Electroless Deposition of Composite Nickel-Phosphorous Coatings with Diamond Dispersoid

Abstract

Polyethylene terephthalate (PET) samples with a surface area of 8 сm 2 were used for these investigations. The samples were pre-treated employing the following technological scheme [14][15]: Etching in alkaline solution OA-84-2 (a commercial product of Technical University-Sofia) at T = 65 ˚C and τ = 15 min; Pre-activation in 3М HCl at T = 25 ˚C and τ = 5 min; Activation in colloidal solution of PdCl 2 A-75-12 (a commercial product of Technical University-Sofia) at T = 25 ˚C and τ = 5 min, and Acceleration in alkaline solution Arch. Metall. Mater., Vol. 61 (2016) ELECTROLESS DEPOSITION OF COMPOSITE NICKEL-PHOSPHOROUS COATINGS WITH DIAMOND DISPERSOIDThe composite Ni-P coating with diamond particles (D) deposited on the flexible substrates of pressed polyethylene terephthalate material (PET) was obtained, to be used in the development of efficient, flexible grinding and polishing tools. The optimal conditions of the hydrodynamic regime, deposition time and temperature were found. The influence of the concentration and size of the D particles (3/7 ÷ 225/300 μm) on the coating thickness and number of co-deposited particles were studied. By Scanning Electron Microscopy (SEM) images were defined the morphology of dispersion coatings and number of co-deposited particles in them, and Energy Dispersive Spectroscopy (EDS/INCA) was used to determine the elemental chemical composition of the composite coatings.

Archives of Metallurgy and Materials

“…The materials produced in this way are characterized by much better mechanical, corrosion and tribological properties, as evidenced by literature reports. In the works [1][2][3], graphite was used as dispersion phase for producing nanocomposite coatings, while in [4][5][6][7][8] the coating materials were reinforced with diamond nanoparticles. Moreover, studies reported in [9][10][11] are aimed on the nanocomposite materials with carbon nanotubes as the dispersion phase.…”