Diamond-dispersed electroless nickel coatings

Effect of Sodium Dodecyl Sulphate on the Composition of Electroless Nickel – Yttria Stabilized Zirconia Coatings

“…In fact, examination of coatings carried out with 100 g/l YSZ bath loading, which showed a thickness of only about 2 µm, is evidence that the YSZ powder formed an almost complete barrier to nickel adsorption on the surface. Sheela and Pushpavanam [5] who studied electroless nickel-diamond coatings and Balaraju, et al [22] who investigated electroless Ni-P composite coatings also observed a similar trend. The latter suggests that the emergent pattern could be ascribed to the possibility of grouping or agglomeration of second phase particles resulting from a decrease in the mean distance between them.…”

“…Although Brenner & Riddell are credited with developing the process [1,2], Odekerken who while attempting to improve the corrosion resistance of nickel chromium electrodeposits, applied an intermediate layer of alumina (Al 2 O 3 ) and poly vinyl chloride (PVC) within a metal matrix, is widely acknowledged as the earliest demonstrator of particulate matter incorporation by ENP [3,4]. Since then, numerous studies such as those of Sheela & Pushpavanam [5] who adopted the technique to synthesise high wear resistant diamond-nickel composite coatings, have been carried out to establish potential applications for the technology.…”

YSZ Reinforced Ni-P Composite by Electroless Nickel Co-Deposition

“…Particle loading is the amount of powder particles in a litre solution. Co-depositing very fine polycrystalline diamond ranging between 8 and 12 µm with varying concentrations from 2-10 g/l onto aluminium substrate at 70-90 o C for an hour yielded as high as 18.40 vol.% diamond powder in the deposit (Sheela and Pushpavanam 2002). The particle incorporation in a Ni-P-ZrO2 EN system was found to be directly proportional to increase particle loading up to 9 g/l as well as the deposition rate (Shibli, Dilimon et al 2006).…”

Electroless Deposition of Composite Nickel-Phosphorous Coatings with Diamond Dispersoid

“…Composite coatings with incorporated diamond particles into the metal matrix have the aim to improve the hardness, corrosion and wear-resistance, as well as other properties of the coatings [6][7][8]. Even small amounts of dispersoid in the composite coating may improve the latter's wear resistance and they are less expensive as compared to solid chromium at that and adequate tribological properties.…”

“…Even small amounts of dispersoid in the composite coating may improve the latter's wear resistance and they are less expensive as compared to solid chromium at that and adequate tribological properties. Shortcomings to the production of these coatings include reduced electrolyte stability and increased costs [8][9][10][11][12][13].…”