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Open AccessArticle

Effects of Polyurethane Substrate Pre-Treatment on Pulsed Cathodic Arc Deposited DLC Films

by Lijie Zhang 1,2, Xuemei Zong 1,3, Xiaoming Yuan 1,2,3,* and Xiaolei Xing 1,*
1
Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, Yanshan University, Qinhuangdao 066004, China
2
The State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310058, China
3
Jiangsu Xuzhou Construction Machinery Research Institute Co., Ltd., Xuzhou 221004, China
*
Authors to whom correspondence should be addressed.
Coatings 2020, 10(6), 545; https://doi.org/10.3390/coatings10060545
Received: 18 May 2020 / Revised: 1 June 2020 / Accepted: 4 June 2020 / Published: 6 June 2020
Diamond-like carbon (DLC) films were deposited by means of pulsed cathodic arc deposition on pretreated polyurethane (PU) rubber substrates. Tetrachloroethylene was chosen as a dissolution method to remove the plasticizer added in the PU substrates. Scanning electron microscopy (SEM) and Raman spectroscopy were applied to observe and characterize the surface morphologies and compositions of the deposited films, respectively. The tribological behaviours of uncoated and coated rubbers were investigated with ring-on-disc tribo experiments under dry sliding conditions. The coefficients of friction (COFs) of the coated rubbers were 40% lower than those of uncoated rubber and the COFs of different samples decreased first and then increased slightly with the increase in temperature and the time of ultrasonic treatment under dry friction. Based on the above experiments, ultrasonic treatment with tetrachloroethylene contributes to the increase in the wear resistance of DLC films deposited on PU rubbers. The most suitable temperature and time of ultrasonic treatment with tetrachloroethylene is 50 °C for 15 min. View Full-Text
Keywords: DLC; polyurethane rubber; wear resistance; tetrachloroethylene DLC; polyurethane rubber; wear resistance; tetrachloroethylene
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Zhang, L.; Zong, X.; Yuan, X.; Xing, X. Effects of Polyurethane Substrate Pre-Treatment on Pulsed Cathodic Arc Deposited DLC Films. Coatings 2020, 10, 545.

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