Journal
FRICTION
Volume 11, Issue 7, Pages 1307-1319Publisher
SPRINGER
DOI: 10.1007/s40544-022-0671-0
Keywords
polytetrafluoroethylene (PTFE); coating; durability; laser texturing; Hilbert curve; stainless steel
Categories
Ask authors/readers for more resources
Texturing stainless steel substrates using shallow Hilbert curve patterns through laser processing can improve coating durability and friction performance. The best texture was achieved with a texture path segment length of 12 μm and laser power of 15%.
Shallow Hilbert curve patterns with easily programmable texture density were selected for laser texturing of stainless steel substrates. Two different texture path segment lengths (12 and 24 mu m) and four different laser power percentages (5%, 10%, 15%, and 20%) were investigated. The textured and smooth substrates were coated with thin polydopamine/polytetrafluoroethylene (PDA/PTFE) coatings for tribological property assessment. The effects of texture density (texture area coverage) and laser power on the durability and friction of the coated surfaces were studied. Laser texturing the substrates improved the coating durability up to 25 times, reduced the friction coefficient, and prevented coating global delamination. The textures fabricated with a laser power of 15% and a texture path segment length of 12 mu m yielded the best coating durability. The textures provided the interlocking for the PTFE coating and thus prevented its global delamination. Furthermore, the PTFE inside the texture grooves replenished the solid lubricant worn away in the wear track and prolonged the coating wear life.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available