TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Maclucas, Timothy
A1  - Daut, Lukas
A1  - Grützmacher, Philipp
A1  - Guitar, Maria Agustina
A1  - Presser, Volker
A1  - Gachot, Carsten
A1  - Suarez, Sebastian
A1  - Mücklich, Frank
T1  - Influence of structural depth of laser-patterned steel surfaces on the solid lubricity of carbon nanoparticle coatings
JF  - Friction
N2  - Carbon nanoparticle coatings on laser-patterned stainless-steel surfaces present a solid lubrication system where the pattern’s recessions act as lubricant-retaining reservoirs. This study investigates the influence of the structural depth of line patterns coated with multi-walled carbon nanotubes (CNTs) and carbon onions (COs) on their respective potential to reduce friction and wear. Direct laser interference patterning (DLIP) with a pulse duration of 12 ps is used to create line patterns with three different structural depths at a periodicity of 3.5 µm on AISI 304 steel platelets. Subsequently, electrophoretic deposition (EPD) is applied to form homogeneous carbon nanoparticle coatings on the patterned platelets. Tribological ball-on-disc experiments are conducted on the as-described surfaces with an alumina counter body at a load of 100 mN. The results show that the shallower the coated structure, the lower its coefficient of friction (COF), regardless of the particle type. Thereby, with a minimum of just below 0.20, CNTs reach lower COF values than COs over most of the testing period. The resulting wear tracks are characterized by scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. During friction testing, the CNTs remain in contact, and the immediate proximity, whereas the CO coating is largely removed. Regardless of structural depth, no oxidation occurs on CNT-coated surfaces, whereas minor oxidation is detected on CO-coated wear tracks.
KW  - solid lubricant coatings
KW  - carbon nanotubes
KW  - carbon onions
KW  - direct laser interference patterning (DLIP) surface structuring
KW  - electrophoretic deposition (EPD)
Y1  - 2023
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:291:415-3981
SN  - 2223-7704
SS  - 2223-7704
U6  - https://doi.org/10.1007/s40544-022-0664-z
DO  - https://doi.org/10.1007/s40544-022-0664-z
VL  - 11
IS  - 7
SP  - 1276
EP  - 1291
ER  -