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Cathodic electrophoretic deposition of α-Fe_2O_3 coating

Cathodic electrophoretic deposition of α-Fe_2O_3 coating
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摘要 Submicro α-Fe2O3 coatings were formed using electrophoretic deposition(EPD) technique in aqueous media. The zeta potentials of different α-Fe2O3 suspensions with different additives were measured as a function of p H to identify the optimum suspension condition for deposition. Electrophoretic depositions of α-Fe2O3 coatings under different applied electric fields and deposition time were studied and the effects of applied voltages and deposition time on deposition rates and thicknesses were investigated. The particle packing densities of the deposits at various applied voltages and deposition time were also analyzed by a scanning electron microscope(SEM). The results show that crack-free α-Fe2O3 coatings with uniform microstructure and good adherence to the nickel substrates are successfully obtained. Electrophoretic deposited α-Fe2O3 coating from aqueous suspension is a feasible, low-cost and environmental friendly method. Submicro α-Fe2O3 coatings were formed using electrophoretic deposition（EPD） technique in aqueous media. The zeta potentials of different α-Fe2O3 suspensions with different additives were measured as a function of p H to identify the optimum suspension condition for deposition. Electrophoretic depositions of α-Fe2O3 coatings under different applied electric fields and deposition time were studied and the effects of applied voltages and deposition time on deposition rates and thicknesses were investigated. The particle packing densities of the deposits at various applied voltages and deposition time were also analyzed by a scanning electron microscope（SEM）. The results show that crack-free α-Fe2O3 coatings with uniform microstructure and good adherence to the nickel substrates are successfully obtained. Electrophoretic deposited α-Fe2O3 coating from aqueous suspension is a feasible, low-cost and environmental friendly method.
作者 马莉 常通 李小斌 李志友 张斗 周科朝
机构地区 School of Metallurgy and Environment State Key Laboratory of Powder Metallurgy (Central South University)
出处 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第6期2027-2035,共9页 中南大学学报（英文版）
基金 Project(51021063)supported by the National Natural Science Foundation for Innovation Group of China Project(2012M521540)supported by China Postdoctoral Science Foundation Project(2013RS4027)supported by the Post Doctoral Scientific Foundation of Hunan Province,China Project(CSUZC2013023)supported by the Precious Apparatus Open Share Foundation of Central South University,China
关键词 电泳沉积 氧化铁 铁涂层 扫描电子显微镜 阴极 ZETA电位 沉积时间 外加电压 electrophoretic deposition Fe2O3 coating aqueous solutions zeta potential
分类号 TQ153 [化学工程—电化学工业]
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Journal of Central South University
2015年 第6期

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