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Registration Number

0219U100198, 0118U100311 , R & D reports

Title

"Process optimization of technological parameters influence on the methods of applying nanostructured nitride coatings"

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Head

Andreev Anatolii O., Доктор технічних наук

Registration Date

30-01-2019

Organization

National Science Center "Kharkiv Institute of Physics and Technology"

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The objects of study are multicomponent and multilayer nanostructured coatings. The purpose of the work is to obtain wear-resistant nanostructured nitride vacuum-arc coatings. Research and search for links between the technological parameters of the processes of obtaining nanostructured nitride coatings and their physico-mechanical properties, structural state and the results of mechanical tests. Research methods - measurement of hardness, determination of the level of elasticity and yield boundary by the method of indentation, determination of friction coefficients, X-ray diffraction studies, electron microscopy, mechanical studies during turning. Important characteristics of coatings are high thermal stability of physicomechanical properties and high temperature resistance to oxidation, which substantially depends on its phase composition and thermal stability of individual phases or layers. Silicon is slightly soluble in transition metal nitride systems, and silicon saturated systems, as a rule, produce compositions with high hardness. The TiAlSiN system is one of the most promising. The use of Al in these coatings provides their increased oxidation stability, thermal stability and high performance. Adding yttrium to the coating provides an increase in its resistance to oxidation due to the formation of the YOx phase at the grain boundary, which leads to grain dispersion and inhibition of the formation of the columnar structure of condensates, which is significant from the point of view of increasing resistance to wear in an oxidizing environment. It is shown that the formation of vacuum-arc nanostructured coatings TiAlSiYN affects the bias potential. At an optimum value of -200 V, a texture is formed with the [111] axis perpendicular to the growth plane; the coating has a high hardness of 49.5 GPa and is resistant to wear.

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2020-04-02