Comparative Study of Tribological Characteristics of Al2O3 Coating Combined of Laser Surface Texturing and PTFE Solid Lubrication

IF 3.4 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Journal of Thermal Spray Technology Pub Date : 2026-07-07 DOI:10.1007/s11666-026-02290-7

Xubin Zhang, Wen Deng, Yazhen Zhang, Shuwen Sun, Mingbao Wang

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引用次数: 0

Abstract

Irregular dimples were prepared on the polished surface of an Al₂O₃ coating using laser texturing technology. Subsequently, the modified PTFE emulsion (M-PTFE) was infiltrated into the dimples via vacuum impregnation to obtain the Al₂O₃-PTFE composite coating. The microstructure and tribological behavior of the Al₂O₃-PTFE composite coating were systematically characterized and compared with those of the Al₂O₃ coating. The results demonstrated that M-PTFE successfully penetrated into the bottom of the textured dimples. Compared with the Al₂O₃ coating, the Al₂O₃-PTFE composite coating formed a continuous and stable PTFE lubricating film during the sliding process, which endowed it with outstanding friction-reducing and wear-resistant characteristics. The friction coefficient of the Al₂O₃-PTFE composite coating (0.08) was approximately 7 times lower than that of the Al₂O₃ coating (0.57). The wear rate of the Al₂O₃-PTFE composite coating after 2.5 × 10⁵ sliding cycles was 4.36 × 10⁻⁸ mm³(N⋅m)^− 1, representing a reduction of four orders of magnitude compared with that of the Al₂O₃ coating (2.53 × 10⁻⁴ mm³(N⋅m)^− 1) measured after 2 × 10⁴ cycles. Furthermore, the Al₂O₃ counterface ball sliding against the Al₂O₃-PTFE composite coating exhibited minimal surface degradation. This approach effectively bridges the gap between the hardness of ceramics and the lubrication requirements, offering a scalable and cost-effective solution for industrial applications where dry sliding performance is critical.

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激光表面织构与PTFE固体润滑复合Al2O3涂层摩擦学特性的比较研究

采用激光织构技术，在抛光后的Al2O3涂层表面制备了不规则的酒窝。随后，将改性后的PTFE乳液（M-PTFE）真空浸渍渗透到韧窝中，得到Al2O3-PTFE复合涂层。系统表征了Al2O3- ptfe复合涂层的微观组织和摩擦学性能，并与Al2O3涂层进行了比较。结果表明，M-PTFE成功渗透到织构凹窝的底部。与Al2O3涂层相比，Al2O3-PTFE复合涂层在滑动过程中形成连续稳定的PTFE润滑膜，具有优异的减摩耐磨特性。Al2O3- ptfe复合涂层的摩擦系数（0.08）比Al2O3涂层的摩擦系数（0.57）低约7倍。经过2.5 × 105次滑动循环后，Al2O3- ptfe复合涂层的磨损率为4.36 × 10−8 mm3(N·m)−1，比经过2 × 104次滑动循环后的Al2O3涂层的磨损率（2.53 × 10−4 mm3(N·m)−1）降低了4个数量级。此外，在Al2O3- ptfe复合涂层上滑动的Al2O3正面球表现出最小的表面降解。这种方法有效地弥合了陶瓷硬度和润滑要求之间的差距，为干滑动性能至关重要的工业应用提供了可扩展且具有成本效益的解决方案。

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

Journal of Thermal Spray Technology 工程技术-材料科学：膜

CiteScore

5.20

自引率

25.80%

发文量

198

审稿时长

2.6 months

期刊介绍： From the scientific to the practical, stay on top of advances in this fast-growing coating technology with ASM International''s Journal of Thermal Spray Technology. Critically reviewed scientific papers and engineering articles combine the best of new research with the latest applications and problem solving. A service of the ASM Thermal Spray Society (TSS), the Journal of Thermal Spray Technology covers all fundamental and practical aspects of thermal spray science, including processes, feedstock manufacture, and testing and characterization. The journal contains worldwide coverage of the latest research, products, equipment and process developments, and includes technical note case studies from real-time applications and in-depth topical reviews.