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Phase-field modelling of spinodal decomposition in TiAlN including the effect of metal vacancies
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Physical Metallurgy.ORCID iD: 0000-0002-4521-6089
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
2015. Vol. 95, 42-45 p.
Keyword [en]
Phase-field model, Spinodal decomposition, Vacancies, TiAlN
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-158257DOI: 10.1016/j.scriptamat.2014.09.027ISI: 000345733700011Scopus ID: 2-s2.0-84923208051OAI: oai:DiVA.org:kth-158257DiVA: diva2:776227
Funder
Swedish Foundation for Strategic Research VinnovaSwedish Research Council
Note

QC 20150107

Available from: 2015-01-07 Created: 2015-01-07 Last updated: 2017-12-05Bibliographically approved

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