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DRDLÍK, D. CHLUP, Z. HADRABA, H. DRDLÍKOVÁ, K.
Original Title
Surface roughness improvement of near net shaped alumina by EPD
Type
journal article in Web of Science
Language
English
Original Abstract
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.
Keywords
Alumina; Electrophoretic deposition; Electrical conductivity; Surface roughness; Thick layer
Authors
DRDLÍK, D.; CHLUP, Z.; HADRABA, H.; DRDLÍKOVÁ, K.
Released
13. 5. 2020
Publisher
Springer Publishing
Location
New York, NY
ISBN
2510-1560
Periodical
Journal of the Australian Ceramic Society
Year of study
56
Number
2
State
United States of America
Pages from
721
Pages to
727
Pages count
7
URL
https://link.springer.com/article/10.1007/s41779-019-00390-y
BibTex
@article{BUT163969, author="Daniel {Drdlík} and Zdeněk {Chlup} and Hynek {Hadraba} and Katarina {Drdlíková}", title="Surface roughness improvement of near net shaped alumina by EPD", journal="Journal of the Australian Ceramic Society", year="2020", volume="56", number="2", pages="721--727", doi="10.1007/s41779-019-00390-y", issn="2510-1560", url="https://link.springer.com/article/10.1007/s41779-019-00390-y" }