Three diprotic ionic liquids (PILs) containing bis(2-hydroxyethyl) ammonium cations and citrate (DCi), lactate (DL), or salycilate (DSa) hydroxy/carboxylate anions were studied as lubricants for Ti6Al4V–sapphire contact. At room temperature, the neat PILs are non-Newtonian fluids, which show up to a 70% friction coefficient reduction with respect water. New aqueous developed using 1 wt.% additi...

The Walther equation is often used for the viscosity temperature characteristics of lubricants. However, it was found that cannot be applied to high pressure viscosity. In this study, relationship between viscosity, and analyzed. As a result, at each negatively proportional square temperature, linear equations converges absolute zero were derived. parallel, thought experiment conducted on ideal...