Influence of Adding Contaminants Particles to Lithium Grease on Friction Coefficient

Key Points

• The aim is to assess how the incorporation of solid particles into lubricants alters the friction coefficient.
• Dispersed silica sand and iron powder in lithium grease.
• Examined effects on friction and wear using a stainless steel pin and aluminum disc.
• Varying particle sizes, solid concentrations, sliding velocities, and normal loads were tested.
• Iron particles reduced friction and wear, even at low concentrations (2 wt. % and 4 wt. %).
• Silica sand's effect on friction coefficients varied with particle size.
• Overall improvements in performance were noted with the addition of contaminants.