Laser surface texturing of both thin polytetrafluoroethylene coatings and stainless steel substrates for improving tribological properties

Firuze Soltani-Kordshuli; Charles Miller; Nathaniel Harris; Min Zou

Polymer Testing (Jan 2023)

Laser surface texturing of both thin polytetrafluoroethylene coatings and stainless steel substrates for improving tribological properties

Firuze Soltani-Kordshuli,
Charles Miller,
Nathaniel Harris,
Min Zou

Affiliations

Firuze Soltani-Kordshuli: Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR, 72701, USA; Center for Advanced Surface Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
Charles Miller: Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR, 72701, USA; Center for Advanced Surface Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
Nathaniel Harris: Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR, 72701, USA; Center for Advanced Surface Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
Min Zou: Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR, 72701, USA; Center for Advanced Surface Engineering, University of Arkansas, Fayetteville, AR, 72701, USA; Corresponding author. Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR, 72701, USA.

Journal volume & issue: Vol. 117
p. 107852

Abstract

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Hilbert curve patterns were laser-textured on both stainless steel substrates and polytetrafluoroethylene (PTFE) thin coatings by applying 15% and 5% of the 2.3-W full laser power, respectively. The nanomechanical and tribological behavior of both smooth and laser-textured PTFE coatings on both smooth and laser-textured stainless steel substrates were studied. It was found that laser-texturing thin PTFE coatings reduced the hardness of PTFE coatings and prevented the coating from tearing under nanoindenter scratches. Furthermore, laser-texturing on both PTFE coatings and the stainless steel substrate improved the coating wear life 29 times compared to the wear life of the control sample without any laser textures.

Published in Polymer Testing

ISSN: 0142-9418 (Print); 1873-2348 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Chemical technology: Polymers and polymer manufacture
Website: https://www.journals.elsevier.com/polymer-testing

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