🗊Презентация The possibility of modifying the elements of the metal powder assembly with nanoparticles in order to reduce the friction

The possibility of modifying the elements of the metal powder assembly with nanoparticles in order to reduce the friction coefficient    Prof. Hab.Dr.Sc.Viktors Mironovs, Dr.Sc. Aleksey Tatarinov, Mg.Sc. Pavel Stankevich, Mg.Sc. Andrej Shishkin – Riga Technical University ( Latvia) Prof.Dr.Sc. Oleg Tolochko, Dt.Sc. Ekaterina Vasilyeva, Mg.Sc. Alexander Breki – S.Peterburg Peter the Great State Polytechnic University ( Russia)

Studies using acoustic control

TEM micrographs of WS2 (a) and WSe2 (b) nanoparticles.

Dependence of the frictional torque versus time when testing a sleeve impregnated with mineral oil MS-20 and lubricating compositions containing 4wt.% of WSe2 and WS2

Conclusions . The test bushings with friction on the flat base of steel cylinder have close moments of friction at brakedown and time intervals before stationary friction start, which is related to the identity of the initial conditions of friction, as well as to overlapping pores with oxide films of a certain thickness. 2. When the bushings is impregnated with the lubricating composition MS-20 + 4% WSe2 and MS-20 + 4% WS2, the average frictional torque decreases by ≈53% and ≈44% respectively in comparison with the bushings impregnated with MS-20 lubricating oil. 3. The most stable moment of friction was shown by bushings impregnated with lubricating composition MS-20 + 4% WS2, that may correspond with the shape of nanoparticles.