Nucleation mechanism of the sigma-to-alpha phase transition in Fe_1-xCr_x

Autor(en)

Alice Mikikits-Leitner, Bogdan Sepiol, Michael Leitner, Jakub Cieslak, Stanislaw Mieczyslaw Dubiel

Abstrakt

This Rapid Communication reports on Mossbauer-spectroscopy measurements of the kinetics of the sigma-to-alpha phase transition in the system Fe-Cr. By isothermally annealing samples of the compositions Fe53.8Cr46.2 and Fe51Cr49 at temperatures between 820 and 855 degrees C the authors gained information about the kinetics of the phase transition in terms of the Johnson-Mehl-Avrami-Kolmogorov equation. The obtained values for the Avrami exponent allow to draw conclusions about the type of nucleation mechanism. The behavior of the Avrami exponent for near-critical temperatures and for higher temperatures indicates a change in the nucleation mechanism with T-T-c.

Organisation(en)

Dynamik Kondensierter Systeme

Externe Organisation(en)

AGH University of Science and Technology

Journal

Physical Review B

Band

82

Anzahl der Seiten

4

ISSN

1098-0121

DOI

https://doi.org/10.1103/PhysRevB.82.100101

Publikationsdatum

2010

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/407a47b0-24f2-482c-8136-f1d495fe3dbe