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Surface roughness improvement of near net shaped alumina by EPD
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SYSNO ASEP 0532868 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Surface roughness improvement of near net shaped alumina by EPD Author(s) Drdlík, D. (CZ)
Chlup, Zdeněk (UFM-A) RID, ORCID
Hadraba, Hynek (UFM-A) RID, ORCID
Drdlíková, K. (CZ)Number of authors 4 Source Title Journal of the Australian Ceramic Society. - : Springer - ISSN 2510-1560
Roč. 56, č. 2 (2020), s. 721-727Number of pages 7 s. Language eng - English Country US - United States Keywords Alumina ; Electrophoretic deposition ; Electrical conductivity ; Surface roughness ; Thick layer Subject RIV JH - Ceramics, Fire-Resistant Materials and Glass OECD category Ceramics R&D Projects LQ1601 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA17-08153S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFM-A - RVO:68081723 UT WOS 000532990000036 EID SCOPUS 85068834384 DOI 10.1007/s41779-019-00390-y Annotation The high surface roughness of thick and dense alumina deposits prepared by long-term electrophoretic deposition (EPD) caused by surface inhomogeneities could be eliminated by changing the suspension composition or EPD parameters. This work is aimed at the influence of the suspension composition, more precisely on the increase of electrical conductivity through indifferent electrolyte (lithium chloride) addition and its effect on the surface roughness. At first, the electrical conductivity was adjusted by the various amounts of the stabilisers of mono-, di- and trichloroacetic acid in the range of 0.85–21.25 wt%. It was demonstrated that deposits prepared from these suspensions were several millimetres thick, dense with a relatively low surface roughness (Ra ≈ 10 μm) only when the electrical conductivity was higher than 4 μS/cm. If a portion of the stabiliser was replaced with indifferent electrolyte, it resulted in the significantly smoother surface with a roughness Ra ≈ 2 μm preserving all other benefits. Suggested optimization represents a useful novel approach for the preparation of dense, thick and near net-shaped alumina deposits with low surface roughness via EPD. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2021 Electronic address https://link.springer.com/article/10.1007/s41779-019-00390-y
Number of the records: 1