Effect of hydrogenation or not of DLC on its tribological properties in vapor and liquid methanol

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2025-03-17 DOI:10.1016/j.diamond.2025.112218

Zhenguo Lai , Panfeng Yang , Bin Zhang , Yongming Zhu , Kaixiong Gao

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引用次数: 0

Abstract

Green methanol as a fuel can effectively solve energy shortage and reduce air pollution. However, its lubrication failure caused in internal combustion engine systems is a shortcoming. In this study, we investigate the tribological properties of diamond-like carbon (DLC) and hydrogenated diamond-like carbon film (HDLC) in vapor methanol and liquid methanol against ceramic ball in view of different states of methanol working in different components. The results showed that the tribological performance of DLC in vapor methanol was better than that of HDLC, with Si₃N₄ vs. DLC having the best tribological performance (friction coefficient (COF) is 0.068 and wear rate is 0.33 × 10⁻⁸ mm³/N·m). While HDLC in liquid methanol has better tribological performance than DLC, in which Si₃N₄ vs. HDLC is the best (COF is 0.061 and wear rate is 0.89 × 10⁻⁸ mm³/N·m). In addition, it was found that no transfer film was formed on the wear scar in both states. SEM and EDS mapping characterization of the wear debris revealed that the tribological properties of the carbon films in vapor methanol were mainly dominated by the degree of graphitization of the wear debris, whereas in liquid methanol they were highly correlated with the oxygen content of the wear debris. This study can be instructive for the design of methanol internal combustion engine systems.

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.