from 2 to 240 K min–1 results in increases of the temperature difference between the two-step crystallization of the first stage transformation processes from 33 to 56 K and in increases of the temperature difference between the two-stage transformation from 62 to 97 K.This revised version was published online in November 2005 with corrections to the Cover Date. |
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| Keywords: | crystallization kinetics intermediate nanocrystal phase Mg– Ni– Y amorphous ribbons |
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