Open pored metallic nanostructures have been widely studied due to their excellent tribological performance, superior mechanical properties, favorable electrical conductivity, potential catalytic capability and large surface areas. Through nanomanufacturing, various types of nanofabricated open pore metallic structures can be generated with well defined geometry and dimension. Among those, nickel (Ni)-based nanofabricated open pore metallic structures have distinct and exclusive properties due to their remarkable structural and surface stability. The tribological and mechanical properties of Ni-based nanofabricated open pore metallic structures must be investigated in order to design durable functional nanofabricated open pore metallic structure-based micro devices and nanosystems.

In present work, the electrical potential induced frictional behavior of nanofabricated open pore metallic structures has been studied. Open pore structural and electrical potential effects on the mechanical and tribological properties of Ni-based nanofabricated open pore metallic structures have been studied. Ni-based nanofabricated open pore metallic structures were prepared to investigate the relation between tribological properties and the pore size of the nanofabricated open pore metallic structures by using atomic force microscope (AFM). Moreover, the effects of electrical potential on tribological properties was also determined by applying various electrical potential condition on Ni-based nanofabricated open pore metallic structures.

In order to build mechanically durable functional micro/nano devices, which are influenced by electric potential, the relation between electric potential and the mechanical/ tribological behaviors of the Ni-based nanofabricated open pore metallic structures need to be investigated. The mechanical behaviors of Ni-based nanofabricated open pore metallic structures by conducting a nanoindentation experiment with a nanoindenter. Specifically, the mechanical properties of Ni-based nanofabricated open pore metallic structures were determined in order to investigate the effect of electric potential on the indentation modulus of the nanofabricated open pore metallic structures with applying an electric potential.

We observed that the tribological properties of Ni-based nanofabricated open pore metallic structures were able to be controlled by applying electrical potential. The nanofabricated open pore metallic structures showed the decreased frictional properties with increasing electrical potential. The electrical potential can influence to the mechanical properties of Ni-based nanofabricated open pore metallic structures. We found that increasing electrical potential decreases contact area between AFM tip and Ni-based nanofabricated open pore metallic structures due to the improvement of the mechanical properties of the nanofabricated open pore metallic structures.

The findings of this study would be useful for design mechanically robust and reliable multifunctional nanofabricated open pore metallic structures, and the theoretical approaches would be expending the scope of future studies in terms of electro-tribological behavior of nanopored metallic structures.


Nanofabricated Open-Pore-Metallic Structures for Friction Control

Division / Sponsors: 
Aerospace, Bioengineering, Applied Mechanics, Design Engineering Division, Advanced Energy Systems, Manufacturing Engineering Division, Noise Control and Acoustics, Nondestructive Evaluation, Diagnosis, and Prognosis (NDPD), Nuclear Engineering Division, Process Industries Division, Fluids Engineering, Heat Transfer, Materials, Microelectromechanical Systems, Safety Engineering and Risk Analysis, Computers & Information in Engineering


Paper Proceedings: https://asmedigitalcollection.asme.org/IMECE/IMECE2020/volume/84478

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