Multilayer Design of CrN/MoN Superhard Protective Coatings and Their Characterisation

  • B. O. PostolnyiEmail author
  • O. V. Bondar
  • K. Zaleski
  • E. Coy
  • S. Jurga
  • L. Rebouta
  • J. P. Araujo
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)


Multilayer CrN/MoN transition metal nitride coatings were studied in this research. Films were deposited by vacuum arc deposition (Arc-PVD) from Cr and Mo cathodes in nitrogen atmosphere pN = 0.4 Pa. Three series of samples with different values of negative bias voltage (−20, −150, and −300 V) applied to the surface were fabricated. Each series has samples with 11, 22, 44, 88, 180 and 354 layers while total thickness was maintained with the same value. Samples were studied by scanning electron microscopy (SEM) on cross-sections and coatings surface, energy-dispersive X-ray spectroscopy (EDS), electron backscatter diffraction (EBSD), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), micro-indentation. Two main cubic phases of γ-Mo2N and cubic CrN were detected. It was observed that the crystal growth orientation changes while the negative bias voltage of the substrate decreases. The maximum values of hardness (38–42 GPa) among the studied samples were obtained for coatings with a minimal individual layer thickness of 20 nm deposited at Ub = −20 V.


Multilayers Microstructure Diffraction Hardness Coatings 



This work was partly financed by the Foundation of Science and Technology (FCT) of Portugal [references NORTE-01-0145-FEDER-022096, SFRH/BD/129614/2017], Network of Extreme Conditions Laboratories (NECL) and by Ukrainian state budget programs [No. 0116U006816, 0118U003579 and 0116U002621]. Partial support by COST Action CA15102 is also greatly appreciated. The authors are very thankful to Prof. Alexander Pogrebnjak from Sumy State University and Prof. Vyacheslav Beresnev from V. N. Karazin National University in Ukraine for their support and help.


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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • B. O. Postolnyi
    • 1
    • 2
    Email author
  • O. V. Bondar
    • 1
  • K. Zaleski
    • 3
  • E. Coy
    • 3
  • S. Jurga
    • 3
  • L. Rebouta
    • 4
  • J. P. Araujo
    • 2
  1. 1.Sumy State UniversitySumyUkraine
  2. 2.IFIMUP-IN, Department of Physics and AstronomyFaculty of Sciences, University of PortoPortoPortugal
  3. 3.NanoBioMedical Centre, Adam Mickiewicz UniversityPoznańPoland
  4. 4.Centre of Physics, University of MinhoGuimarãesPortugal

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