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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/Al2O3. 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 H2SO4 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 mu m.

Multilayered Nano-Microcomposite Ti-Al-N/TiN/Al2O3Coatings. Their Structure and Properties

Multilayered Nano-Microcomposite Ti-Al-N/TiN/Al₂O₃Coatings. Their Structure and Properties