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Effect of rheology and processing parameters on the EPD coatings of basic sol-gel particulate sol

AuthorsCastro Martín, Yolanda ; Ferrari-Fernández, Begoña ; Durán, Alicia ; Moreno Botella, Rodrigo María
Issue Date2004
PublisherKluwer Academic Publishers
CitationJOURNAL OF MATERIALS SCIENCE 39 (2004) 845– 849
AbstractHomogeneous thick silica coatings were prepared onto metals substrates by Electrophoretic Deposition (EPD) using particulate sol-gel sols. The synthesis of the sols was performed by mixing tetraethoxysilane and methyltriethoxysilane under basic catalysis. The synthesis, storage and processing conditions were optimised, correlating the rheological properties of the sols with EPD performance and reliability. Homogeneous and crack-free coatings are obtained when both, the synthesis and the deposition, are performed under tight conditions avoiding the contact with room humidity. The maximum crack-free thickness of the sintered coatings was 12 μm, three times more than those obtained by dipping
Publisher version (URL)http://www.springerlink.com/content/h40h71h845w01242/fulltext.pdf
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