Enhancing the tribological performance of polycrystalline diamond compact in water-based drilling fluids by mimicking the rhombic grid texture of shark skin

IF 4.7 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Refractory Metals & Hard Materials Pub Date : 2026-06-01 Epub Date: 2026-01-14 DOI:10.1016/j.ijrmhm.2026.107674

Lei Chen , Xuejiao Sun , Yanbo Ding , Baochang Liu

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Abstract

In this study, the abrasive wear in open-structure polycrystalline diamond compact (PDC) thrust bearings was reduced by applying a shark skin-inspired rhombic grid texture to the bearing surface. The influence of the groove angle of the texture on the tribological performance of a PDC/Si₃N₄ pair was investigated under lubrication with a water-based drilling fluid. Friction tests revealed that a groove angle of 45° optimized tribological performance, enhancing surface wettability by 45.27% (contact angle: 36.45°) and reducing the coefficient of friction (COF) by 57.35% (COF: 0.07541). This texture formed a continuous lubricating film, trapped abrasive debris, and stored the drilling fluid. Thus, the three-body and adhesive wear were effectively mitigated, and the lubrication was enhanced. The biomimetic design presented a viable solution for extending the service life and reliability of diamond bearings in harsh downhole environments.

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通过模拟鲨鱼皮的菱形网格纹理，增强聚晶金刚石致密体在水基钻井液中的摩擦学性能

在这项研究中，通过在轴承表面施加鲨鱼皮启发的菱形网格纹理，减少了开放式结构聚晶金刚石紧凑型（PDC）推力轴承的磨粒磨损。在水基钻井液润滑条件下，研究了织构槽角对PDC/Si₃N₄副摩擦学性能的影响。摩擦试验结果表明，当沟槽角为45°时，表面润湿性提高45.27%（接触角为36.45°），摩擦系数（COF）降低57.35% （COF为0.07541）。这种结构形成了连续的润滑膜，捕获了磨料碎屑，并储存了钻井液。因此，有效地减轻了三体磨损和粘着磨损，增强了润滑。这种仿生设计为延长金刚石轴承在恶劣井下环境下的使用寿命和可靠性提供了可行的解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

$International Journal of Refractory Metals & Hard Materials$

International Journal of Refractory Metals & Hard Materials 工程技术-材料科学：综合

CiteScore

7.00

自引率

13.90%

发文量

236

审稿时长

35 days

期刊介绍： The International Journal of Refractory Metals and Hard Materials (IJRMHM) publishes original research articles concerned with all aspects of refractory metals and hard materials. Refractory metals are defined as metals with melting points higher than 1800 °C. These are tungsten, molybdenum, chromium, tantalum, niobium, hafnium, and rhenium, as well as many compounds and alloys based thereupon. Hard materials that are included in the scope of this journal are defined as materials with hardness values higher than 1000 kg/mm2, primarily intended for applications as manufacturing tools or wear resistant components in mechanical systems. Thus they encompass carbides, nitrides and borides of metals, and related compounds. A special focus of this journal is put on the family of hardmetals, which is also known as cemented tungsten carbide, and cermets which are based on titanium carbide and carbonitrides with or without a metal binder. Ceramics and superhard materials including diamond and cubic boron nitride may also be accepted provided the subject material is presented as hard materials as defined above.