Laminated alumina/zirconia ceramic composites prepared by electrophoretic

0385457 - ÚFM 2013 RIV GB eng J - Journal Article
Hadraba, Hynek - Drdlík, D. - Chlup, Zdeněk - Maca, K. - Dlouhý, Ivo - Cihlář, J.
Laminated alumina/zirconia ceramic composites prepared by electrophoretic.
Journal of the European Ceramic Society. Roč. 32, č. 9 (2012), s. 2053-2056. ISSN 0955-2219. E-ISSN 1873-619X.
[Engineering Ceramics 2011 - from Materials to Components. Smolenice, 09.05.2011-12.05.2011]
R&D Projects: GA ČR(CZ) GAP108/11/1644
Institutional research plan: CEZ:AV0Z20410507
Institutional support: RVO:68081723
Keywords : electrophoretic deposition * composites * hardness * Al2O3 * ZrO2
Subject RIV: JH - Ceramics, Fire-Resistant Materials and Glass
Impact factor: 2.360, year: 2012

The electrophoretic deposition of alumina and zirconia powders from isopropanolic suspension in the presence of monochloracetic acid was studied in the constant-current regime. The different levels of electric current during deposition from 250 µA to 48 mA were used. The green density of the deposit depends on the current density and then on the particle velocity during deposition, reaching values from 58% to 61% according to the electric current used. It was found that the lower the green density of the green deposit, the larger the pores. The low green density led to low final fired density and subsequently to the low Vickers hardness HV5 ranging from 2000 to 1650 depending on electric current used. Based on these findings microlaminates having various thickness ratios to achieve different residual stress levels were prepared consisting of alternating layers of alumina and zirconia.
Permanent Link: http://hdl.handle.net/11104/0214697