Abrasive and Erosive Wear of TI6Al4V Alloy with Electrospark Deposited Coatings of Multicomponent Hard Alloys Materials Based of WC and TiB2

In the present work, abrasive and erosive wear of wear-resistant composite coatings with a complex structure and different phase compositions deposited on titanium surfaces was studied. The coatings were obtained by electrospark deposition (ESD) using two types of hard-alloy compositions: WC–TiB2–B4...

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Bibliographic Details
Published in:Coatings (Basel) 2023-01, Vol.13 (1), p.215
Main Authors: Penyashki, Todor, Kostadinov, Georgi, Kandeva, Mara, Kamburov, Valentin, Nikolov, Antonio, Dimitrova, Rayna
Format: Article
Language:English
Subjects:
Abrasive erosion
Abrasive wear
Boron carbide
Chromium
Coefficient of friction
Electrodes
Friction
Intermetallic compounds
Microhardness
Microscopy
Nanoparticles
Niobium carbide
Phase composition
Process parameters
Protective coatings
Roughness
Silicon
Thickness
Titanium alloys
Titanium base alloys
Titanium diboride
Topography
Tungsten carbide
Wear resistance
Zirconium dioxide
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Summary:In the present work, abrasive and erosive wear of wear-resistant composite coatings with a complex structure and different phase compositions deposited on titanium surfaces was studied. The coatings were obtained by electrospark deposition (ESD) using two types of hard-alloy compositions: WC–TiB2–B4C–Co–Ni–Cr–Si–B and TiB2–TiAl reinforced with dispersed nanoparticles of ZrO2 and NbC. The influence of the ESD process parameters on the roughness, thickness, composition, structure and coefficient of friction of the coated surfaces was investigated, and their role in protecting the titanium surfaces from wear was clarified. Dense coatings with the presence of newly formed wear-resistant phases and crystalline-amorphous structures were obtained, with roughness, thickness and microhardness that can be varied by the ESD modes in the range Ra = 2.5 ÷ 4.5 µm, δ = 8 ÷ 30 µm and HV 8.5 ÷ 14.0 GPa. The new coatings were found to reduce the abrasive and erosive wear of the coated surfaces by up to four times. The influence of the geometric characteristics, composition and structure of coatings on the wear intensity and wear resistance of coatings was studied.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings13010215