Study of the Crystallization Kinetics of Zr<SUB>60</SUB>Al<SUB>15</SUB>Ni<SUB>25</SUB> Bulk Glassy alloy by Differential Scanning Calorimetry

Abstract

This paper investigates the crystallization kinetics of Zr 60 Al 15 Ni 25 bulk glassy alloy under isothermal annealing by differential scanning calorimetry (DSC). The results show that the incubation time is very small even at low annealing temperature (743 K) and increases slightly with the annealing temperature decreasing, which suggests a growth-controlled crystallization process. However, the exothermic peak width, reflecting the time for the actual crystallization process, increases greatly when annealing temperature decreases. The Avrami exponents indicate that the crystallization mechanism changes at different annealing temperatures. The change of the crystallization mechanism is attributed to the great difference of the mobility ability of atoms at different temperatures.

Impact of Pretreatment of Metal Glass Fe70Cr15B15 on Anodization in 1-butyl-3-methylimidazolium Tetrafluoroborate Ionic Liquid

“…The amorphous Fe70Cr15B15 alloy (AA) was prepared in an electric arc furnace in an argon atmosphere with the triple remelting procedure. Impinging a stream of molten alloy on the outer surface of a rotating cylinder in an argon atmosphere was used to convert the obtained crystalline sample to the amorphous state [22]. The ribbon parameters were: width 7-10 mm, thickness 10 µm.…”