Detail publikačního výsledku

Improved microstructure of alumina ceramics prepared from DBD plasma activated powders

POUCHLÝ, V.; RÁHEĽ, J.; SPUSTA, T.; ILČÍKOVÁ, M.; PAVLIŇÁK, D.; MORÁVEK, T.; MACA, K.

Originální název

Improved microstructure of alumina ceramics prepared from DBD plasma activated powders

Anglický název

Improved microstructure of alumina ceramics prepared from DBD plasma activated powders

Druh

Článek WoS

Originální abstrakt

Submicron Al2O3 powders were activated by Diffuse Coplanar Surface Barrier Discharge (DCSBD) plasma. The influence of the plasma treatment on the powder properties and their impact on the microstructure of dry and wet shaped ceramics were investigated. Raman and FTIR analyses of treated powders showed a substantial increase of the powder’s surface hydroxylation, surface cleaning, and the presence of adsorbed NOx originating from the DCSBD. Sintering of the dry shaped plasma treated powders did not influence sintering behavior. On the other hand, the plasma treated powder was able to form stable water suspension without any chemical stabilization aid. Slip cast samples exhibited finer pore size distribution, a higher sinterability, and a finer final microstructure. The grain size of slip casted plasma treated powder was reduced by a factor of 1.7, which facilitated a grain size of 0.68 μm at the relative density of 99.54% t.d. obtained by pressure-less sintering.

Anglický abstrakt

Submicron Al2O3 powders were activated by Diffuse Coplanar Surface Barrier Discharge (DCSBD) plasma. The influence of the plasma treatment on the powder properties and their impact on the microstructure of dry and wet shaped ceramics were investigated. Raman and FTIR analyses of treated powders showed a substantial increase of the powder’s surface hydroxylation, surface cleaning, and the presence of adsorbed NOx originating from the DCSBD. Sintering of the dry shaped plasma treated powders did not influence sintering behavior. On the other hand, the plasma treated powder was able to form stable water suspension without any chemical stabilization aid. Slip cast samples exhibited finer pore size distribution, a higher sinterability, and a finer final microstructure. The grain size of slip casted plasma treated powder was reduced by a factor of 1.7, which facilitated a grain size of 0.68 μm at the relative density of 99.54% t.d. obtained by pressure-less sintering.

Klíčová slova

Alumina Slip casting Sintering Grain size DBD plasma treatment

Klíčová slova v angličtině

Alumina Slip casting Sintering Grain size DBD plasma treatment

Autoři

POUCHLÝ, V.; RÁHEĽ, J.; SPUSTA, T.; ILČÍKOVÁ, M.; PAVLIŇÁK, D.; MORÁVEK, T.; MACA, K.

Rok RIV

2019

Vydáno

01.04.2019

ISSN

1873-619X

Periodikum

Journal of the European Ceramic Society

Svazek

39

Číslo

4

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1297

Strany do

1303

Strany počet

7

URL

https://www.sciencedirect.com/science/article/pii/S0955221918306873

BibTex

@article{BUT151502,
  author="Václav {Pouchlý} and Jozef {Ráheľ} and Tomáš {Spusta} and Martina {Ilčíková} and David {Pavliňák} and Tomáš {Morávek} and Karel {Maca}",
  title="Improved microstructure of alumina ceramics prepared from DBD plasma activated powders",
  journal="Journal of the European Ceramic Society",
  year="2019",
  volume="39",
  number="4",
  pages="1297--1303",
  doi="10.1016/j.jeurceramsoc.2018.11.022",
  issn="0955-2219",
  url="https://www.sciencedirect.com/science/article/pii/S0955221918306873"
}