Combining Carbon Nanoparticle Coatings and Laser Surface Texturing for Enhanced Lubricity Under High Loads

IF 2.9 3区 工程技术 Q2 ENGINEERING, CHEMICAL Tribology Letters Pub Date : 2024-03-11 DOI:10.1007/s11249-024-01837-5
T. MacLucas, P. G. Grützmacher, P. Leonhard-Trautmann, S. Suarez, C. Gachot, F. Mücklich
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Abstract

Developing new lubrication concepts greatly contributes to improving the energy efficiency of mechanical systems. Nanoparticles such as those based on carbon allotropes or 2D materials have received widespread attention due to their outstanding mechanical and tribological performance. However, these systems are limited by a short wear life. Combining nanoparticle coatings with laser surface texturing has been demonstrated to substantially improve their durability due to the reservoir effect which prevents immediate particle removal from the contact. In this study, we investigate the high-load (20 N) tribological performance of AISI 304 austenitic stainless-steel substrates, which are line-patterned by laser interference patterning and subsequently coated with different carbon nanoparticle coatings (carbon nanotubes, carbon onions, carbon nanohorns) against alumina and 100Cr6 counter bodies. In addition to that, benchmark testing is performed with conventional solid lubricant coatings (graphite, MoS2, WS2). Electrophoretic deposition is used as the main coating technique along with air spraying (for WS2). All coatings substantially improve friction compared to the purely laser-patterned reference. Among all coating materials, carbon nanotubes demonstrate superior lubricity and the longest wear life against 100Cr6 and alumina counter bodies. Detailed characterization of the resulting wear tracks by energy-dispersive X-ray spectroscopy, scanning electron microscopy, and confocal laser scanning microscopy provides insights into the friction mechanisms of the various solid lubricant particles. Further, material transfer is identified as an important aspect for effective and long-lasting lubrication.

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将碳纳米颗粒涂层与激光表面纹理加工相结合,增强高负荷下的润滑性能
开发新的润滑概念大大有助于提高机械系统的能效。纳米粒子(如基于碳异构体或二维材料的纳米粒子)因其出色的机械和摩擦学性能而受到广泛关注。然而,这些系统受到磨损寿命短的限制。将纳米颗粒涂层与激光表面纹理加工相结合已被证明可大幅提高其耐久性,这是因为储层效应可防止颗粒立即从接触面上脱落。在本研究中,我们研究了 AISI 304 奥氏体不锈钢基体的高负荷(20 N)摩擦学性能,这些基体通过激光干涉图案化技术进行了线图案化,随后涂覆了不同的碳纳米粒子涂层(碳纳米管、碳葱、碳纳米角),与氧化铝和 100Cr6 对体进行了摩擦学试验。此外,还使用传统的固体润滑涂层(石墨、MoS2、WS2)进行了基准测试。电泳沉积和空气喷涂(WS2)是主要的涂层技术。与纯激光图案参照物相比,所有涂层都能显著改善摩擦性能。在所有涂层材料中,碳纳米管与 100Cr6 和氧化铝对撞体相比,润滑性更好,磨损寿命最长。通过能量色散 X 射线光谱学、扫描电子显微镜和共聚焦激光扫描显微镜对产生的磨损轨迹进行详细表征,可以深入了解各种固体润滑剂颗粒的摩擦机理。此外,材料转移被认为是有效和持久润滑的一个重要方面。
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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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