Thermodynamics has historically been used to derive characteristic material properties. In this study, fundamental thermodynamics is applied grease. First-principle formulations of existing properties—heat capacity and storage modulus—and new properties—thermal strain stress coefficients, chemical resistance thermo-chemical decay coefficient—are derived, some which are experimentally determined...

Greases with two different thickeners, namely lithium complex (LiX) and polypropylene (PP), three base oil viscosities were investigated in fretting varying displacement amplitude applied normal load. The material combinations silver-coated copper/silver-coated copper (Ag/Cu vs Ag/Cu) steel/steel investigated. Fretting maps of four the six evaluated greases constructed as a tool to better under...

The tribological behavior of novel 7.5 wt% carbon nanotube-based lubricant greases in PAO (polyalphaolefin) oil with and without 1.0 MoS2, together several other commercial such as calcium, lithium, were studied. test results showed a marked reduction frictional coefficient achieved by the CNTs based grease samples an average benefit around 30% compared to conventional greases. steady state und...

Abstract In this article, Lewis acid–base complex of lithium 12-hydroxystearate (LHS) with diboron compound is formed by the introduction bis(pinacolato)diboron (B 2 Pin ) into grease. The interaction between acid B and base RCO ? LHS characterized various techniques. Moreover, rheological tribological behaviors grease are evaluated at low moderate temperature. results indicate that addition ca...

Grease lubricants are widely used in rolling contact applications to reduce friction between two surfaces. Improper lubrication may cause high stress and deformation the bearings lead machine failure The purpose of this study is investigate coefficient produced by newly developed palm oil-based grease characteristics lubricated roller bearings. In work, new greases was evaluated experimentally ...