| Title |
Tribological properties of Cr2O3, Cr2O3–SiO2-TiO2 and Cr2O3–SiO2-TiO2-graphite coatings deposited by atmospheric plasma spraying |
| Authors |
Bastakys, Lukas ; Marcinauskas, Liutauras ; Milieška, Mindaugas ; Kalin, Mitjan ; Kėželis, Romualdas |
| DOI |
10.3390/coatings13020408 |
| Full Text |
|
| Is Part of |
Coatings.. Basel : MDPI. 2023, vol. 13, iss. 2, art. no. 408, p. 1-17.. ISSN 2079-6412 |
| Keywords [eng] |
plasma spraying ; chromia coatings ; graphite ; tribological properties ; friction coefficient |
| Abstract [eng] |
In this study, Cr2O3, Cr2O3-SiO2-TiO2 and Cr2O3-SiO2-TiO2-graphite coatings were formed by atmospheric plasma spraying. The influence of SiO2-TiO2 and SiO2-TiO2-graphite reinforcements on the surface morphology, elemental composition, structure and tribological properties of chromia coatings was determined. The friction coefficients and specific wear rates were investigated by a ball-on-flat configuration using 1 N and 3 N loads under dry-lubrication conditions. The addition of SiO2-TiO2-graphite resulted in the lowest surface roughness and the most homogenous surface of the coatings. The X-ray diffraction (XRD) measurements demonstrated that all as-sprayed coatings consisted of an eskolaite chromium oxide phase. The results showed that the Cr2O3-SiO2-TiO2 coating demonstrated the lowest friction coefficient values. The SiO2-TiO2 and SiO2-TiO2-graphite additives reduced the specific wear rates of Cr2O3 coatings by 30% and 45%, respectively. Additionally, the wear resistance was improved almost 45 times in comparison to the steel substrate. |
| Published |
Basel : MDPI |
| Type |
Journal article |
| Language |
English |
| Publication date |
2023 |
| CC license |
|
