Tribological behaviour of thermally sprayed silicon carbide coatings

Microstructure and Wear Behavior of Plasma-Sprayed TiO2–SiAlON Ceramic Coating

“…In addition, SiO2 can be found in the coating, due to the oxidation of SiAlON and probably Si3N4 as well. The study has shown that the SiO2 formed during the spraying process facilitates the formation of the tribo-film, which is beneficial for the friction performance [25]. The surface morphology of the coating conveys information on the melting of particles.…”

“…Figure 12d shows that under the starved lubrication condition, fewer cracks form in the coating surface under the cover of the oil layer. The tiny pores in the coating can act as lubricant reservoirs that promote the retention of the fluid at the contact zone in the tests performed in PAO and form an oil layer [25]. The oil layer adsorbed on the surface of the friction pair can isolate the contact of the sliding ball and sample, which contributes to lower and more stable friction, resulting in lower wear rates.…”

Tribological behavior of AlCoCrCuFeNi and AlCoCrFeNiTi0.5 high entropy alloys under hydrogen peroxide solution against different counterparts

“…8, the O1s peak intensity is observed on the worn surface of SiC ceramic. In the XPS spectra for Si 2p, the peak around 102 eV belonging to Si-O x configuration [28][29][30], indicates Si atoms are oxidized. This phenomenon is because that the OH radicals (OH•) could be obtained from the reaction of H 2 O 2 molecules with the iron in high entropy alloy [31,32].…”

Investigation on Microstructural Characteristics and Mechanical Properties of Thermally Sprayed Fe-Base Composites Reinforced with Different Ceramic Particulates

“…Another reason for the growing interest in Fe-based coatings is to replace Co-and Ni-based coatings, which have complications in application with their toxicity, high price, requirement of addition of binder phase for stability, and possibility of allergic skin reaction in the case of Ni based alloys [14][15][16][17][18]. It is speculated that the performance of Fe-based coatings in erosive and harsh environment service conditions could also be improved with the addition of some hard materials such as carbides, nitrides, and borides to the steel powder matrix [1][2][20][21]. Fe3C and SiC have been considered as the reinforcement phases in this study due to their high hardness, good wear resistance, and low cost specially compared to borides and nitrides [22][23].…”