Abstract
All metal surfaces, irrespective of their surface integrity, appear as a series of peaks and valleys under close examination. The objective of lubrication is to separate these peaks and valleys so that contact is avoided in metal to metal, hence greatly reduce or eliminate wear. A lubricant may be gas, liquid, semi‐solid, or solid that permits free action of mechanical devices and prevents damage by abrasion and seizing of metal or other components through unequal expansion caused by heat. Among the solid (dry) lubricants includes: graphite, glass, boron nitride, polytetrafluoroethene (PTFE‐Teflon), molybdenum disulfide, tungsten disulfide, lime, talc, etc. Solid (dry) lubricants differ significantly from liquid lubricants, in that liquid lubricants reduce friction due to their fluidity and viscosity. However, solid lubricants have neither of these properties but they are still capable of reducing friction and wear in metal. In this work, the study of the property characteristics of talc as a substitute for graphite in dry lubrication (an overview) was carried out and reported in this paper.
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