Changes in the Structure and Properties of Fluorocarbon Coatings under Irradiation with Accelerated C 60 Ions

Pukha, V.; Kabachkov, E.; Nechaev, G.; Lukina, I.; Drozdova, E.; Chernogorova, O.

Авторы: Pukha Vladimir, Kabachkov Evgeny, Nechaev G., Lukina I., Drozdova Ekaterina, Chernogorova O.
Журнал: Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
Том: 19
Номер: 3
Год издания: 2025
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
DOI: 10.1134/S1027451025700855
Аннотация: —The first results of combined deposition of coatings from a beam of accelerated C60 fullerene ions and fluoroplastic vapor (polymerized tetrafluoroethylene, PTFE) are presented. The coatings were formed by condensation of thermally evaporated PTFE on a Si substrate in vacuum under irradiation with a C60 ion beam with an energy of 5 keV passed through a mass spectrometer. The calculated ratio of C60 ions and molecular fragments condensing on the substrate (–CF2–CF2–) was chosen close to 1 : 1. The structure and chemical bonds have been studied by Raman scattering and X-ray photoelectron spectroscopy, according to which the coating contains about 8.6 at % fluorine. The coating contains ~35% sp3 bonds, with a sp3 /sp2 ratio of ~0.76, and the main part (up to 50%) of fluorine–carbon bonds is concentrated in the form of polymer chains –CF2–CF2–, which are located in a solid carbon matrix; that is, the coating structure is a nanocomposite. Mechanical tests showed high hardness of the coating H ~ 32 GPa with an H/E ratio of ~0.16 (E is Young’s modulus). The coating is characterized by a high contact angle of wetting with distilled water (CA = 98°). Tribological tests showed a coefficient of friction close to 0.18, with low wear of less than 10–7 mm3 /(N m).
Добавил в систему: Кабачков Евгений Николаевич

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Changes in the Structure and Properties of Fluorocarbon Coatings under Irradiation with Accelerated C 60 Ionsстатья

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