STRUCTURE, COMPOSITION AND MECHANICAL PROPERTIES OF MULTI-LAYER VACUUM-ARC NITRIDE COATINGS

Authors

DOI:

https://doi.org/10.20998/2078-7405.2022.97.02

Keywords:

vacuum-arc technology, multilayer nitride coatings, composition and mechanical properties of coatings, PVD coatings, PCBN cutting tool

Abstract

The conditions of application of multilayer vacuum-arc nitride coatings on a substrate made from polycrystalline cubic boron nitride (PCBN) are considered using the samples of (TiAlCrY)N/ZrN, (TiZr/TiSi)N, (TiAlSiY)N/CrN compositions. A schematic diagram of a vacuum-arc installation for applying similar coatings is presented, and the technological conditions of coating formation are considered. The structure and composition of the coatings were studied during diffractometric studies, and the performance of coated tools was examined when turning hardened steel. A large amount of the droplet phase in the (TiAlCrY)N/ZrN coating was established. The lattice parameters of two nitrides with an fcc crystal lattice were determined: ZrN – 4.590 Å, TiAlCrYN – 4.203 Å. CSR (coherent-scattering region) of the ZrN phase is 5.4 nm at the microstrain level ε = 4.7910-3. High homogeneity and low defects in the thickness of the (TiZr)N/(TiSi)N coating were established – the amount of droplet phase is insignificant. The CSR of the coating is 24.2 nm at the level of microstrain ε = 5.7610-3, and the predominant texture orientation is (111). A small amount of the droplet phase was found in the (TiAlCrY)N/CrN coating. Both coating layers are characterized by the formation of phases with a cubic (fcc) crystal lattice, and a strong (111) texture occurs. The crystallographic planes (111) of the phase grains are mainly oriented parallel to the coating interface. The size of the CSR is 14.6 nm. It is shown that multilayer vacuum-arc coatings lead to an increase in the tool life of PCBN cutting tools by reducing the effect of adhesive sticking of the processed material and reducing the intensity of chemical interaction in the cutting zone.

Author Biographies

Klymenko Serhiy, V. N. Bakul Institute for Superhard Materials of the NAS of Ukraine 2, Avtozavodska Str., Кyiv, 04074.

Senior Researcher, PhD in Technical Sciences, V. N. Bakul Institute for Superhard Materials of the NAS of Ukraine, 2, Avtozavodska Str., Кyiv, 04074.

Klymenko Sergiy, V. N. Bakul Institute for Superhard Materials of the NAS of Ukraine 2, Avtozavodska Str., Кyiv, 04074

Deputy Director of Science, Corresponding Member of NAS of Ukraine, Dr. in Technical Science, Professor, V.N. Bakul Institute for Superhard Materials of the NAS of Ukraine, 2, Avtozavodska Str., Кyiv, 04074

Manokhin Andriy, V. N. Bakul Institute for Superhard Materials of the NAS of Ukraine. 2, Avtozavodska Str., Кyiv, 04074

Senior Researcher, PhD in Technical Sciences, Senior Researcher. V. N. Bakul Institute for Superhard Materials of the NAS of Ukraine. 2, Avtozavodska Str., Кyiv, 04074

Stolbovoy Vyacheslav, Institute of Solid-state Physics, Materials Science and Technologies National Science Center Kharkіv Institute of Physics and Technology of the NAS of Ukraine 1, Academichna Str., Kharkіv, 61108

Senior Researcher, Dr. in Technical Science, Senior Researcher, Institute of Solid-state Physics, Materials Science and Technologies National Science Center Kharkіv Institute of Physics and Technology of the NAS of Ukraine 1, Academichna Str., Kharkіv, 61108

Beresvev Vyacheslav, V. N. Karazin Kharkiv National University. 6, Nezalezhnosti Ave., Kharkiv, 61000

Professor, Dr. in Technical Science, Professor. V. N. Karazin Kharkiv National University. 6, Nezalezhnosti Ave., Kharkiv, 61000

Šiška Fillip, Institute of Physics of Materials of the Czech Academy of Sciences. ŽIŽKOVA 513/22 616 00 Brno, Czech Republic

Researrcher of the Brittle fracture group, PhD. Institute of Physics of Materials of the Czech Academy of Sciences. ŽIŽKOVA 513/22 616 00 Brno, Czech Republic

Chlup Zdeněk, Institute of Physics of Materials of the Czech Academy of Sciences. Žižkova 513/22 616 00 Brno, Czech Republic

Leader of the Brittle fracture group, PhD. Institute of Physics of Materials of the Czech Academy of Sciences. Žižkova 513/22 616 00 Brno, Czech Republic

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Published

2022-11-04

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Section

The ability to use tools from new materials