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As nanotechnology has developed, some nano-additives have been employed to improve the performance of lubricants. The mechanisms of nano-additives still need to be investigated. The wear characteristics of Fe3O4 nano-additive lubricant were investigated in this study. Different diameters of Fe3O4 nanoparticles were mixed in basic oil using an ultrasonic mixer. The new lubricant was used for analytical tests at room temperature. The results showed that nano-lubricants with 20 nm nanoparticles increase the oil film strength. The coefficient of friction was reduced when 20 nm diameter 8 wt% Fe3O4...

Copper microchannels have been attracting more and more attention due to the increasing demands for multifunctional microcomponents in the field of micromanufacturing. In the present work, the forming of microchannels on copper foils was studied by micro rolling. Copper foils with the thickness of 0.1 mm were selected and annealed at 400, 500, 600, 700 and 800 °C for 10 min prior to micro rolling, and the formability and quality of microchannels were systematically investigated. The results show that an optimal annealing temperature of 500 °C is beneficial to the forming of microchannels wit...

Water‐based lubricants with different fractions of TiO2 nanoparticles ranging from 1.0 to 9.0 wt% were utilized to study the lubrication mechanisms during micro rolling tests and the tribological behaviour of nanolubricants during the micro rolling of copper foils. The results indicate that the application of TiO2 nanolubricants remarkably improves the surface quality of rolled copper foils during rolling processes. For lubricants with inadequate TiO2 nanoparticles, it is found that few TiO2 nanoparticles enter the contact regions between the rolls and foils, causing insufficient lubrication...