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Title Nanocomposite Nb-Al-N coatings: Experimental and theoretical principles of phase transformations
Authors Pohrebniak, Oleksandr Dmytrovych  
Rohoz, Vladyslav Mykolaiovych  
Bondar, Oleksandr Viacheslavovych  
Ivashchenko, V.I.
Shevchenko, V.
Jurga, S.
Coy, E.
Keywords Nanocomposites
Metals and alloys
Mechanical properties
Computational modeling
Microstructure
C-PVD
Type Article
Date of Issue 2017
URI http://essuir.sumdu.edu.ua/handle/123456789/64239
Publisher Elsevier
License
Citation Nanocomposite Nb-Al-N coatings: Experimental and theoretical principles of phase transformations [Text] / A. Pogrebnjak, V. Rogoz, V. Ivashchenko [et al.] // Journal of Alloys and Compounds. - 2017. - №718. - С. 260-269. - DOI: 10.1016/j.jallcom.2017.05.136
Abstract Phase transformations of Al doped NbN nanocomposite coatings are studied in detail focusing on their microstructural evolution and phase composition. Several techniques such as XRD, SEM, HR-TEM, Nanoindentation and molecular dynamics simulation are employed in order to understand the phase evolution of the Nb-Al-N system. The nanocomposite structures were formed in the coatings, the roughness of the coatings decreased with increasing the Al concentration due to decreasing grain size. First-principles investigation of Nb-Al-N solid solutions was carried out to interpret film properties. It was found, that for small Al fractions, the solid solutions will form in agreement with our experimental results. The spinodal decomposition of Nb-Al-N solid solutions is supposed to be responsible for the formation of the nanocomosite structure observed in the deposited Nb-Al-N films.
Appears in Collections: Наукові видання (ЕлІТ)

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