Characterization of novel Ni–Al2O3–SiC nanocomposite coatings synthesized by co-electrodeposition

Abstract

In the present work, Ni-Al 2 O 3 , Ni-SiC and novel Ni-Al 2 O 3 -SiC metal matrix composite (MMC) coatings were electrodeposited onto pure copper samples using a modified Watt's nickel electroplating bath containing nano alumina and silicon carbide particles with an average particle size of 50 nm. The composition, crystalline structure and surface morphology of the deposits were characterized by X-ray diffractometry (XRD), energy-dispersive X-ray spectroscopy (EDS) and field emission scanning electron microscopy (FESEM). The results indicated that Ni-Al 2 O 3 -SiC hybrid composite films with an acceptable homogeneity and granular structure having 9.2 and 7.7 % vol. Al 2 O 3 and SiC nanoparticles, respectively were developed successfully. The nanoparticles incorporated in the nickel layer effectively increased the micro hardness and wear resistance owing to dispersion and grain-refinement strengthening, changing the nickel matrix morphology as well as the texture and preferred grain growth direction from \100[ to the close-packed \111[. The oxidation resistance of the Ni-Al 2 O 3 -SiC hybrid composite coatings was measured to be approximately 41 % greater than the unreinforced Ni deposit and almost 30 % better than the Ni-Al 2 O 3 composite coatings.

Pulsed electrodeposition of Ni-B/TiN composites: effect of current density on the structure, mechanical, tribological, and corrosion properties

“…This can be explained by the highest content of codeposited TiN particles in the Ni-B alloy matrix by supporting the nucleation areas of the crystals, preventing the growth of existing crystals, which is consentient with results reported by Mirzamohammadi et al [31]. The reduction of the crystallite size of the coating leads to the development of mechanical properties such as hardness and abrasion resistance [32]. The lattice distortions of samples produced at different current densities are shown in the Figure 3(c).…”

Reducing the wear and corrosion of the agricultural mower steel knives by electrodeposition nanocomposite coatings – Review

“…Vaezi et al [88], Studied the wear rate of the nanocomposite coating with incorporation Al 2 O 3 nanoparticle in metal matrix coating and the wear rate of nanocomposite coating was less than pure nickel and substrate copper. Figure 16 shows the results of wear test of the Ni-Al2O3-SiC nanocomposite coating with clearly observable reducing the wear rate for nanocomposite coating [99] Samuel Mbugua Nyambura et. al [86] Proved that Ni-W/Cr 2 O 3 nanocomposites exhibits superior .wear resistance properties compared to Ni-W binary alloy coatings.…”

Electrochemical Synthesis of Nanocomposites

“…For nickel matrix electrodeposits, a great variety of particles have been used such as oxides i.e. TiO 2 [41,42], Al 2 O 3 [43], CeO 2 [44,45], ZrO 2 [46], graphene oxide GO [47], carbon nanotubes CNT; Al 2 O 3 /Y 2 O 3 /CNT [48], carbides like SiC [49][50][51], WC [52] and nitrides such as TiN [53] and Si 3 N 4 [54].…”

“…SiC hybrid composite films with an acceptable homogeneity and granular structure having 9.2 and 7.7 % vol. Al 2 O 3 and SiC nanoparticles, respectively were developed successfully by M. Masoudi et al[50]. Both micro hardness and wear resistance increased owing to dispersion and grain-refinement strengthening of nanoparticles.…”