LAUSR

Abstract Thermal sprayed aluminum (Al) coatings have been extensively utilized for marine anticorrosion applications. However, lack in mechanical strength of the coatings persists as a big concern for their long-term service in harsh marine environment. In this study, nanodiamond (ND) reinforced Al metal matrix composite coatings with enhanced mechanical properties were fabricated by flame spraying the mixture of micron-sized Al powder and ND suspension for the first time. Microstructural characterization and assessment of mechanical/corrosion properties of the Al-ND composite coatings were conducted. Results show that the coatings with perfectly retained ND exhibit reduced porosity and increased hardness, exhibiting remarkably enhanced anti-corrosion and anti-wear performances. The study presents a promising way to develop ND reinforced metal matrix composite coatings for potential marine applications.