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Title of the article

MECHANISM OF FORMATION OF HETEROGENEOUS DISPERSED PHASE OF GREASES WITH PARTICIPATION OF NANOSIZED ADDITIVES AND ITS INFLUENCE ON PROPERTIES OF LUBRICANTS
Authors

ZHORNIK Viktor I., D. Sc. in Eng., Prof., Head of the Department of Technologies of Mechanical Engineering and Metallurgy — Head of the Laboratory of Nanostructured and Superhard Materials, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

IVAKHNIK Anton V., Ph. D. in Eng., Leading Researcher, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ZAPOLSKY Andrey V., Post-Graduate Student, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MATERIALS SCIENCE IN MECHANICAL ENGINEERING
Year 2020 Issue 3 Pages 63–70
Type of article RAR Index UDK 669.018.95 Index BBK  
DOI https://doi.org/10.46864/1995-0470-2020-3-52-63-70
Abstract It is shown that in the case of the formation of the heterogeneous structure of the dispersed phase (DP) of greases, which includes the soap component in the form of a complex salt of high molecular weight and low molecular weight acids and nanosized particles of the additive, a more branched structural framework of the DP is formed due to the presence of the additional crystallization centers in the form of the additive nanoparticles. This provides the improved colloidal stability, the greater load capacity and the higher dropping point of the lubricant. The additive nanoparticles implanted into the fibers of the soap component of the DP strengthen it and the probability of their aggregation is excluded. Using as an example the complex lithium grease modified by nanosized particles of the diamond-graphite charge ША-А (ShA-A), it is shown that the formation of the DP heterogeneous structure can improve the rheological and tribological characteristics of the grease in comparison with the lubricant of the same component composition, but having a single DP from the lithium complex and modifying nanoparticles ША-А (ShA-A) that are introduced into the dispersion medium (DM) (oil) separately.
Keywords

grease, dispersed phase, nanosized additives, heterogeneous structure, rheological and tribological properties
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