caa a22 4500 463221672 CHVBK 20180405153214.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10853-006-1279-x doi (NATIONALLICENCE)springer-10.1007/s10853-006-1279-x Surface reactivity and electrophoretic deposition of ZrO2-MgO mechanical mixture [Elektronische Daten] [Ricardo Castro, Paulo Marcos, Eduardo Sakamoto, Douglas Gouvêa] Electrophoretic deposition (EPD) is a precision technique useful for obtaining high quality ceramic bodies with controlled dimensions and smooth coatings. The electrophoretic deposition rate is highly dependent on the surface chemistry of the powders, especially when dealing with multi-component systems. The objective of this work is to study the surface reactivity of both ZrO2 and MgO in ethanol suspension to provide experimental benchmarks to control EPD of a ZrO2-3wt% MgO mechanical mixture (Z3M) in ethanol. Infrared spectroscopy (FTIR) showed that ZrO2 surface spontaneously reacts with ethanol, generating negative electrophoretic mobility of the particles (−0.07×10−8V−1s−1) measured by Electroacoustic Sonic Amplitude (ESA). MgO surface also spontaneously reacted with ethanol, but a positive electrophoretic mobility was observed in this case (0.26×10−8V−1s−1). Scanning Electron Microscopy of Z3M dried from ethanol suspension showed that MgO particles were located around the ZrO2 particles, forming composite agglomerates, probably due to the electrostatic attraction between MgO and ZrO2 particles. Homogeneous deposits could be obtained from EPD of Z3M ethanol suspensions. Mercury intrusion porosimetry showed that the ZrO2-MgO green deposited bodies using different voltages had similar pores diameters distributions, indicating that the ZrO2-MgO agglomerates are not affected by the increasing deposition rates. Springer Science+Business Media, LLC, 2007 Castro Ricardo Department of Materials Engineering, Centro Universitário da FEI, Av. Humberto A.C. Branco, 3972, 09850-901, São Bernardo do Campo, SP, Brazil aut Marcos Paulo Department of Metallurgical and Materials Engineering, Escola Politécnica, University of São Paulo, Av. Prof. Mello Moraes, 2463, 05508-900, São Paulo, SP, Brazil aut Sakamoto Eduardo Department of Metallurgical and Materials Engineering, Escola Politécnica, University of São Paulo, Av. Prof. Mello Moraes, 2463, 05508-900, São Paulo, SP, Brazil aut Gouvêa Douglas Department of Metallurgical and Materials Engineering, Escola Politécnica, University of São Paulo, Av. Prof. Mello Moraes, 2463, 05508-900, São Paulo, SP, Brazil aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/16(2007-08-01), 6946-6950 0022-2461 42:16<6946 2007 42 10853 https://doi.org/10.1007/s10853-006-1279-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1279-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Castro Ricardo Department of Materials Engineering, Centro Universitário da FEI, Av. Humberto A.C. Branco, 3972, 09850-901, São Bernardo do Campo, SP, Brazil aut NATIONALLICENCE 700 1- Marcos Paulo Department of Metallurgical and Materials Engineering, Escola Politécnica, University of São Paulo, Av. Prof. Mello Moraes, 2463, 05508-900, São Paulo, SP, Brazil aut NATIONALLICENCE 700 1- Sakamoto Eduardo Department of Metallurgical and Materials Engineering, Escola Politécnica, University of São Paulo, Av. Prof. Mello Moraes, 2463, 05508-900, São Paulo, SP, Brazil aut NATIONALLICENCE 700 1- Gouvêa Douglas Department of Metallurgical and Materials Engineering, Escola Politécnica, University of São Paulo, Av. Prof. Mello Moraes, 2463, 05508-900, São Paulo, SP, Brazil aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/16(2007-08-01), 6946-6950 0022-2461 42:16<6946 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer