Grinkevych K. Methods of increase of operational characteristics tribological materials in conditions of dynamic loading

Dissertation for the Cand. Tech. Sci. on a speciality 05.02.04 - friction and wear in machines. - National Aviation University, Kiev, 2004. The thesis is devoted to studying the influence of the ultra-disperse inorganic components in lubricating mediums on tribological and physical-chemical processes happening on a surface of materials while friction in conditions of dynamic loading. In the work the experimental confirmation of Bershadsky's theory about synergetic influence of additional nonlinear effects on the properties of tribological systems is obtained. The correlation of the values of the information entropy of the parameters of the tribological system measured in experiment with conditions of the formation of dissipative self-organizing structures during friction is established. The installation and package of software for the research of tribophysical and tribotechnical characteristics of materials is developed. The criterions of the evaluation of tribodynamic parameters of friction are offered. The methodology of the choice of ultra-disperse inorganic additions for purposeful formation of a coating adapted to specific conditions is developed. The results of the work have found industrial application for want of the development of new structures and technology of producing of stable lubricating compositions by means of introducing and stabilizing of the nanocrystalline ultra-disperse inorganic additions in lubricating mediums by ultrasonic processing. Key words: nanodisperse inorganic powders, friction, wear, dynamic loading, lubrications, ultrasonic processing.