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Belous V.,National Science Center Kharkov Institute of Physics and Technology | Vasyliev V.,National Science Center Kharkov Institute of Physics and Technology | Luchaninov A.,National Science Center Kharkov Institute of Physics and Technology | Marinin V.,National Science Center Kharkov Institute of Physics and Technology | And 4 more authors.
Surface and Coatings Technology | Year: 2013

In the present work we examined the cavitation and abrasion resistance of PIII&D Ti-Al-Y-N coatings with Y content ≤1at.% and analyzed the influence of mechanical properties and structure of the coatings on their wear resistance. The coatings with thickness of 5-6μm were deposited on the polished stainless steel (type-302) substrates by filtered vacuum-arc evaporation technique. The substrate potential was either DC with a constant voltage of -150V or pulsed DC with an amplitude AU in the range of 0-2.5kV. The cavitation treatment of the coating deposited at the DC potential resulted in long cracks on their surface. The coating deposited at AU=0 was subjected to pitting erosion. The high voltage pulsed substrate potential contributed to the decrease in the rate of mass loss under cavitation, at the same time the quantity of erosion defects on the treated surface was strongly diminished. The increase of Y content resulted in improvement of wear durability. Average rates of cavitation and abrasion wear of (Ti,Al)N+1at.%Y were a factor of 3 to 5 times lower than that of (Ti,Al)N and tenfold lower than that of TiN. Formation of a dense nanostructure with fine grains and non-evident (inapparent) columnar morphology, significant reduction in the surface roughness and decrease in the internal stress level are the reasons for the improved wear resistance. © 2013.


Belous V.A.,National Science Center Kharkov Institute of Physics and Technology | Vasyliev V.V.,National Science Center Kharkov Institute of Physics and Technology | Goltvyanytsya V.S.,Real Ltd. | Goltvyanytsya S.K.,Real Ltd. | And 5 more authors.
Surface and Coatings Technology | Year: 2011

Ti0.5Al0.5N coatings with a small amount of Y (up to 1at.%) were deposited by filtered vacuum arc plasma at pulsed high voltage negative substrate bias potential with amplitude up to 2.5kV and their microstructure was studied. X-ray fluorescence analysis showed that this deposition method allows ensuring well the conformity of the elemental composition of the metallic components of cathodes and films. X-ray diffraction measurements of the films with yttrium revealed a solid solution (Ti,Al)N phase with a cubic NaCl-type structure as the only crystalline phase. The films deposited with an amplitude of the substrate bias potential in the range of 1-1.5kV were characterized by a strong axial texture [110]. In these films an increase of the yttrium content leads to the reduction of the nitride lattice parameter and growth of coherent scattering zone dimension as well as to a decrease of the surface roughness. Coatings containing 1at.% Y exhibited high hardness of 32-36GPa and oxidation resistance. © 2011 Elsevier B.V.


Vasyliev V.V.,National Science Center Kharkov Institute of Physics and Technology | Goltvyanytsya V.S.,Real Ltd | Goltvyanytsya S.K.,Real Ltd | Luchaninov A.A.,National Science Center Kharkov Institute of Physics and Technology | And 4 more authors.
Problems of Atomic Science and Technology | Year: 2015

The multicomponent nitride coatings based on TiN and (Ti, Al)N with small additions of Y, Re, Ni, Cr, Si, Mo, Fe synthesized by the PIII&D method from the filtered cathodic-arc plasma. The crystalline nitride phase in all coatings is of the cubic structure of NaCl type. All investigated coatings were characterized with the hardness of 23…36 GPa and Young's modulus of 324…436 GPa. The addition of dopants reduces the average rate of cavitation and abrasive wear of the coatings. The best durability demonstrated coating deposited from the cathode of the Ti0.49Al0.50Y0.006Re0.0005 composition. This coating also demonstrated high thermal stability. © 2015, National Science Center, Kharkov Institute of Physics and Technology. All rights reserved.


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Real LLC | Date: 2016-11-22

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