Friction, lubrication and wear mechanisms of surfaces.
Tribology studies friction, wear and lubrication. Wear types: adhesive, abrasive, erosive, fatigue and corrosive. Archard's law V=kFs/H. Lubrication regimes: boundary, mixed, hydrodynamic (Stribeck curve). Surface treatments (nitriding, DLC, hardfacing) cut wear.
Engine bearings run on a hydrodynamic oil film at speed.
Friction, wear and lubrication determine the life of moving parts, so tribology is key for bearings, gears and seals.
Friction, lubrication and wear mechanisms of surfaces.
Friction, wear and lubrication determine the life of moving parts, so tribology is key for bearings, gears and seals.
Adhesive, abrasive, erosive and fatigue wear, each caused by a different mechanism at the contact surface.
It separates surfaces with a film, which reduces friction and wear, and the regime depends on film thickness relative to surface roughness.
Typical applications include choosing a lubricant for a gearbox that runs at high load, selecting a hard coating for a cutting tool to reduce wear and designing a bearing surface that resists adhesive wear.
Study "Oxidation and high temperature degradation" first (topic 32 of 100 in Materials & Chemical). It covers the groundwork this topic builds on.
Coefficient of friction. Surface roughness. Oil viscosity and additives.
Engine bearings run on a hydrodynamic oil film at speed.
The next topic is "Ceramics", which builds directly on this one.
It is classed as Beginner in Materials & Chemical (topic 33 of 100). It is an entry-level topic. It relies only on basic school mathematics and the ideas introduced earlier in this discipline.
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