The correlation between the grain size of electrodeposited coatings and the current densities was modeled by considering galvanostatic conditions. In order to test the model by experimental results, nanocrystalline (NC) nickel samples were deposited at different current densities using a Watts bath. The grain size of the deposits was evaluated by X-ray diffraction (XRD) technique. Model predictions were validated by finding a curve being the best-fit to the experimental results which were gathered from literature for different NC coatings in addition to those data measured in this research for NC nickel coatings. According to our model, the variation of grain size with the reciprocal of the current density follows a power law. A good agreement between the experimental results and model predictions was observed which indicated that the derived analytical model is applicable for producting the nanocrystalline electrodeposits with the desired grain size by controling current density.
参考文献
| [1] | C. A. Schuh;T. G. Nieh;T. Yamasaki .Hall-Petch breakdown manifested in abrasive wear resistance of nanocrystalline nickel[J].Scripta materialia,2002(10):735-740. |
| [2] | H. Natter;R. Hempelmann .Nanocrystalline Metals Prepared by Electrodeposition[J].Zeitschrift fur Physikalische Chemie: International Journal of Research in Physical Chemistry and Chemical Physics,2008(2/3):319-354. |
| [3] | O. Sancakoglu;O. Culha;M. Toparli;B. Agaday;E. Celik .Co-deposited Zn-submicron sized A1_2O_3 composite coatings: Production,characterization and micromechanical properties[J].Materials & design,2011(7):4054-4061. |
| [4] | S. T. Aruna;S. Diwakar;A. Jain .Comparative study on the effect of current density on Ni and Ni-Al_2O_3 nanocomposite coatings produced by electrolytic deposition[J].Surface Engineering,2005(3):209-214. |
| [5] | A. Godon;J. Crews;X. Feaugas .Characterization of electrodeposited nickel coatings from sulphamate electrolyte without additive[J].Materials Characterization,2011(2):164-173. |
| [6] | S. Ghanbari;F. Mahboubi .Corrosion resistance of electrodeposited Ni-Al composite coatings on the aluminum substrate[J].Materials & design,2011(4):1859-1864. |
| [7] | E. Moti;M.H. Shariat;M.E. Bahrololoom .Electrodeposition Of Nanocrystalline Nickel By Using Rotating Cylindrical Electrodes[J].Materials Chemistry and Physics,2008(2/3):469-474. |
| [8] | M. Y. Abyaneh;M. Fleischmann .Extracting nucleation rates from current-time transients Part II: comparing the computer-fit and pre-pulse method[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,2002(1/2):89-95. |
| [9] | M. Palomar-Pardave;B. R. Scharifker;E. M. Arce;M. Romero-Romo .Nucleation and diffusion-controlled growth of electroactive centers Reduction of protons during cobalt electrodeposition[J].Electrochimica Acta,2005(24):4736-4745. |
| [10] | O.Yevtushenko;H.Natter;R.Hempelmann .Influence of bath composition and deposition parameters on nanostructure and thermal stability of gold[J].Journal of solid state electrochemistry,2007(2):138-143. |
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