EXPERIMENTAL STUDIES OF TRIBOSYSTEMS IN THE PRESENCE OF FULLERENES IN LUBRICANT. PART 1. BY PARAMETER OF TRIBOLOGICAL CHARACTERISTICS OF BASE OIL
DOI:
https://doi.org/10.18372/0370-2197.2(91).15526Keywords:
lubricating film, tribological properties of base oils, volume wear rate, coefficient of friction, fullerenes, tribosystem, adequacy of the mathematical model, simulation errorAbstract
The paper presents the results of experimental research aimed at confirming the adequacy of the developed mathematical models method of forming a wear-resistant lubricating film on friction surfaces in the presence of fullerene compositions for different base oils. From the analysis of the presented experimental values and their comparison with theoretical dependences it follows that the mathematical model of formation of a lubricating film on a friction surface of triboelements, which is developed in previous works of the authors, adequately reflects the process of friction and wear and is in a functional relationship with the wear rate and coefficient of friction.Experimental studies have confirmed the theoretically obtained in previous works, the use of fullerene composition, consisting of a solvent-vegetable oil and a fine powder of fullerenes, reduces the rate of wear when changing the tribological properties of base oils by 20,1 ... 22,6%. The simulation error is 6,5 ... 9,2%.Based on experimental studies, it is concluded that the introduction of fullerene composition in base oils with low values of tribological properties reduces the coefficient of friction by 18%. The maximum effect of reducing the coefficient of friction is equal to 71 - 86%, characteristic of base oils with average values of tribological properties.Experimental studies have confirmed that the increase in the concentration of fullerene composition in the base oil from 50 g/kg up to 150 g/kg allows to reduce the volumetric wear rate and the coefficient of friction between these concentrations by 7,8% (theoretical result 6,4%). Therefore, the direction of reducing the volumetric wear rate and friction coefficient by increasing the concentration of the fullerene composition more 100 g/kg can be considered ineffective and experimentally confirmed.References
Vojtov V. A., Kravcov A. G., and Tsymbal B. M. Evaluation of Tribotechnical Characteristics of Tribosystems in the Presence of Fullerenes in the Lubricant / FRICTION AND WEAR, 2020, Vol. 41, No. 6, 521- 525. DOI: 10.3103/S1068366620060197
Anurag Singh, Prashant Chauhan, Mamatha T. G. A review on tribological performance of lubricants with nanoparticles additives // Materials today: proceedings Volume 25, Part 4, 2020, Pages 586-591 https://doi.org/10.1016/j.matpr.2019.07.245
Sheida Shahnazar, Samira Bagheri, Sharifah Bee Abd Hamid Enhancing lubricant properties by nanoparticle additives // International Journal of Hydrogen Energy Volume 41, Issue 4, 2015, Pages 3153-3170 https://doi.org/10.1016/j.ijhydene.2015.12.040
Imran Ali, Al Arsh Basheer, Anastasia Kucherova, Nariman Memetov, Tatiana Pasko, Kirill Ovchinnikov, Vladimir Pershin, Denis Kuznetsov, Evgeny Galunin, Vladimir Grachev, Alexey Tkachev Advances in carbon nanomaterials as lubricants modifiers // Journal of Molecular Liquids Volume 279, 2019, Pages 251-266 https://doi.org/10.1016/j.molliq.2019.01.113
Yanli Yao, Xiaomin Wang, Junjie Guo, Xiaowei Yang, Bingshe Xu Tribological property of onion-like fullerenes as lubricant additive // Materials Letters Volume 62, Issue 16, 2007, Pages 2524-2527 https://doi.org/10.1016/j.matlet.2007.12.056
L. Rapoport, Y. Feldman, M. Homyonfer, H. Cohen, J. Sloan, J. L. Hutchison, R. Tenne Inorganic fullerene-like material as additives to lubricants: structure–function relationship // Wear Volumes 225–229, Part 2, 1999, Pages 975-982 https://doi.org/10.1016/S0043-1648(99)00040-X
F. A. Yunusov, A. D. Breki, E. S. Vasilyeva, O. V. Tolochko The influence of nano additives on tribological properties of lubricant oil // Materials today: proceedings Available online 14 February 2020 https://doi.org/10.1016/j.matpr.2020.01.447
Xiaowei Li, Xiaowei Xu, Yong Zhou, Kwang-Ryeol Lee, Aiying Wang Insights into friction dependence of carbon nanoparticles as oil-based lubricant additive at amorphous carbon interface // Carbon, Volume 150, 2019, Pages 465-474 https://doi.org/10.1016/j.carbon.2019.05.050
Кравцов А.Г. Разработка математической модели взаимодействия электрически активных гетерогенных мелкодисперсных систем на границе раздела поверхность тре-ния – смазочная среда // Проблеми трибології. – 2017. – № 3. – С. 89 – 99.
Кравцов А.Г. Моделирование формирования масляной пленки на поверхности трения при наличии фуллереновых добавок в смазочном материале и ее влияние на ско-рость изнашивания трибосистем // Проблеми трибології. – 2018. – № 1. – С. 69 – 77.
Войтов В. А., Захарченко М.Б. Интегральный параметр оценки трибологических свойств смазочных материалов // Збірник наукових праць Української державної академії залізничного транспорту. — Харків: УкрДАЗТ. — 2015 (2), № 151, 5—10
