Experimental Studies on Friction and Scuffing Resistance of Ceramics for Cylinder Linear and Piston Ring.

Experimental Investigations of Steel Scuffing and Coatings for Scuffing Prevention

“…The AM3 steel is the most resistant to heating during sliding, therefore protecting the sliding 83 surfaces from long-duration scuffing events and increased oxidation of the material surfaces. This result is particularly notable due to the AM3 steel not having the highest hardness of the studied steels (see Table 5.1), as high hardness is popularly noted as an important material property in scuffing resistance [47,[57][58][59]63,64,71,72,74,79,80,[88][89][90]. These results show that the thermal properties of materials are also a key property in scuffing resistance, and an optimal scuffing resistant material should not only resist plastic deformation but also resist heating during sliding.…”

“…The most popular method of instigating scuffing in laboratory experiments involves increasing the normal load applied to lubricated sliding specimens, typically in stepwise increments [35,36,38,. Other methods to induce scuffing events in laboratory experiments include using constant loads with sufficiently high contact pressures [6,35,[73][74][75][76][77][78], using starved lubrication conditions [57,[79][80][81][82][83][84], and implementing a progressive increase in temperature [63,70,85,86]. All the previously mentioned experimental approaches promote scuffing events by decreasing the lubricant film thickness between the sliding materials, therefore increasing the likelihood of the direct asperity contacts which precedes scuffing events.…”

“…All the previously mentioned experimental approaches promote scuffing events by decreasing the lubricant film thickness between the sliding materials, therefore increasing the likelihood of the direct asperity contacts which precedes scuffing events. In scuffing experimental investigations of non-lubricated material sliding, some researchers implement progressive increases in the sliding velocities which promotes scuffing by increasing the heat generation at the solid interfaces [54,63]. The design of scuffing experimental methods not only allows evaluation of the application parameters but also rapid assessments of suggested improvements in the materials and protection mechanisms.…”

“…Although several mechanical properties have been discussed in terms of their relevance to scuffing, a material's resistance to plastic flow (i.e. hardness) is an often-referenced property[47,[57][58][59]63,64,71,72,74,79,80,[88][89][90]. Blau et al investigated various alloy and ceramic coating…”