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Phase-field modelling of spinodal decomposition in TiAlN including the effect of metal vacancies
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, The Institute of Technology.
Royal Institute Technology, Sweden.
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-2286-5588
2015 (English)In: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 95, 42-45 p.Article in journal (Refereed) Published
Abstract [en]

Using a CALPHAD approach together with a Cahn-Hilliard model, we describe the microstructure evolution in cubic Ti1-xAlxN including vacancies on the metal sublattice. Our results show that vacancy content has a pronounced effect on the decomposition kinetics. Furthermore, vacancies show a strong tendency to segregate to the coherent AlN-TiN interface regions. We illustrate how vacancies anneal to grain boundaries, and finally, we compare our prediction to experimental differential scanning calorimetry data and attribute the second peak in the thermogram to vacancy depletion.

Place, publisher, year, edition, pages
Elsevier , 2015. Vol. 95, 42-45 p.
Keyword [en]
Phase-field model; Spinodal decomposition; Vacancies; TiAlN
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-113155DOI: 10.1016/j.scriptamat.2014.09.027ISI: 000345733700011OAI: oai:DiVA.org:liu-113155DiVA: diva2:780388
Note

; Swedish Research Council

Available from: 2015-01-14 Created: 2015-01-12 Last updated: 2017-12-05

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Asp Grönhagen, KlaraOdén, Magnus

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