文献类型：期刊文献

中文题名：Enhanced Tribological Performance of Diamond Films by Utilizing DLC and DLC-H Top Layers

英文题名：Enhanced Tribological Performance of Diamond Films by Utilizing DLC and DLC-H Top Layers

作者：Lei, Xuelin[1]; Yan, Ying[1]; Zhang, Hang[1]; Li, Zixuan[1]; He, Yun[1]

机构：[1] School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2023

卷号：28

期号：5

起止页码：665

中文期刊名：Journal of Shanghai Jiaotong university(Science)

外文期刊名：Journal of Shanghai Jiaotong University (Science)

收录：EI(收录号：20215211396857);Scopus;PubMed

基金：the National Natural Science Foundation of China(No.51705155);the Tribology Science Fund of State Key Laboratory of Tribology(No.SKLTKF17B09)。

语种：英文

中文关键词：diamond film;diamond-like carbon(DLC);bilayer;tribology

外文关键词：Carbon films - Chemical vapor deposition - Diamond films - Diamond like carbon films - Friction - Hydrogenation - Wear of materials

摘要：High-performance diamond films are highly demanded on tool surfaces for wire-drawing and mechanical sealing applications.Herein,this work aims at enhancing the tribological performance of chemical vapor deposition diamond films in water-lubricated conditions by utilizing non-hydrogenated and hydrogenated diamond-like carbon(DLC and DLC-H)top layers.The tribological properties of bilayer micro-crystalline diamond(MCD)/DLC,MCD/DLC-H,nano-crystalline diamond(NCD)/DLC and NCD/DLC-H films are evaluated,in terms of maximal and stable coefficients of friction(COFs),C—C bonds transformation,worn surface morphology and specific wear rates.The results show that DLC or DLC-H coated on diamond layer significantly suppresses the initial maximal COF peak and the wear of counterpart ball.Moreover,severe regular arranged sp^(2) C—C bonds transformation is detected on MCD film,in comparison to NCD;while inversely,the NCD/DLC bilayer exhibits severer C—C bonds transformation effect compared with the MCD/DLC.Furthermore,the DLC-H top layer shows a larger decreasing rate of maximal COFs and wear rates of counterpart balls,compared with the DLC coating,which is due to its superior self-lubricity.Among all the tested films,the NCD/DLC-H bilayer shows an optimized tribological performance.
High-performance diamond films are highly demanded on tool surfaces for wire-drawing and mechanical sealing applications. Herein, this work aims at enhancing the tribological performance of chemical vapor deposition diamond films in water-lubricated conditions by utilizing non-hydrogenated and hydrogenated diamond-like carbon (DLC and DLC-H) top layers. The tribological properties of bilayer micro-crystalline diamond (MCD)/DLC, MCD/DLC-H, nano-crystalline diamond (NCD)/DLC and NCD/DLC-H films are evaluated, in terms of maximal and stable coefficients of friction (COFs), C-C bonds transformation, worn surface morphology and specific wear rates. The results show that DLC or DLC-H coated on diamond layer significantly suppresses the initial maximal COF peak and the wear of counterpart ball. Moreover, severe regular arranged sp 2 C-C bonds transformation is detected on MCD film, in comparison to NCD; while inversely, the NCD/DLC bilayer exhibits severer C-C bonds transformation effect compared with the MCD/DLC. Furthermore, the DLC-H top layer shows a larger decreasing rate of maximal COFs and wear rates of counterpart balls, compared with the DLC coating, which is due to its superior self-lubricity. Among all the tested films, the NCD/DLC-H bilayer shows an optimized tribological performance. ? 2021, Shanghai Jiao Tong University and Springer-Verlag GmbH Germany, part of Springer Nature.