Specific Features of the Microstructure and Properties of Multielement Nitride Coatings Based on TiZrNbAlYCr

Multicomponent nanostructured coatings based on (TiZrNbAlYCr)N with a hardness as high as 47 GPa were obtained by cathodic arc deposition. The effect of partial nitrogen pressure P N (with constant bias potential U b =–200 V applied to the substrate) on the phase-composition variation, the size of c...

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Bibliographic Details
Published in:Technical physics letters 2018-02, Vol.44 (2), p.98-101
Main Authors: Pogrebnjak, A. D., Beresnev, V. M., Bondar, O. V., Kravchenko, Ya. O., Zhollybekov, B., Kupchishin, A. I.
Format: Article
Language:English
Subjects:
ALUMINIUM NITRIDES
Arc deposition
BCC LATTICES
Body centered cubic lattice
CHROMIUM NITRIDES
Classical and Continuum Physics
COATINGS
Crystallites
DEPOSITION
Face centered cubic lattice
FCC LATTICES
HARDNESS
Lattices
MICROSTRUCTURE
NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
NIOBIUM NITRIDES
Nitrogen
Physics
Physics and Astronomy
Pressure effects
PRESSURE RANGE GIGA PA
SUBSTRATES
TITANIUM NITRIDES
YTTRIUM NITRIDES
ZIRCONIUM NITRIDES
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Summary:Multicomponent nanostructured coatings based on (TiZrNbAlYCr)N with a hardness as high as 47 GPa were obtained by cathodic arc deposition. The effect of partial nitrogen pressure P N (with constant bias potential U b =–200 V applied to the substrate) on the phase-composition variation, the size of crystallites, and their relation to the microstructure and hardness was investigated. An increase in the nitrogen pressure resulted in the formation of two phases with characteristic BCC (the lattice period is 0.342 nm) and FCC lattices with averaged nanocrystallite sizes of 15 and 2 nm. At a high pressure of 0.5 Pa, crystallites in the FCC phase with a lattice period of 0.437 nm grew in size to ~7 nm. The hardness of deposited coatings with larger (3.5 nm) FCC-phase crystallites and smaller (7 nm) BCC-phase crystallites was enhanced considerably.
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785018020098