Deposition of Wear-Resistant Nanocomposite Coatings from Accelerated C60 Ions.

Autor: Pukha, V. E., Drozdova, E. I., Chernogorova, O. P., Lukina, I. N., Petrzhik, M. I., Belmesov, A. A.
Zdroj: Journal of Surface Investigation: X-Ray, Synchrotron & Neutron Techniques; Jun2024, Vol. 18 Issue 3, p557-563, 7p
Abstrakt: From accelerated C60 ions at temperatures of 200 and 300°C hard wear-resistant carbon coatings were deposited. It has been established that the mechanical properties of the coatings are determined by the substrate temperature (Ts) and the energy composition of the beam. The hardness of coatings deposited from ions with an energy of 7 keV exceeds 50 GPa and is practically independent of Ts. The presence of and with an energy of ~14 and 21 keV, respectively, in the beam leads to a result that is not typical for carbon coatings—the hardness increases by more than 1.3 times with an increase in Ts from 200 to 300°C (from 31.6 to 41.6 GPa). In this case, according to Raman spectroscopy data, the size of graphite nanocrystals in the coating increases with temperature up to almost 2 nm. Coatings obtained under conditions of irradiation with and ions are characterized by minimal wear (1.5 × 10–8 mm3/(N m), Ts = 200°C) and minimal friction coefficient (μ = 0.05 for Ts = 300°C). We attribute the unusual dependence of hardness on Ts and the improvement in the tribological properties of coatings to the formation of a composite structure based on a diamond-like matrix and graphite nanocrystals in this Ts range. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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