Issues »  Volume 36, Issue 1

Influence of Composition of Quasi-Binary Section of Ti—W—C System on Phase Formation, Structure, and Substructure of the Ion—Plasma Nanostructured Coatings Fabricated on Its Base

O. V. Sobol’$^{1}$, O. A. Shovkoplyas$^{2}$

$^{1}$National Technical University ‘Kharkiv Polytechnic Institute’, 21 Frunze Str., 61002 Kharkiv, Ukraine
$^{2}$Sumy State University, 2 Rymskogo-Korsakova Str., 40000 Sumy, Ukraine

Received: 23.10.2013. Download: PDF

Regularities of phase composition, structure, and substructure in coatings of quasi-binary Ti—W—C system fabricated in non-equilibrium conditions from ion and plasma flows are studied. As shown, if phases with different warmth of formation (TiC with rather high warmth of formation 183.8 kJ/mol and WC with rather low warmth of formation of 37.7 kJ/mol) are used as components of quasi-binary system, then it makes possible to change phase structure from monocarbide stable to high temperatures to a multiphase state, which consists of phases of the lowest carbides. The increase of substrate temperature during deposition leads to the anisotropic growth of crystallites with prior growth along the direction of particles falling. With increase of TiC content with high binding energy, the average size of crystallites increases. At the same time, the high WC content allows to transfer a structural condition of a material to a nanolevel with a size of crystallites of 4—20 nanometers.

Key words: ion-plasma coatings, nanocrystalline materials, X-ray analysis, qvasi-binary section, Ti—W—C system, metastable phases, texture.

URL: http://mfint.imp.kiev.ua/en/abstract/v36/i01/0049.html

DOI: https://doi.org/10.15407/mfint.36.01.0049

PACS: 61.05.cp, 64.60.My, 64.70.Nd, 68.55.jm, 81.07.Bc, 81.15.Cd

Citation: O. V. Sobol’ and O. A. Shovkoplyas, Influence of Composition of Quasi-Binary Section of Ti—W—C System on Phase Formation, Structure, and Substructure of the Ion—Plasma Nanostructured Coatings Fabricated on Its Base, Metallofiz. Noveishie Tekhnol., 36, No. 1: 49—62 (2014) (in Russian)

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