不同深度沟槽纹理对水润滑条件下 GCr15-SiC 摩擦副的摩擦和磨损性能的影响

IF 2.9 3区 工程技术 Q2 ENGINEERING, CHEMICAL Tribology Letters Pub Date : 2024-10-23 DOI:10.1007/s11249-024-01926-5
Yusen Zhang, Wei Long, Yan Qiao, Puteng Gui, Yuting Yin, Haifeng Qian
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引用次数: 0

摘要

表面纹理是通过流体动力效应和二次润滑增强润滑和抗磨性能的有效技术。本研究设计了两种不同深度的沟槽纹理,以增强摩擦副的润滑性能。在理论分析的基础上,通过一系列实验对不同纹理产生的摩擦系数(COF)、磨损特性和三电开路电压进行了评估。利用摩擦测试装置、扫描电子显微镜、能量色散光谱仪、电度计(Keithley 6514)、拉曼光谱、表面微观形貌和润滑机制进行了揭示。首先,基于计算流体动力学设计了两种不同深度的沟槽纹理。其次,利用激光表面纹理技术制作了具有这些纹理的 SiC 样品,并进行了球盘旋转摩擦实验。在摩擦试验中,内浅外深(SDT)沟槽纹理在不同载荷下的中低速时表现出较低的 COF。最后,润滑机理被归结为四个因素的协同作用:润滑剂的流体动力效应、碎片排出能力的增强、界面上的氧化物三膜以及润滑剂和摩擦副之间的固液界面上产生的极化电场。结果表明,SDT 纹理的最小 COF 可降至 0.025。这些见解为提高机械系统中摩擦副的润滑和抗磨损性能的设计方法和新的润滑机制提供了宝贵的指导。 图文摘要
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Influence of Variable-Depth Groove Texture on the Friction and Wear Performance of GCr15–SiC Friction Pairs Under Water Lubrication

Surface texturing is an effective technology for enhancing lubrication and anti-wear properties through hydrodynamic effects and secondary lubrication. In this study, two types of variable-depth groove textures were designed to enhance the lubrication performance of friction pairs. Based on theoretical analysis, the coefficient of friction (COF), wear characteristics, and triboelectric open-circuit voltages produced by different textures were evaluated in a series of experiments. Using a friction testing setup, scanning electron microscopy, energy dispersive spectrometry, an electrometer (Keithley 6514), Raman spectroscopy, surface microtopography, and lubrication mechanisms were revealed. First, two types of variable-depth groove textures were designed based on computational fluid dynamics. Second, SiC samples with these textures were fabricated using laser surface texturing technology, and ball–disk rotary friction experiments were performed. During the friction tests, the shallow inner and deep outer (SDT) groove textures exhibited a lower COF at medium and low speeds under varying loads. Finally, the lubrication mechanism was attributed to the synergistic effect of four factors: the hydrodynamic effect of the lubricant, enhanced ability of debris expulsion, oxide tribofilms at the interface, and polarization electric field generated at the solid–liquid interfaces between the lubricant and friction pair. The results indicate that the minimum COF of the SDT texture can be reduced to 0.025. These insights offer valuable guidance for design methods and new lubrication mechanisms for enhancing the lubrication and anti-wear properties of friction pairs in mechanical systems.

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来源期刊
Tribology Letters
Tribology Letters 工程技术-工程:化工
CiteScore
5.30
自引率
9.40%
发文量
116
审稿时长
2.5 months
期刊介绍: Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.
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