Lantern-inspired integrated multi-biomimetic microstructure for efficiently improving tribological performance of cemented carbide under green lubrication

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear Pub Date : 2025-10-02 DOI:10.1016/j.wear.2025.206368

Yunpeng Ma, Xiaobin Cui, Ying Niu, Daohui Xiang, Feng Jiao, Pingmei Ming

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Abstract

Vegetable oil-based minimum quantity lubrication (VMQL) is a green lubrication method limited in improving lubrication at friction interfaces. The introduction of integrated multi-biomimetic microstructure (IMM) on cemented carbide surface is expected to efficiently improve tribological performance under VMQL conditions. Inspired by lanterns' layered integration, we integrated four biomimetic microstructures vertically and horizontally using a wear-resistant biomimetic microstructure as the basic frame. Four IMM with different wettability were obtained: superlipophilic IMM (IMM-L), superoleophobic IMM (IMM-O), IMM with superlipophilic upper and superoleophobic lower surface (IMM-LO), and IMM with superoleophobic upper and superlipophilic lower surface (IMM-OL). We investigated the morphology and wettability behavior of the IMM. Influences of load, sliding speed, and lubricant flow rate on the average coefficient of friction (COF) and wear rate of cemented carbide with and without IMM were analyzed. The integration methods' effects on tribological performance were analyzed, and the optimal area ratio (defined as the upper-to-lower surface area ratio) for the best IMM was investigated. We revealed the influencing mechanism of the integration methods on the tribological performance improvement. IMM incorporated features of various biomimetic microstructures. The integration method significantly affected surface energy distribution, causing differences in surface superwettability. Surfaces with IMM showed much better tribological performance compared to conventional surfaces. The average COF decreased by 18.2 %–54.5 %, while wear rate reduction ranged from 31.7 % to 60.9 %. IMM-LO offered the largest reduction, with optimal tribological performance achieved at an area ratio of 1.2, owing to its unique superwettability distribution enhancing hydrodynamic pressure effect and lubricant-transport efficiency.

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绿色润滑下高效提高硬质合金摩擦学性能的lantern型集成多仿生微观结构

植物油基最小量润滑（VMQL）是一种绿色润滑方法，仅限于改善摩擦界面的润滑。在硬质合金表面引入集成的多仿生微观结构（IMM）有望有效改善VMQL条件下的摩擦学性能。受灯笼分层整合的启发，我们使用耐磨的仿生微观结构作为基本框架，在垂直和水平方向上整合了四个仿生微观结构。得到了4种不同润湿性的IMM：超亲脂IMM （IMM- l）、超疏油IMM （IMM- o）、超亲油上表面和超疏油下表面的IMM （IMM- lo）和超疏油上表面和超亲油下表面的IMM （IMM- ol）。我们研究了IMM的形态和润湿性行为。分析了载荷、滑动速度和润滑油流量对含和不含IMM硬质合金平均摩擦系数和磨损率的影响。分析了集成方法对摩擦学性能的影响，并探讨了最佳IMM的最佳面积比（定义为上下表面积比）。揭示了集成方法对摩擦学性能改善的影响机理。IMM结合了各种仿生微结构的特征。积分法显著影响表面能分布，造成表面超润湿性差异。与传统表面相比，具有IMM的表面具有更好的摩擦学性能。平均COF降低18.2% ~ 54.5%，磨损率降低31.7% ~ 60.9%。由于IMM-LO独特的超润湿性分布增强了动水压力效应和润滑油输送效率，其减少量最大，在面积比为1.2时达到最佳摩擦学性能。

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来源期刊

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.