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- W4308522083 abstract "The present study aims to investigate the effect of the addition of Ag on the tribological performance of a CrAlN coating system, at room and high temperatures (600 °C). The addition of Ag, in general, has been seen beneficial in lowering the coefficient of friction (COF) at room and high temperatures. Independent of the decrease of COF with Ag additions, the specific wear rate was degraded. The only exception was the CrAlNAg9 coating with 8.6 at.% of Ag which exhibited the lowest specific rate at room temperature while maintaining its comparable wear resistance properties with that of reference CrAlN coating at 600 °C. The CrAlNAg9 coating also demonstrated coefficient of friction (COF) of 0.16 and 0.26 at room temperature and 600 °C, respectively. Formation of Ag and AgCrO 2 -rich tribolayer during sliding at high temperature was responsible for lubricious properties of CrAlN(Ag) coatings. However, doping the coatings with small content of Ag (around 2.4 at.%) was not effective in decreasing the COF, nor the specific wear rate under high temperatures. On the other hand, high concentration of Ag (11.8 at.% and above) had a detrimental influence on mechanical properties and poor resistance to oxidation at elevated temperature compromising both friction and wear properties of the CrAlNAg12 and CrAlNAg16 coatings. • Room and high temperature tribology of CrAlN(Ag) films with different Ag concentrations. • 8.6 at.% of Ag showed best tribological performance at room temperature and 600 °C. • Ag and AgCrO 2 phases are responsible for the low friction at 600 °C. • Oxides of Cr and Al inside the wear track caused rise in friction during sliding. • High Ag content has negative influence on tribological properties CrAlN(Ag) films." @default.
- W4308522083 created "2022-11-12" @default.
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- W4308522083 date "2022-11-01" @default.
- W4308522083 modified "2023-10-15" @default.
- W4308522083 title "Room and high temperature tribological performance of CrAlN(Ag) coatings: The influence of Ag additions" @default.
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- W4308522083 doi "https://doi.org/10.1016/j.surfcoat.2022.129011" @default.
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