Investigation of Multilayer Superhard Ti-Hf-Si-N/NbN/Al2O3 Coatings for High Performance Protection

A. D. Pogrebnjak*, A. S. Kaverina, V. M. Beresnev, Y. Takeda, K. Oyoshi, H. Murakami, A. P. Shypylenko, M. G. Kovaleva, M. S. Prozorova, O. V. Kolisnichenko, B. Zholybekov, D. A. Kolesnikov

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter


This paper presents a new type of multi-layer (multicomponent) nano- and microstructured coatings Ti-Hf-Si-N/NbN/Al2O3 with thickness up to 200 m. It demonstrates high physicalmechanical and tribological properties. It was found that the investigated coatings, along with high hardness from 47 to 56 GPa and modulus of elasticity from 435 to 570 GPa, the plasticity index 0.08-0.11, have a fairly low coefficient of friction, which varies from 0.02 to 0.001 for a given mode of deposition. It is also shown that these multilayered coatings have high thermal stability (above 1000°C). The annealing temperature up to 1070°C in a vacuum about 10-2 Pa showed that the coating in the upper layers consisting of Ti-Hf-Si-N/NbN the size of nanograins increases from 25 to 56 nm (for the Ti-Hf-Si-N) and from 14-15 to 35-37 nm for NbN. The increase of steel microhardness at the "coating-substrate" interface, is due to the presence of the hardening near the border with coating formed as a result of impact during abrasive blasting and deposition of coating.

Original languageEnglish
Title of host publicationAdvanced Processing and Manufacturing Technologies for Nanostructured and Multifunctional Materials
Number of pages9
ISBN (Electronic)9781119040354
ISBN (Print)9781119040262
Publication statusPublished - 2015 Feb 10
Externally publishedYes


  • Annealing temperature
  • High-performance coating
  • Micro-cracks
  • Microstructured coating
  • Nanohardness
  • Nanostructured coating

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)


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