Table of Contents
ISRN Metallurgy
Volume 2012, Article ID 602108, 5 pages
http://dx.doi.org/10.5402/2012/602108
Research Article

Study of Amorphous-Crystalline Phase Transformations by DSC and Dilatometer in the Case of Al-Based Amorphous Alloys

1Wigner Research Centre for Physics, Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, P.O. Box 49, Budapest 1525, Hungary
2Faculty of Materials Science and Engineering, Transylvania University, Bulevardul Eroilor, No. 29, 500036 Brasov, Romania

Received 21 August 2012; Accepted 11 September 2012

Academic Editors: R. Hebert and A. Tuissi

Copyright © 2012 Éva Fazakas et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The amorphous-crystalline transformation is studied by DSC and dilatometer. From the DSC signal the characteristic temperatures and the heat evolved during each transformation step can be determined. The dilatometer depicts the thermal contractions accompanying the changes in topological short range order. Although the characteristics temperatures determined by DSC and dilatometer, two methods are slightly different their dependences on the heating rate are very similar, where from the activation energies of each transformation steps can be determined using the Kissinger plots. As an example, two aluminum-based amorphous ribbon samples (Al88Mm5Ni5Co2 and Al85Y8Ni5Co2) will be measured and compared.