Phase Evolution and Thermal Stabilities of Amorphous Al85Nd5Ni10 Alloy

Abstract

In this work, the heat effect on the crystallization of amorphous Al₈₅Nd₅Ni₁₀ alloy was produced by means of rapid solidified was investigated in heat treatment by differential scanning calorimetry (DSC) and X-ray diffraction (XRD). Continuous heating DSC trace of amorphous Al₈₅Nd₅Ni₁₀ alloy consisted of three exothermic peaks. The onset and peak temperatures for these peaks shifted toward higher temperatures when the heating rate was increased. Activation energies for the three exothermic peaks determined by the Kissinger method, which gives as 251, 341 and 260 kJ/mol, respectively. Isothermal annealing DSC traces for the first crystallization peak was showed one-dimensional growth by JohnsonMehlAvrami kinetics (JMA) with an Avrami exponent n of 1.0-1.4. .......

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