Tribological behavior of ZnO-Si3N4 nanoparticles-based lubricating grease

Correlation between System Entropy and Structural Changes in Lubricating Grease

Lubricating greases are colloid disperse systems consisting of a base oil and a thickener (additional additives). The lubricant is modeled as a tribological system, and the reaction of a fluid friction stress is investigated. The energetic situation of the volume element is analyzed and the system entropy described. The description of the structural degradation and the used entropy was realized...

Influence of Graphene Nanoflakes Addition on Grease Tribological Properties

Tribological behavior of vegetable oil-based lubricants with nanoparticles of oxides in boundary lubrication conditions

This work studied the development of vegetable based lubricants and the addition of oxides nanoparticles (ZnO and CuO) as additive for extreme pressure (EP), exploring the EP and oil base influence in tribological behavior. The results showed that with the addition of nanoparticles to conventional lubricant, the tribological properties can be significantly improved. A smoother and more compact ...

Grease Noise in Ball Bearings Noise generation in bearings and its effect, influence of the lubricating grease, grease noise tester, test procedure and requirements

The essential customer needs of today, namely long bearing service life and low noise performance, demand the availability of a means to verify that the required cleanliness level and lubrication conditions are fulfilled. To fulfil these needs, a new equipment, the SKF BEQUIET+ tester has been developed to assess the quality of the lubricant with regard to cleanliness and damping characteristic...

Tribological Stress of Lubricating Greases in the Light of System Entropy

Abstract: Lubricating greases show a structural degradation due to friction stress. The shear process dissipates energy. This results in a breakdown of the thickener structure, heat and entropy generation. Tribo-systems are energy driven systems. The stressed lubricating grease is modeled as a subsystem and presents an open thermodynamic system. Investigations were made to obtain more informati...