Bearings material Bronze bearings 1 Cu–Sn–Zn/Gr alloy 1 Cu–sn–zn/graphite alloy 1 Density (specific gravity) 1 Extreme conditions 1 Graphite 1 Hardness 1 Lubrication / 1 Mechanical characteristics 1 Mechanical properties 1 Metal matrix composite 1 Metallic matrix composites 1 Metals 1 Microstructural characteristics 1 Molybdenum compounds 1 Porosity 1 Powder metallurgy 1 Powder metals 1 Sintering 1 Solid lubricants 1 Strength values 1 Sulfur compounds 1 Tribological contacts 1 Wear of materials 1 Wt% graphite 1 Yield stress 1 Zinc alloys 1 wt% graphite 1