Publication result detail

Surface roughness improvement of near net shaped alumina by EPD

DRDLÍK, D.; CHLUP, Z.; HADRABA, H.; DRDLÍKOVÁ, K.

Original Title

Surface roughness improvement of near net shaped alumina by EPD

English Title

Surface roughness improvement of near net shaped alumina by EPD

Type

WoS Article

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.

English 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

Key words in English

Alumina; Electrophoretic deposition; Electrical conductivity; Surface roughness; Thick layer

Authors

DRDLÍK, D.; CHLUP, Z.; HADRABA, H.; DRDLÍKOVÁ, K.

RIV year

2021

Released

13.05.2020

Publisher

Springer Publishing

Location

New York, NY

ISBN

2510-1560

Periodical

Journal of the Australian Ceramic Society

Volume

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"
}