Rehbinder Effect in Nature and Technology

Lubricating greases are essential for the performance of friction units in various machines and mechanisms. In these cases, surfactants play a dual role at early stages of their use, they enhance wear and thus facilitate a breaking-in of the friction surfaces, while at later stages, they form protective adsorption layers that help to retard wear in the parts. The role of surface-active media in the processes of friction and wear is the subject of tribology, which constitutes a separate area of physical-chemical mechanics [95-106]. 

Physical-Chemical Mechanics of Disperse Systems and Materials 

FIGURE 7.49 Schematic illustration of the application of liquid metal embrittlement in the drilling of very hard materials. 

FIG U RE 7.50 The introduction of an active component into the diamond grinding wheel. This additive facilitates the treatment of hard alloys. (Redrawn from Shchukin, E.D. (Ed.), The Successes of Colloid Chemistry and Physical-Chemical Mechanics, Nauka, Moscow, Russia, 1992.) 

FIGURE 7.51 The experimental scheme of the electro-chemo-mechanical treatment of the extremely hard metal materials (1) sample, (2) electrolyte, (3) loading, (4) grinding wheel, (5) treated surface, (6) power supply, (7) motor, and (8) anode. (Redrawn from Videnskiy, LV. et al.. Colloids Surf., 156, 349, 1999 Shchukin, E.D., Colloids Surf., 49, 529, 1999 Videnskiy, LV. et al., J. Mater. Res., 8, 2224, 1993.) 

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