Codeposition of SiC Particles with Electrolytic Nickel
Ni/SiC composite coatings were produced by electrodeposition from chloride-sulphate bath. The effect of SiC concentration on the percentage of embedded particles at two current densities (0.75 and 1.50 A·dm-2) was determined. SiC content in the nickel matrix was in the range of 13-23 vol%, but lower values were found for higher current density. Increased particles contents in the coatings practically did not change microhardness of deposits (approximately 300 HV), but it increased corrosion resistance. Morphology and particle distribution in the deposits was studied with optical and transmission electron microscopes. Specific surface charge of SiC particles as well as adsorption of Ni2+ions on the powder particles were also determined.
E. Broszeit, Mechanical, thermal and tribological properties of electro- and chemodeposited composite coatings, Thin Solid Films 95, 133-142 (1982).
S.W. Watson, Electrochemical study of SiC particle occlusion during nickel electrodeposition, J. Electrochem. Soc. 140(8), 2235-2238 (1993).
K.M. Ibrahim, A.A. Aal, Z.A. Hamid, Enhanced wear resistance of cast ductile iron by Ni-SiC composite coating, Int. J. Cast Met. Res. 18(5), 318-320 (2005).
E.A. Pavlatou, M. Stroumbouli, P. Gyftu, N. Spyrellis, Hardening effect induced by incorporation of SiC particles in nickel electrodeposits, J. Appl. Electrochem. 36, 385-394 (2006).
T-S. Oh, J-H. Lee, J-Y. Byun, T-S. Oh, Effects of the additives and current density on the electrodeposition behavior and mechanical properties of the Ni-SiC composite coatings, Key Eng. Mat. 345-346, 1533-1536 (2007).
J. Celis, J.R. Roos, C. Buelens, A mathematical model for the electrolytic codeposition of particles with a metallic matrix, J. Electrochem. Soc. 134 (6), 1402-1408 (1987).
L.S Čerović, S.K. Milonjić, M.B. Todorović, M.I. Trtanj, Y.S. Pogozhev, Y. Blagoveschenskii, E.A. Levashov, Point of zero charge of different carbides, Coll. Surf. A 297, 1-6 (2007).
C. Önneby, C.G. Pantano, Silicon oxycarbide formation on SiC surfaces and at the SiC/SiO2 interface, J. Vac. Sci. Technol. A 15(3), 1597-1602 (1997).
A. Grosjean, M. Rezrazi, M. Tachez, Influence of nickel ions on the surface charge of silicon carbide (SiC) particles for elaboration of nickel-SiC electroless composite deposits, Ann. Chim. Sci. Mat. 23, 401-407 (1998).
S.H. Yeh, C.C. Wan, Codeposition of SiC powders with nickel in a Watts bath, J. Appl. Electrochem. 24, 993-1000 (1994).