Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

Study the Effect of Different Electrodes, Suspension Conductivity and Cell Resistivity, on Yield of EPD in Nano Alumina Suspension

Authors
Mostafa Milani 1
Syed Mohammad Mirkazemi 2
Syed Mohammad Zahraee 3
1 Iranian Research Organization of Science and Technology, Department of Advanced Materials and Renewable
2 Iranian University of Science and Technology, Material and Metallurgy faculty, Tehran, Iran.
3 Iranian Research Organization of Science and Technology, Department of Advanced Materials and Renewable Energies, Tehran, Iran
10.30501/jamt.2017.70334
Abstract
Electrophoretic deposition process as a high-speed process of ceramic body shaping has received great attention in recent years. Suspension conductivity and electrical resistance of the EPD cell as two main parameters in the expression of various kinetic models have been influential. Electrical variation in suspension and deposit had more attraction to change these parameters. While electrodes as a part of electrical system could change conductivity and resistivity. Present study is an endeavor to highlight less mentioned parameter, an electrode material, which could change the EPD models. The experiments were carried out based on aluminum, titanium, stainless steel, copper and graphite electrodes and alumina nano powders. The experiments have shown that the anode material (in cathode deposition) could change EPD models' constants and graphite anodes have same deposition weight in experiment and model. While anodizing of aluminum, with presence of electrical current, deviated results to 0.35. Conductivity based models can predict yield of process better than resistivity based models, since less influencing from electrode material and resistivity of cell. So, we developed a new model based on Ferrari et al.'s model.
Keywords
kinetic equations
Alumina nano powder
suspension conductivity
Cell resistivity
Electrophoretic deposition
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  • Receive Date 14 November 2016
  • Revise Date 28 November 2016
  • Accept Date 11 January 2017