Tribological behaviors of internal plasma sprayed TiO 2 -based ceramic coating on engine cylinder under lubricated conditions

A comprehensive experimental study on tribological performance of piston ring–cylinder liner pair

“…The friction reaction film has a positive effect on reducing surface wear, and the wear process between friction pairs is accompanied by the continuous destruction and reformation of the friction reaction film. 5,16,25 Under two working conditions, the tested value of the additive element content under 12.5% dilution is higher than that under other dilution conditions, indicating that the 12.5% dilution promotes the generation of friction reaction film on the worn surface, and thus the metal wear decreases. This is also the reason why the wear depth of the cylinder liner under 12.5% dilution is smaller than that under other dilution conditions.…”

“…Because surface coatings have good thermodynamic property, higher hardness, self-lubricating property, and ultra-low friction coefficient, they have an apparent improvement effect on reducing friction loss, wear, and improving scuffing resistance of the PRCL system. 1,2,[5][6][7] For example, Wan et al 1 combined the conventional ceramic coating with the amorphous graphite-like carbon (GLC) on the piston rings and found that the selflubricating effect of the GLC improved the anti-wear and anti-scuffing performance of the piston rings. He et al 5 deposited TiO 2 -based ceramic coating on the cylinder liner by plasma spraying and found that superior stability and higher hardness of the TiO 2 -based ceramic coating had significant improvement in tribological performance.…”

“…1,2,[5][6][7] For example, Wan et al 1 combined the conventional ceramic coating with the amorphous graphite-like carbon (GLC) on the piston rings and found that the selflubricating effect of the GLC improved the anti-wear and anti-scuffing performance of the piston rings. He et al 5 deposited TiO 2 -based ceramic coating on the cylinder liner by plasma spraying and found that superior stability and higher hardness of the TiO 2 -based ceramic coating had significant improvement in tribological performance. Xu et al 8 studied the effects of Ni-P-TiN coating on a piston ring and concluded that Ni-P-TiN coating had a good anti-wear and anti-friction effect.…”

Tribological assessment of NiCr, Al2O3/TiO2, and Cr3C2/NiCr coatings applied on a cylinder liner of a heavy-duty diesel engine

“…Tribological properties of the coated sample were significantly improved relative to the uncoated sample, while wear resistance was increased and COF was reduced, and these improvements were attributed to the high chemical stability to engine oil, smooth surface roughness during friction, and high hardness and H/E of the ceramic coating. 14…”

Effect of Cr2O3 on the microstructure and tribological performance of sprayed Fe-based coating on cylinder liner

“…24 Thus, three different fractions of Cr 2 O 3 -added ferrous coatings were fabricated in this research, and the effect of the Cr 2 O 3 fraction on the microstructure and tribological performance of sprayed Fe-based coating on cylinder liner was investigated. [25][26][27] Microstructure, chemical composition, and phase structure of wear scar of sprayed coating were tested at different conditions so as to evaluate the wear mechanism and the role of Cr 2 O 3 in the reduction of coefficient of friction (COF) and wear rate. This investigation was beneficial to provide a more comprehensive view to assess the feasibility of Fe-based coatings in replacing heavy cast iron engine component by aluminum alloys.…”