Physical Interpretations of Internal Magnetic Field Influence on Processes in Tribocontact of Textured Dimple Surfaces
| Authors | V.Ye. Marchuk1 , M.V. Kindrachuk1 , V.I. Mirnenko2, R.G. Mnatsakanov1, A.O. Kornіenko1, O.V. Bashta1, S.V. Fedorchuk1 |
| Affiliations |
1 National Aviation University, 1, Kosmonavt Komarov Prosp., 03058 Kyiv, Ukraine 2 The National Defense University of Ukraine named after Ivan Cherniakhovskyi, Povitroflotsky Avenue, 03049 Kyiv, Ukraine |
| Е-mail | nau12@ukr.net |
| Issue | Volume 11, Year 2019, Number 5 |
| Dates | Received 27 April 2019; revised manuscript received 08 October 2019; published online 25 October 2019 |
| Citation | V.Ye. Marchuk, M.V. Kindrachuk, V.I. Mirnenko, et al., J. Nano- Electron. Phys. 11 No 5, 05013 (2019) |
| DOI | https://doi.org/10.21272/jnep.11(5).05013 |
| PACS Number(s) | 83.60.Np |
| Keywords | Internal magnetic field, Textured dimple surface, Lubricant, Discrete region, Induction of magnetic field. |
| Annotation |
The physical interpretations of internal magnetic field influence on the processes and phenomena in places of tribocontacts with textured dimple surfaces were formed. Experimental studies have established that, along with traditional processes of formation and destruction of surface layer in tribocontact, there are processes of excitation of internal magnetic fields at edges of discrete regions. Depending on contact pair, induction of magnetic field at the edges of discrete regions is 44-65 mT. The physical processes of magnetic field influence on mechanism of wear products removal under conditions of boundary lubrication are considered. It is shown that the ponderomotive force in magnetic field is the force acting on a particle in nonuniform magnetic field and directs it towards a greater magnetic field induction – the edges of discrete regions. The physical processes of the internal magnetic field influence on lubricant are investigated. The internal magnetic field causes dipole-orientation polarization of lubricant molecules that absorb energy of the magnetic field. As a result, the number of diamagnetic molecules of lubricant increases, a stable lubricant layer on tribocontact surface is formed, and less energy is required to be spent on regeneration of boundary lubricant films, which positively affects wear resistance of surface layer of elements made with textured dimple surfaces. These processes retain their activity in process of friction when lubricant molecules move behind the magnetic field created by discrete regions edges. The dependence of lubricant loss tangent on temperature and magnetic field is investigated. Growth of lubricant temperature above 200 °C leads to a rapid increase in loss tangent by 1.8 times, in comparison with dielectric losses of lubricant not exposed to magnetic field, due to the formation of ion radical complexes and charge transfer systems, which contributes increase of relaxation losses by increasing number of dipole molecules and weakly bound ions. |
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