Phase-field modelling of spinodal decomposition in TiAlN including the effect of metal vacancies
2015 (English)In: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 95, 42-45 p.Article in journal (Refereed) Published
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.
Phase-field model, Spinodal decomposition, Vacancies, TiAlN
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-158257DOI: 10.1016/j.scriptamat.2014.09.027ISI: 000345733700011ScopusID: 2-s2.0-84923208051OAI: oai:DiVA.org:kth-158257DiVA: diva2:776227
FunderSwedish Foundation for Strategic Research VinnovaSwedish Research Council
QC 201501072015-01-072015-01-072015-01-07Bibliographically approved