Obrabotka Metallov 2020 Vol. 22 No. 4

OBRABOTKAMETALLOV Vol. 22 No. 4 2020 148 MATERIAL SCIENCE Multiphase Cu-Ti Coatings coated by Plasma Vacuum-Arc deposition on Cu-Be Alloy С 17200 Alexander Kolubaev 1, а , * , Olga Sizova 1, b , Yuliya Denisova 1, 2, c , Andrey Leonov 2, d , Natalya Teryukalova 1, e , Aleksey Byeli 3, f 1 Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, 2/4 pr. Akademicheskii, Tomsk, 634055, Russian Federation 2 Institute of High Current Electronics of Siberian Branch of Russian Academy of Sciences, 2/3, pr. Akademicheskii, Tomsk, 634055, Russian Federation 3 Belarusian National Technical University, 65, Nezavisimosty Ave., Minsk, 220013, Republic of Belarus а https://orcid.org/0000-0002-2839-5249, kav@ispms.tsc.ru , b https://orcid.org/0000-0001-9177-6602, ovs@ispms.tsc.ru, c https://orcid.org/0000-0002-3069-1434, yudenisova81@yandex.ru , d https://orcid.org/0000-0001-6645-3879, laa@tpu.ru , e https://orcid.org/0000-0001-6547-7676, natali.t.v@ispms.tsc.ru , f http://orcid.org/0000-0002-2207-3169, vmo@tut.by Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2020 vol. 22 no. 4 pp. 137–150 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2020-22.4-137-150 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 03 September 2020 Revised: 18 September 2020 Accepted: 28 September 2020 Available online: 15 December 2020 Keywords : Ion-plasma coatings Copper-beryllium alloy X-ray diffraction Cu-Ti Phases Sliding friction Wear Funding This work was fi nancially supported by Russian Foundation for Basic Research (project № 20-58-00048 Bel_ а ). Acknowledgements The authors wish to thank V.V. De- nisov and A.V. Filippov for his help in conducting the experiment. ABSTRACT Introduction . Deposition of hard intermetallic coatings is an ef fi cient technology to improve operating characteristics of Cu-Be alloys. PVD of coatings is widely used for surface engineering of constructive materials, deposition of wear and corrosion resistant surface layers. Multiphase and multicomponent coatings are considered as the most ef fi cient hard coatings for surface engineering. In this research, Ti-Cu coatings are deposited by a vacuum-arc plasma-assisted method on hardened BrB 2 bronze (alloy C17200) at a temperature of 320 – 330 o C. Processing resulted in ageing of Cu-Be alloy and surface hardening of material. The aim of the research is to analyze the microstructure, phase composition, and tribological properties of Cu-Be alloys modi fi ed with plasma-activated PVD coatings based on titanium, with the subsequent development of an effective technology for surface engineering and improvement of the mechanical properties of Cu-Be alloys. Results and discussion. Plasma-assisted PVD of Cu-Ti coatings on the surface of tempered C17200 alloy at 320 – 330 o C resulted in formation of multiphase coatings, consisting of Cu, Ti, CuTi and CuTi 2 components. X-ray analysis revealed development of ageing process in Cu-Be alloy which resulted in formation of CuBe inclusions. Wear resistance of modi fi ed blocks is investigated. The main mechanism of modi fi ed blocks wearing is cracking of the coating with further formation of fi ne debris of base Cu-Be material. Wear debris is signi fi cantly smaller then debris of С 17200 alloy without coating. Surface microhardness of blocks processed at 320 –330 o C is comparatively high (540 HV 0.02 - 530 HV 0.02 ). Wear resistance of blocks subjected to surface engineering is comparatively low probably because of small thickness of the coating (< 8 μ m) and insuf fi cient hardness of matrix material. For citation: Kolubaev A.V., Sizova O.V., Denisova Yu.A, Leonov A.A., Teryukalova N.V., Byeli A.V. Multiphase Cu-Ti coatings coated by plasma vacuum-arc deposition on Cu-Be alloy С 17200. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2020, vol. 22, no. 4, pp. 137–150. DOI: 10.17212/1994-6309-2020-22.4-137-150. (In Russian). ______ * Corresponding author Kolubaev Alexanler V., D.Sc. (Engineering), Professor Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, 2/4 pr. Akademicheskii, 634055, Tomsk, Russian Federation Tel.: +7 (382) 228-69-70, e–mail: kav@ispms.ru