Effect of ultrasonic nanocrystal surface modification on fuel-lubricated wear mechanisms of thermal spray Al2O3-TiO2 coating

IF 5.3 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear Pub Date : 2025-02-05 DOI:10.1016/j.wear.2025.205882

Auezhan Amanov , Stephen P. Berkebile

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引用次数: 0

Abstract

In this study, an Al₂O₃-TiO₂ (87%–13 %) coating was deposited onto a hardened SAE 52100 bearing steel using a high-velocity oxygen fuel (HVOF) spraying deposition method to enhance surface durability. The Al₂O₃-TiO₂ composite coatings generally exhibit better properties than pure Al₂O₃ coatings. To further improve wear resistance, the Al₂O₃-TiO₂ coating was subjected to ultrasonic nanocrystal surface modification (UNSM) treatment. The effects of UNSM treatment on the microstructure and hardness of the coating were investigated by scanning electron microscopy (SEM), electron-backscattered diffraction (EBSD), X-ray diffraction (XRD), and nanoindentation. The sliding friction and wear resistance of the coatings were assessed using a reciprocating ball-on-disk micro-tribometer under fuel-lubricated (F-24 jet fuel) conditions against an SAE 52100 bearing steel ball. The experimental tribological test results indicated that UNSM-treated coatings exhibited a reduced friction coefficient and enhanced wear resistance compared to untreated coatings. Detailed wear track analysis provided insights into wear degradation mechanisms and elucidated the role of UNSM treatment in improving the fuel-lubricated wear behavior of Al₂O₃-TiO₂ coatings.

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超声纳米晶表面改性对热喷涂Al2O3-TiO2涂层燃料润滑磨损机理的影响

在这项研究中，采用高速氧燃料（HVOF）喷涂沉积方法将Al2O3-TiO2（87% - 13%）涂层沉积在硬化的sae52100轴承钢上，以提高表面耐久性。Al2O3- tio2复合涂层通常表现出比纯Al2O3涂层更好的性能。为了进一步提高Al2O3-TiO2涂层的耐磨性，对其进行了超声纳米晶表面改性（UNSM）处理。采用扫描电镜（SEM）、电子背散射衍射（EBSD）、x射线衍射（XRD）和纳米压痕技术研究了UNSM处理对涂层显微组织和硬度的影响。在燃料润滑（F-24喷气燃料）条件下，使用往复式球盘式微摩擦计对sae52100轴承钢球进行了滑动摩擦和耐磨性评估。实验摩擦学测试结果表明，与未处理涂层相比，unsm处理涂层的摩擦系数降低，耐磨性增强。详细的磨损轨迹分析揭示了磨损降解机制，阐明了UNSM处理在改善Al2O3-TiO2涂层燃料润滑磨损行为中的作用。

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

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.