Enhancing tribological performance by anodizing micro-textured surfaces with nano-MoS2 coatings prepared on aluminum-silicon alloys. (June 2018)

• Record Type: Journal Article
• Authors: Chen, Luanxia; Liu, Zhanqiang; Shen, Qi
• Is Part Of: Tribology international. Volume 122(2018)
• Page Start: 84
• Page End: 95
• Publication Date: 2018-06
• Subjects: Micro-textures -- Anodizing -- Nano-MoS2 coatings -- Friction; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2018.02.039
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: Aluminum-silicon alloys exhibit poor tribological performance and suffer from severe adhesive wear. The single surface treatment has demonstrated unsatisfactory anti-friction performances. In this paper, the synergistic effect of the surface micro-texturing and nano-solid lubricant improved the tribological performance of aluminum-silicon alloys effectively. The anodizing micro-textured surface with nano-MoS2 coatings was fabricated by micro-milling, anodizing and ultrasonic impregnation. Pin-on-disc tribological tests revealed that the friction coefficient of the anodizing micro-textured surface with nano-MoS2 coatings decreased by 22.6% compared with that of the untextured specimen. The anti-friction characteristic was attributed to the synergistic effect of the entrapping wear debris of dimple structure, the high hardness of porous anodic aluminum oxide films and the self-lubricating property of nano-MoS2 coatings. Graphical abstract: Image 1 Highlights: Self-lubricating porous anodic films with nano-MoS2 particles were fabricated using anodization and ultrasonic impregnation. Tribological performance of untextured, micro-textured, anodizing micro-textured surfaces, and nano-MoS2 coatings was analyzed. Surface micro-texturing and nano-MoS2 coatings exhibited synergistic effects on improving surface tribological performance.