Correlation between microstructure, chemical components and tribological properties of plasma-sprayed Cr 2 O 3 -based coatings

Comparison of dry sliding wear behavior of plasma sprayed FeCr slag coating with Cr2O3 and Al2O3‐13TiO2 coatings

“…The XRD pattern of Al2O3 + 13TiO2 also indicates the formation of an aluminum titanium oxide (AlTi7O15) phase in addition to stable α and metastable ɣ‐alumina phases. Plasma sprayed Cr 2 O 3 coatings, on the other hand always exists in eskoalite phase which has been widely used for tribological protection of metal matrix owing to its favorable thermal conductivity, wear, and friction characteristics …”

Porosity and Its Significance in Plasma Sprayed Coating: A Review

“…From these previous work, it is evident that nanostructured materials produce better coating compared to the conventional ones [8]. From this backdrop, it is evident that nanostructured chromium oxide will have a denser coating and lower porosity level.…”

“…It is recommended that low cost metals which possess same mechanical and physical characteristics as the high cost wear resistant counterparts be used with a wear protective coat. hardness and adhesion strength are two vital properties of a coating that need consideration when it comes to wear resistance [8]. Hard ceramic like chromium oxide, does not abrade easily.…”

“…[85] improved wear resistance of chromium oxide by doping modification and changing the microstructural scale of the coating. They used CeO 2 and Nb 2 O 5 which also had improved effects on the porosity of coating [86]. From the above criteria, doping can also be used in densification of the top coat by the way of reducing the level of porosity.…”

“…Yang et al [8] noted that modification through doping, for instance Cr 2 O 3 − 3% 2 and Cr 2 O 3 − Al 2 O 3 not only improved wear resistance but also reduced porosity significantly. Sadri E et al [87] and Leclerc C [88] in their investigation on self-lubrication by adding solid lubricants such as CaF2…”