Article,
Kinetics of crystallization of amorphous Mg80Cu10Y10
Zeitschrift für Metallkunde, 96 (12): 1341--1350 (2005)
Abstract
The crystallization kinetics of an amorphous magnesium-rich Mg80Cu10Y10
alloy has been determined by isothermal and isochronal differential
scanning calorimetry combined with ex-situ X-ray diffraction for
phase analysis. Microstructure analysis has been performed by means
of transmission electron microscopy. Complete crystallization of
Mg80Cu10Y10 has been found to take place in three steps. Independent
of the type of annealing, during the first crystallization process
at around 430 K particles of several phases are formed with an equiaxed
morphology. Kinetic analysis applying a new analytical model demonstrated
that Avrami nucleation and volume-diffusion-controlled growth are
the operating nucleation and growth modes. The effect of yttrium
on the transformation kinetics has been discussed.
Tags
- alloys;
- amorphous
- avrami
- dsc;
- growth}
- kinetics;
- mg
- nucleation;
- volume-diffusion-controlled
- {crystallization
