TY - JOUR
T1 - Textured coating or coated texture
T2 - Femtosecond laser texturing of a-C:H/WC coatings for dry friction applications
AU - Bondarev, Andrey
AU - Simonovic, Kosta
AU - Vitu, Tomas
AU - Kožmín, Pavel
AU - Syrovatka, Šimon
AU - Polcar, Tomas
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/9/25
Y1 - 2023/9/25
N2 - Laser texturing is a well-established method used to customize the tribological performance of PVD coatings. To achieve this enhancement, two distinct strategies can be employed: laser texturing of the substrates prior to coating deposition, or laser texturing of the already deposited coating. Technological and economic problems of tuning laser parameters for different types of substrates can be significantly eliminated by laser texturing of already coated materials. Nerveless, the effect of structural changes caused by laser ablation on friction performance is not well studied. In this work, we investigated the differences in these two strategies on example of commercially available a-C:H/WC gradient coatings. The XPS, FIB, SEM and EDS results revealed that femtosecond laser texturing causes minor oxidation and graphitization of the a-C:H/WC coatings but only in a few top nanometers. Macroscale dry tribological tests reveal no statistically significant difference in tribological performance between samples manufactured using two different strategies irrespective of pattern type and tribotest parameters. This means femtosecond laser texturing of the coated substrates can be implemented in industry as a rapid, cost-, and environment-friendly strategy.
AB - Laser texturing is a well-established method used to customize the tribological performance of PVD coatings. To achieve this enhancement, two distinct strategies can be employed: laser texturing of the substrates prior to coating deposition, or laser texturing of the already deposited coating. Technological and economic problems of tuning laser parameters for different types of substrates can be significantly eliminated by laser texturing of already coated materials. Nerveless, the effect of structural changes caused by laser ablation on friction performance is not well studied. In this work, we investigated the differences in these two strategies on example of commercially available a-C:H/WC gradient coatings. The XPS, FIB, SEM and EDS results revealed that femtosecond laser texturing causes minor oxidation and graphitization of the a-C:H/WC coatings but only in a few top nanometers. Macroscale dry tribological tests reveal no statistically significant difference in tribological performance between samples manufactured using two different strategies irrespective of pattern type and tribotest parameters. This means femtosecond laser texturing of the coated substrates can be implemented in industry as a rapid, cost-, and environment-friendly strategy.
KW - a-C:H
KW - DLC
KW - Dry friction
KW - Femtosecond laser texturing
KW - Tribology
UR - http://www.scopus.com/inward/record.url?scp=85165211057&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2023.129808
DO - 10.1016/j.surfcoat.2023.129808
M3 - Article
AN - SCOPUS:85165211057
SN - 0257-8972
VL - 469
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
M1 - 129808
ER -