研究目的
Investigating the role of a ZDDP in the tribological performance of femtosecond laser-induced periodic surface structures on titanium alloy against different counterbody materials.
研究成果
The study demonstrated that the addition of 2-ethylhexyl-zinc-dithiophosphate to a base oil significantly improves the tribological performance of femtosecond laser-induced periodic surface structures on titanium alloy. The beneficial effect was observed across different counterbody materials, suggesting that the synergy between the additive and the laser-oxidized nanostructures is crucial for reducing friction and wear.
研究不足
The study was limited to specific materials (Ti6Al4V, 100Cr6 steel, Al2O3, Si3N4) and lubricants (VPX oil, VPX oil + 0.5% RC 3180). The tribological tests were conducted under controlled laboratory conditions, which may not fully replicate real-world applications.
1：Experimental Design and Method Selection
The study involved the production of laser-induced periodic surface structures (LIPSS) on titanium alloy (Ti6Al4V) surfaces using a Ti:sapphire femtosecond laser. The tribological performance of these surfaces was evaluated through linear reciprocating sliding tribological tests against balls made of different materials using various oil-based lubricants.
2：Sample Selection and Data Sources
Commercial grade-5 titanium alloy (Ti6Al4V) was used for the study. The surfaces were mechanically polished before laser processing. The tribological tests were conducted against balls made of 100Cr6 steel, Al2O3 ceramic, and Si3N4 ceramic.
3：List of Experimental Equipment and Materials
Ti:sapphire femtosecond laser (Femtolasers, Compact Pro), optical microscopy (Carl Zeiss, Discovery V20/Keyence, VHX 5000), scanning electron microscopy (Carl Zeiss, Gemini Supra 40), confocal profilometer (Nanofocus, μ-surf Expert), focused ion beam milling machine (FEI, Quanta 3D), scanning transmission electron microscope (JEOL, JEM 2200FS).
4：Experimental Procedures and Operational Workflow
The titanium alloy samples were laser-processed to create LIPSS, then subjected to tribological tests under controlled conditions. The wear tracks were analyzed using OM, SEM, and confocal profilometry. STEM analysis was performed on selected wear tracks.
5：Data Analysis Methods
The wear volume was calculated from cross-sectional area measurements of the wear scars. The coefficient of friction was measured during the tribological tests. Elemental analysis was conducted using EDX spectroscopy.
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