Perez, Michel and Courtois, Eglantine and Acevedo, Daniel and Epicier, Thierry and Maugis, Philippe Precipitation of niobium carbonitrides in ferrite: chemical composition measurements and thermodynamic modelling. (2007) Philosophical Magazine Letters , 87 (9). 645-656. ISSN 0950-0839
|
(Document in English)
PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 463kB |
Official URL: http://dx.doi.org/10.1080/09500830701427003
Abstract
High-resolution transmission electron microscopy and electron-energy loss spectroscopy have been used to characterize the structure and chemical composition of niobium carbonitrides in the ferrite of a Fe–Nb–C–N model alloy at different precipitation stages. Experiments seem to indicate the coexistence of two types of precipitates: pure niobium nitrides and mixed substoichiometric niobium carbonitrides. In order to understand the chemical composition of these precipitates, a thermodynamic formalism has been developed to evaluate the nucleation and growth rates (classical nucleation theory) and the chemical composition of nuclei and existing precipitates. A model based on the numerical solution of thermodynamic and kinetic equations is used to compute the evolution of the precipitate size distribution at a given temperature. The predicted compositions are in very good agreement with experimental results.
Item Type: | Article |
---|---|
Additional Information: | Thanks to Taylor & Francis editor. The definitive version is available at http://www.informaworld.com/ The original PDF of the article can be found at Philosophical Magazine Letters website : http://www.tandf.co.uk/journals/titles/09500839.asp |
Audience (journal): | International peer-reviewed journal |
Uncontrolled Keywords: | |
Institution: | Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE) Other partners > Arcelor Mittal Research (FRANCE) Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE) Other partners > Institut National des Sciences Appliquées de Lyon - INSA (FRANCE) French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE) |
Laboratory name: | |
Statistics: | download |
Deposited On: | 16 Oct 2009 07:37 |
Repository Staff Only: item control page