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Title Nb–Al–N thin films: Structural transition from nanocrystalline solid solution nc-(Nb,Al)N into nanocomposite nc-(Nb, Al)N/a–AlN
Authors Ivashchenko, V.I.
Dub, S.N.
Scrynskii, P.L.
Pohrebniak, Oleksandr Dmytrovych  
Sobol, O.V
Tolmacheva, G.N.
Rohoz, Vladyslav Mykolaiovych  
Sinel’chenko, A.K.
Keywords Nb–Al–N
Xray structure analysis,
thin films
nanoindentation
firstprinciples calculation
Type Article
Date of Issue 2016
URI http://essuir.sumdu.edu.ua/handle/123456789/46992
Publisher Allerton Press, Inc.,
License
Citation Nb–Al–N thin films: Structural transition from nanocrystalline solid solution nc-(Nb,Al)N into nanocomposite nc-(Nb, Al)N/a–AlN [Текст] / V.І. Ivashchenko, S.N. Dub, P.L. Scrynskii [та ін.] // Journal of Superhard Material. — 2016. — №38(2). — С. 103-113
Abstract Structures and mechanical properties of thin films of the Nb–Al–N system produced by magnetron sputtering of targets from niobium and aluminum in the Ar–N2 atmosphere have been studied. It has been shown that as the aluminum concentration increases, the structure of a thin film transforms from the nanocrystalline into the nanocomposite one, which consists of nanocrystallites of solid solutions in a matrix of amorphous aluminum nitride. Hardness, elastic modulus, and yield strength of Nb–Al–N thin films have been studied by nanoindentation in the mode of continuous control of the contact stiffness. It has been found that the transition of the structures of Nb–Al–N thin films from the nanocrystalline to the nanocomposite structures results in an increase of hardness and decrease of elastic modulus due to the for mation of a thin amorphous interlayer between grains of nanocrystallites. A high hardness to elastic modulus ratio of Nb–Al–N nanocomposite thin films indicates that the films are a promising material for wear resistant coatings. D
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