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1

Effect of Thermal Treatment on the Structure and Mechanical Properties of Coatings Based on (Ti, Hf, Nb, Si)N

100%

Pogrebnjak A., Komarov F., Sobol O., Kaverina A., Shypylenko A., Karwat C.

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vol. 125

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issue 6

1312-1316

EN

Current paper presents the results of investigating of nanostructured cathode arc vacuum evaporation coatings, based on (Ti, Hf, Nb, Si)N. Several methods of the structural and elemental analysis were used: proton microbeam, nano- and micro-electron beam, X-ray diffraction analysis. To determine tribological properties (scratch resistance, adhesive and cohesive strength) of the coatings, scratch testing were conducting. Influence of thermal annealing at temperatures 300, 500, 800, 1000C on elemental composition, microstructure, residual stress, phase composition, profiles of atomic distribution in the coatings were investigated.

2

Effect of Cu Negative Ion Implantation on Physical Properties of Zn_{1-x}Mn_xTe Films

84%

Pogrebnjak A., Shypylenko A., Amekura H., Takeda Y., Opanasyuk A., Kurbatov D., Kolotova I., Klymov O., Kozak C.

Acta Physica Polonica A

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2013

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vol. 123

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issue 5

939-942

EN

The paper deals with the investigations of structural properties of Zn_{1-x}Mn_xTe films, which were fabricated under various deposition conditions using the thermal evaporation method in a closed volume. The surface morphology of the samples was studied, the phase analysis of their structures was performed, the elemental analysis of the films and the crystal lattice constant were investigated. The texture perfection of the films before and after copper ion implantation was evaluated.

3

Formation of Multilayered Ti-Hf-Si-N/NbN/Al_2O_3 Coatings with High Physical and Mechanical Properties

84%

Pogrebnjak A., Prozorova M., Kovalyova M., Kolisnichenko O., Beresnev V., Oyoshi K., Takeda Y., Kaverina A., Shypylenko A., Partyka J.

Acta Physica Polonica A

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2013

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vol. 123

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issue 5

813-815

EN

This work presents the first results on forming of multi-layered superhard coatings Ti-Hf-Si-N/NbN/Al_2O_3 and their properties as well as structure. Microstructure, elemental and phase compositions of multi-layered coatings obtained by different methods were investigated. There were used such methods as: scanning electron microscopy EDS JEM-7000F microscope (with microanalysis) for research of cross-section of coatings, with subsequent Auger-electron spectroscopy, X-ray diffraction analysis, optical inverted microscope Olympus GX51, electron-ion microscopes Quanta 200 3D and Quanta 600 (scanning electron microscopy), equipped by the detector of X-ray radiation of the system PEGASUS 2000. It was stated that hardness of coatings has reached 56 GPa, and at the same time the factor of wearing during friction was the smallest - 2.571×10^{-5}. It was also noted that nitrogen pressure in the chamber at the deposition of the top layer significantly influences on the properties of samples. For example, the coefficient of friction at P=0.3 Pa from 0.2 at the beginning of track to 0.001 (during the tests), and at the pressure of nitrogen P=0.8 Pa, the coefficient of friction was equal to 0.314 at the beginning of track and 0.384 at the end (during the tests).

4

Fabrication and Research of Superhard (Zr-Ti-Cr-Nb)N Coatings

84%

Bondar O., Postolnyi B., Kravchenko Y., Shypylenko A., Sobol O., Beresnev V., Kuzmenko A., Zukowski P.

Acta Physica Polonica A

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2015

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vol. 128

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issue 5

867-870

EN

This work presents the results of (Zr-Ti-Cr-Nb)N superhard coatings research. The samples were fabricated by the vacuum-arc deposition method (Arc-PVD). Structure, composition and properties of these coatings were studied. The study of coatings was carried out using scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. Hardness measurements and adhesion tests were performed. The coatings thickness was up to 6.2 μ m, nanocrystallites sizes ranged from 4 to 7.3 nm. Values of hardness and cohesive strength were H=43.7 GPa and L_{C}=62.06 N, respectively. The optimal conditions for coating deposition were found.

5

Structure and Properties of Nano- and Microcomposite Coating Based on Ti-Si-N/WC-Co-Cr

68%

Pogrebnjak A., Shpak A., Beresnev V., Il'yashenko M., Komarov F., Shypylenko A., Kaverin M., Zukovski P., Kunitskyi Y., Kolesnikov D., Kolisnichenko O., Makhmudov N.

Acta Physica Polonica A

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2011

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vol. 120

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issue 1

100-104

EN

Using the two technologies: plasma-detonation and vacuum-arc deposition, we fabricated two types of coatings: Ti-Si-N/WC-Co-Cr/steel and Ti-Si-N/steel. We found that the top coating of Ti-Si-N was nanostructured one with 12 to 15 nm grain sizes and H = 40 to 38 GPa hardness. A thick coating which was deposited using the pulsed plasma jet, demonstrated 11 to 15.3 GPa hardness, an elastic modulus (E) changing within 176 to 240 GPa, and tungsten carbide grain dimensions varying from 150 to 350 nm to several microns. An X-ray diffraction analysis shows that the coating has the following phase composition: TiN, (Ti,Si)N solid solution, WC, W_2C tungsten carbides. An element analysis was performed using energy dispersive spectroscopy (microanalysis) and scanning electron microscopy, as well as the Rutherford backscattering of ^4He^{+} ion and the Auger electron spectroscopy. Surface morphology and structure were analyzed using scanning electron microscopy and scanning tunnel microscopy. Tests friction and resistance (cylinder-plane) demonstrated essential resistance to abrasive wear and corrosion in the solution. The decrease of grain dimensions ≤ 10 nm occurring in the top Ti-Si-N coating layer increased the sample hardness to 42 ± 2.7 GPa under Ti_{72}-Si_8-N_{20} at.% concentration.

6

Multilayered Nano-Microcomposite Ti-Al-N/TiN/Al_2O_3 Coatings. Their Structure and Properties

68%

Pogrebnjak A., Shpak A., Kirik G., Erdybaeva N., Il'yashenko M., Dem'yanenko A., Kunitskii Y., Kaverina A., Baidak V., Makhmudov N., Zukowski P., Komarov F., Beresnev V., Ruzimov S., Shypylenko A.

Acta Physica Polonica A

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2011

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vol. 120

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issue 1

94-99

EN

This paper presents the first results on formation and study of structure and properties of micro- and nanocomposite combined coatings. By means of modeling the deposition processes (deposition conditions, current density-discharge, plasma composition and density, voltage) we formed the three-layer nanocomposite coatings of Ti-Al-N/Ti-N/Al_2O_3. The coating composition, structure and properties were studied using physical and nuclear-physical methods. The Rutherford proton and helium ion backscattering, scanning electron microscopy with microanalysis, grazing incidence X-ray diffraction, as well as nanohardness tests (hardness) were used. Measurements of wear resistance and corrosion resistance in NaCl, HCl and H_2SO_4 solutions were also performed. For testing mechanical properties such characteristics of layered structures as hardness H, elastic modulus E: H^3/E^2 etc. were measured. It is demonstrated that the formed three-layer nanocomposite coatings have hardness of 32 to 36 GPa and elastic modulus of 328 ± 18 to 364 ± 14 GPa. Its wear resistance (cylinder-surface friction) increased by factor of 17 to 25 in comparison with the substrate (stainless steel). The layers thickness was in the range of 56-120 μm.

Refine search results

Effect of Thermal Treatment on the Structure and Mechanical Properties of Coatings Based on (Ti, Hf, Nb, Si)N

Effect of Cu Negative Ion Implantation on Physical Properties of Zn_{1-x}Mn_xTe Films

Formation of Multilayered Ti-Hf-Si-N/NbN/Al_2O_3 Coatings with High Physical and Mechanical Properties

Fabrication and Research of Superhard (Zr-Ti-Cr-Nb)N Coatings

Structure and Properties of Nano- and Microcomposite Coating Based on Ti-Si-N/WC-Co-Cr

Multilayered Nano-Microcomposite Ti-Al-N/TiN/Al_2O_3 Coatings. Their Structure and Properties