Tribological properties of nano-graphite as an additive in mixed oil-based titanium complex grease

Increasing the size of nano-graphite led to an increase in the optimum additive concentration and decrease in the degree of improvement in the tribological properties of grease.

Influences of Nano-Calcium Carbonate on Friction Properties of Titanium Complex Grease

The effect of nano-calcium carbonate particles as additives on the titanium complex grease was investigated in this paper. Tribological properties of the titanium complex grease containing nano-calcium carbonate were evaluated with a four-ball tester. The morphology of wear scar of steel ball was observed using the sweep electron microscope. The chemical states of typical elements on the wear scars of steel balls were analyzed by means of the X-ray photoelectron spectroscopy. The results showed that the titanium complex grease including 3% or 5% nano- calcium carbonate has better antifriction and antiwear properties. The nano-calcium carbonate particles through generating calcium oxide and adsorption to form a protective film effectively inhibited the adhesive wear and contact fatigue of the friction surface to reduce wear.

Friction and Wear Behavior of Titanium Complex Grease with Admixture Base Oil

Most of the lubricants are made of mineral oil which has bad biodegradability, and, hence, seriously contaminate the environment. To minimise the lubricants’ impact on the environment, this research developed a new type of lubricant, titanium complex grease. Its base oil is the admixture of vegetable oil and mineral oil. Its production method and experimental results are presented in this paper. The friction, wear and physical-chemical properties of the grease were investigated. The morphology of wear scar of steel ball was observed using the sweep electron microscope. The results obtained contribute to the further development of environmentally friendly lubricants.