等离子电解氧化涂层镁合金在石墨烯包裹的乙醇中的摩擦学性能

IF 3.1 3区 工程技术 Q2 ENGINEERING, MECHANICAL Lubricants Pub Date : 2023-12-28 DOI:10.3390/lubricants12010009
S. Bhowmick, F. Muhaffel, Shayan Shirzadian, Hüseyin Çimenoğlu, A. Alpas
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引用次数: 0

摘要

本研究使用含乙醇的石墨烯纳米颗粒(GNPs)作为润滑剂,研究了等离子电解氧化(PEO)涂层镁铝合金(AZ31)在与钢滑动接触时的摩擦和磨损特性。结果表明,在不含 GNP 的乙醇中进行滑动测试时,PEO 涂层表面在干滑动条件下的摩擦系数(COF)通常很高(0.74),而在不含 GNP 的乙醇中进行滑动测试时,摩擦系数则明显降低到 0.18。当乙醇中含有 5 × 10-4 重量百分比的 GNP 时,未涂层 AZ31 合金的 COF 进一步降至 0.17。PEO 涂层表面的 COF 明显降低到 0.07,磨损率也明显降低,这归功于石墨烯摩擦层的形成。这些发现凸显了掺入 GNP 的乙醇在改善 PEO 涂层 AZ31 的摩擦学性能方面的巨大潜力,为推进轻质、可持续和高效的汽车技术提供了一条大有可为的途径。
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Tribological Performance of a Plasma Electrolytic Oxidation-Coated Mg Alloy in Graphene-Incorporated Ethanol
This study investigated the friction and wear characteristics of a plasma electrolytic oxidation (PEO)-coated Mg–Al alloy (AZ31) in sliding contact against steel using graphene nanoplatelets (GNPs) containing ethanol as a lubricant. The results revealed that the typically high coefficient of friction (COF) of PEO-coated surfaces under dry sliding (0.74) was notably reduced to 0.18 during the sliding tests conducted in GNP-free ethanol. When the ethanol contained 5 × 10−4 wt.% GNPs, the COF of the uncoated AZ31 alloy further dropped to 0.17. The PEO-coated surfaces achieved a significantly lower COF of 0.07 and demonstrated a marked reduction in wear rate, attributed to the formation of a tribolayer incorporating graphene. These findings highlight the significant potential of GNP-incorporated ethanol to improve the tribological performance of PEO-coated AZ31, presenting a promising avenue for advancing lightweight, sustainable, and efficient automotive technologies.
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来源期刊
Lubricants
Lubricants Engineering-Mechanical Engineering
CiteScore
3.60
自引率
25.70%
发文量
293
审稿时长
11 weeks
期刊介绍: This journal is dedicated to the field of Tribology and closely related disciplines. This includes the fundamentals of the following topics: -Lubrication, comprising hydrostatics, hydrodynamics, elastohydrodynamics, mixed and boundary regimes of lubrication -Friction, comprising viscous shear, Newtonian and non-Newtonian traction, boundary friction -Wear, including adhesion, abrasion, tribo-corrosion, scuffing and scoring -Cavitation and erosion -Sub-surface stressing, fatigue spalling, pitting, micro-pitting -Contact Mechanics: elasticity, elasto-plasticity, adhesion, viscoelasticity, poroelasticity, coatings and solid lubricants, layered bonded and unbonded solids -Surface Science: topography, tribo-film formation, lubricant–surface combination, surface texturing, micro-hydrodynamics, micro-elastohydrodynamics -Rheology: Newtonian, non-Newtonian fluids, dilatants, pseudo-plastics, thixotropy, shear thinning -Physical chemistry of lubricants, boundary active species, adsorption, bonding
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