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

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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

2011

vol. 120

issue 1

100-104

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.

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

100%

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

2011

vol. 120

issue 1

94-99

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.

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2 Acta Physica Polonica A

2 2011

2 Beresnev V.

2 Il'yashenko M.

2 Komarov F.

2 Makhmudov N.

2 Pogrebnjak A.

2 Shpak A.

2 Shypylenko A.

1 Baidak V.

1 Dem'yanenko A.

1 Erdybaeva N.

1 Kaverin M.

1 Kaverina A.

1 Kirik G.

1 Kolesnikov D.

1 Kolisnichenko O.

1 Kunitskii Y.

1 Kunitskyi Y.

1 Ruzimov S.

1 Zukovski P.

1 Zukowski P.

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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