Self-Lubricating SiC/PTFE Composite Coating Formation on Surface of Aluminium Alloy

Abstract:

Anodized composite films containing n-SiC and PTFE particles are prepared on 2024 Al alloy by anodization in phosphoric acid-base electrolyte and ultrasonic impregnation and subsequent heat treatment. Results show that the oxide film microhardness increase with n-SiC content and ultrasonic impregnation time increase, the oxide film wear extent decrease with n-SiC and PTFE content increase basically. The composite films formed on optimum conditions have reduced friction coefficients and relatively high microhardness. The friction coefficient can be as small as 0.14, while the microhardness can reach as high as 429 HV, which is much better than that of an oxide film prepared under the same conditions but without adding any particles. This indicates that the synthesized composite films have good anti-wear and self-lubricating properties

• Periodical: Advanced Materials Research (Volumes 490-495)
• Pages: 3511-3515
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.490-495.3511
• Online since: March 2012
• Authors: Ming Hua Chen, Kai Chang Kao, Ming Wu Tu, Dong Na Zhang
• Keywords: Anodization, n-SiC, PTFE, Self-Lubricating, Ultrasonic Impregnation

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