The effect of ultrasonic vibrations with simultaneously superimposed low-frequency modulation on the properties of polytetrafluoroethylene modifield with detonation nanodiamonds

Improving the process of cold pressing technology of polymer composite materials based on polytetrafluoroethylene, in order to obtain parts of friction units with predetermined operational properties, to ensure their durability and wear resistance, is an urgent task of modern materials science. The article considers the influence of technological modes of pressing on the tribotechnical characteristics and mechanical properties of polytetrofluoroethylene modified with detonation nanodiamonds of various concentrations.As a result of the research, it was found that the use of the technological mode of ultrasonic pressing with a frequency of 17 kHz and simultaneously superimposed low-frequency amplitude modulation of 100 Hz for pressing products made of polytetrafluoroethylene modified with detonation nanodiamonds of 0.5 % mass, allows to increase the tensile strength by 18 %, elongation by 14 %, modulus of elasticity by 15 % and reduce the intensity of mass wear by 22 % and the coefficient of friction by 17 %.