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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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.