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- Title
Nitrogen-Doped Diamond-like Carbon Buffer Layer Enhances the Mechanical and Tribological Properties of Diamond-like Carbon Films Deposited on Nitrile Rubber Substrate.
- Authors
Song, Yinqiao; Han, Changxin; Zhen, Nini; Wang, Yukai; Leng, Yongxiang; Wu, Zhiyu; Deng, Qiaoyuan; Wen, Feng
- Abstract
The poor adhesion between the DLC film and rubber restricts its application of seals. Introducing a suitable interlayer can bolster the adhesion of the coating or film. In this study, nitrogen-doped diamond-like carbon (N-DLC) emerged as the optimal intermediate layer between rubber and DLC. A series of N-DLC/DLC multilayer films were fabricated via DC magnetron sputtering on nitrile rubber (NBR) substrates, varying the substrate bias voltage (0 V, 100 V, 200 V). A scanning electron microscopy analysis revealed that the composite film surface was smoother than the DLC film alone. The results of Raman spectroscopy and X-ray photoelectron spectroscopy indicated a robust bond between nitrogen and carbon atoms in the composite film, with nitrogen facilitating the conversion of sp3C-C bonds into sp2C=C. Mechanical tests demonstrated that the N-DLC interlayer improved film adhesion and reduced the CoF of the composite film to 0.2–0.3. Specifically, the CoF of the N-DLC/DLC film prepared at 100 V was as low as 0.20, with a wear amount of 1.13 mg. Consequently, the inclusion of the N-DLC interlayer substantially enhanced the mechanical and tribological properties of DLC-coated NBR, rendering this coating highly advantageous for various applications.
- Subjects
DIAMOND-like carbon; NITRILE rubber; BUFFER layers; DOPING agents (Chemistry); X-ray photoelectron spectroscopy; ADHESION; CARBON films
- Publication
Coatings (2079-6412), 2024, Vol 14, Issue 4, p515
- ISSN
2079-6412
- Publication type
Article
- DOI
10.3390/coatings14040515