Non-Isothermal Kinetic Analysis of the Crystallization of Metallic Glasses Using the Master Curve Method

The non-isothermal transformation rate curves of metallic glasses are analyzed with the Master Curve method grounded in the Kolmogorov-Johnson-Mehl-Avrami theory. The method is applied to the study of two different metallic glasses determining the activation energy of the transformation and the expe...

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Autores principales: Torrens-Serra, Joan, Venkataraman, Shankar, Stoica, Mihai, Kuehn, Uta, Roth, Stefan, Eckert, Jürgen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2011
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Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5448886/
https://www.ncbi.nlm.nih.gov/pubmed/28824135
http://dx.doi.org/10.3390/ma4122231
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author Torrens-Serra, Joan
Venkataraman, Shankar
Stoica, Mihai
Kuehn, Uta
Roth, Stefan
Eckert, Jürgen
author_facet Torrens-Serra, Joan
Venkataraman, Shankar
Stoica, Mihai
Kuehn, Uta
Roth, Stefan
Eckert, Jürgen
author_sort Torrens-Serra, Joan
collection PubMed
description The non-isothermal transformation rate curves of metallic glasses are analyzed with the Master Curve method grounded in the Kolmogorov-Johnson-Mehl-Avrami theory. The method is applied to the study of two different metallic glasses determining the activation energy of the transformation and the experimental kinetic function that is analyzed using Avrami kinetics. The analysis of the crystallization of Cu(47)Ti(33)Zr(11)Ni(8)Si(1) metallic glassy powders gives E(a) = 3.8 eV, in good agreement with the calculation by other methods, and a transformation initiated by an accelerating nucleation and diffusion-controlled growth. The other studied alloy is a Nanoperm-type Fe(77)Nb(7)B(15)Cu(1) metallic glass with a primary crystallization of bcc-Fe. An activation energy of E(a) = 5.7 eV is obtained from the Master Curve analysis. It is shown that the use of Avrami kinetics is not able to explain the crystallization mechanisms in this alloy giving an Avrami exponent of n = 1.
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spelling pubmed-54488862017-07-28 Non-Isothermal Kinetic Analysis of the Crystallization of Metallic Glasses Using the Master Curve Method Torrens-Serra, Joan Venkataraman, Shankar Stoica, Mihai Kuehn, Uta Roth, Stefan Eckert, Jürgen Materials (Basel) Article The non-isothermal transformation rate curves of metallic glasses are analyzed with the Master Curve method grounded in the Kolmogorov-Johnson-Mehl-Avrami theory. The method is applied to the study of two different metallic glasses determining the activation energy of the transformation and the experimental kinetic function that is analyzed using Avrami kinetics. The analysis of the crystallization of Cu(47)Ti(33)Zr(11)Ni(8)Si(1) metallic glassy powders gives E(a) = 3.8 eV, in good agreement with the calculation by other methods, and a transformation initiated by an accelerating nucleation and diffusion-controlled growth. The other studied alloy is a Nanoperm-type Fe(77)Nb(7)B(15)Cu(1) metallic glass with a primary crystallization of bcc-Fe. An activation energy of E(a) = 5.7 eV is obtained from the Master Curve analysis. It is shown that the use of Avrami kinetics is not able to explain the crystallization mechanisms in this alloy giving an Avrami exponent of n = 1. MDPI 2011-12-20 /pmc/articles/PMC5448886/ /pubmed/28824135 http://dx.doi.org/10.3390/ma4122231 Text en © 2011 by the authors. licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Torrens-Serra, Joan
Venkataraman, Shankar
Stoica, Mihai
Kuehn, Uta
Roth, Stefan
Eckert, Jürgen
Non-Isothermal Kinetic Analysis of the Crystallization of Metallic Glasses Using the Master Curve Method
title Non-Isothermal Kinetic Analysis of the Crystallization of Metallic Glasses Using the Master Curve Method
title_full Non-Isothermal Kinetic Analysis of the Crystallization of Metallic Glasses Using the Master Curve Method
title_fullStr Non-Isothermal Kinetic Analysis of the Crystallization of Metallic Glasses Using the Master Curve Method
title_full_unstemmed Non-Isothermal Kinetic Analysis of the Crystallization of Metallic Glasses Using the Master Curve Method
title_short Non-Isothermal Kinetic Analysis of the Crystallization of Metallic Glasses Using the Master Curve Method
title_sort non-isothermal kinetic analysis of the crystallization of metallic glasses using the master curve method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5448886/
https://www.ncbi.nlm.nih.gov/pubmed/28824135
http://dx.doi.org/10.3390/ma4122231
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