The microstructure and optical properties of novel Al₂O₃–Ag composite coating

Abstract

In this research, the microstructure and optical behaviour of a novel Al 2 O 3 -Ag composite coating have been investigated. The composite films were synthesised by the addition of silver nanoparticles into the anodizing electrolyte solution with the concentration of 100-1500 mg per 600 mL. SEM, EDS, XRD and Raman tests were employed to study the microstructure of the coatings. The optical properties were also characterized by FTIR and UV-Vis experiments. The results showed that the average pore diameter was increased by the co-deposition of silver nanoparticles into the alumina matrix from about 11 to 41 nm. Furthermore, silver nanoparticles could improve the optical properties of the anodic film, whereas the composite coating showed the higher absorption and emission associated with the ratio of α/ε ∼ 1.

Wear behaviour of different nano particles coating on Al6061 substrate

“…Table 2 gives the details of the working parameters of the electrodeposition process. The electrolyte solution for the electrodeposition process is prepared as per watts bath standard for Ni coatings [28,29]. During the electrodeposition process, the substrate is connected to negative terminal whereas the Ni is connected to the positive terminal of the rectifier.…”

The effect of pre-heat and post-heat treatment on the hardness and blackening process of electroless NiP deposits on titanium alloy

“…The thickness of coatings affects solar absorption. The absorption coefficient increases for thicker coatings; this means that the minimum thickness of coating should be as thick as the depth of light penetration [21]. Due to the higher sediment rate and the greater thickness of the coating with preparation operation, the absorption coefficient of the sample was prepared with the nitric acid, and the fluoric acid solution was about 0.95.…”