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Friction Control by Deformation Mode in Nanopatterned Amorphous Carbon
Dahye Shin1, Dong Gyu Kang2, Kie Young Woo3
1Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
Nano Letters
|December 9, 2020
Summary
Friction control is achieved by altering surface deformation modes, not just contact. Nanopatterned amorphous carbon surfaces show a fivefold change in friction coefficient by transitioning from elastic fracture to plastic flow.
Area of Science:
- Materials Science
- Tribology
- Surface Engineering
Background:
- Traditional friction control relies on contact mechanics.
- Interface deformation and failure are often overlooked in friction studies.
Purpose of the Study:
- To explore friction control in amorphous carbon via plasticity and deformation mode transitions.
- To investigate the role of nanopattern topography in mechanical responses and friction.
Main Methods:
- Fabrication of nanopatterned amorphous carbon surfaces.
- Mechanical testing to analyze deformation modes (elastic fracture, plastic flow).
- Measurement of friction coefficients across different nanopattern topographies.
Main Results:
- Demonstrated friction control through plasticity and deformation mode transitions.
- Observed a fivefold change in friction coefficient.
- Showcased that friction can be tuned without altering the intrinsic material structure.
Conclusions:
- Nanopatterned surfaces offer a novel route for friction control.
- Plasticity and deformation mode are critical factors in tailoring surface friction.
- This approach provides a new strategy for designing surfaces with tunable friction properties.
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