研究目的
To accelerate the application of bio-oil in industry and prevent the corrosive wear of the tribopairs in bio-oil by synthesizing novel laser-induced coatings on the cylinder liners.
研究成果
Nickel-based coatings, especially those with MoS2 nanosheets and graphene, showed improved tribological performances under bio-oil lubrication. Laser-induced coatings exhibited lower surface roughness, higher microhardness, and better antifriction and antiwear properties than traditional coatings. The formation of a robust tribo-layer contributed to the excellent performances.
研究不足
The study focuses on the tribological performances under bio-oil lubrication conditions. The effects of other lubricants or environmental conditions were not explored.
1：Experimental Design and Method Selection
Laser-induced coatings were synthesized on the cylinder liner rubbing surfaces with the introduction of MoS2 nanosheets and graphene. The tribological performances were tested on a multifunctional cylinder liner-piston ring tribometer.
2：Sample Selection and Data Sources
Cylinder liner specimens were boron cast iron and piston ring specimens were made from ductile iron. Bio-oil was used as the lubricant.
3：List of Experimental Equipment and Materials
YLP-F10 fiber laser machine (Han's Laser), multifunctional cylinder liner-piston ring tribometer, SEM (JEOL JSM-5600LV), Raman spectrophotometer (Horiba Jobin Yvon Raman, HR Evolution), X-ray Diffraction (XRD, Rigaku D/MAX2500V).
4：Experimental Procedures and Operational Workflow
The cylinder liner specimens were degreased and activated before electroless plating. Laser irradiation was applied during the plating process. Tribological tests were performed under bio-oil lubrication conditions.
5：Data Analysis Methods
The friction coefficient was calculated automatically by the instrument. Wear loss was calculated by the difference in weight before and after sliding. Surface and sub-surface analysis was conducted using SEM, Raman spectra, and EDS.
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