Detail publikace

Pressure assisted sintering of Al2O3-Y2O3 glass microspheres: sintering conditions, grain size, and mechanical properties of sintered ceramics

PRNOVÁ, A. VALÚCHOVÁ, J. MICHÁLKOVÁ, M. PECUŠOVÁ, B. PARCHOVIANSKÝ, M. ŠVANCÁREK, P. HANZEL, O. POUCHLÝ, V. GALUSEK, D.

Originální název

Pressure assisted sintering of Al2O3-Y2O3 glass microspheres: sintering conditions, grain size, and mechanical properties of sintered ceramics

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Glass microspheres with yttria-alumina eutectic composition (76.8 mol % Al2O3 and 23.2 mol % Y2O3) were prepared by sol-gel Pechini method and flame synthesis with or without subsequent milling. Prepared amorphous powders were studied by X-ray powder diffraction (XRD), particle size analysis (PSA), scanning electron microscopy (SEM) and differential thermal analysis (DTA). Hot pressing (HP), rapid hot pressing (RHP) and spark plasma sintering (SPS) were used to sinter amorphous precursor powders at 1600 degrees C without holding time (0 min). The preparation process including milling step resulted in amorphous powders with narrower particle size distribution and smaller particle size. All applied pressure assisted sintering techniques resulted in dense bulk samples with fine grained microstructure consisting of irregular alpha-Al2O3 and Y3Al5O12 (YAG) grains. Milling was beneficial in terms of final microstructure refinement and mechanical properties of sintered materials. A material with the Vickers hardness of HV = (17.1 +/- 0.3) GPa and indentation fracture resistance of (4.2 +/- 0.2) MPa.m(1/2) was prepared from the powder milled for 12 h.

Klíčová slova

Flame synthesis; HP; RHP; solid state chemistry; SPS; SSC 2021; yttrium-aluminate glasses

Autoři

PRNOVÁ, A.; VALÚCHOVÁ, J.; MICHÁLKOVÁ, M.; PECUŠOVÁ, B.; PARCHOVIANSKÝ, M.; ŠVANCÁREK, P.; HANZEL, O.; POUCHLÝ, V.; GALUSEK, D.

Vydáno

23. 2. 2022

Nakladatel

WALTER DE GRUYTER GMBH

Místo

BERLIN

ISSN

1365-3075

Periodikum

PURE AND APPLIED CHEMISTRY

Ročník

94

Číslo

2

Stát

Spojené království Velké Británie a Severního Irska

Strany od

157

Strany do

167

Strany počet

11

URL

https://www.degruyter.com/document/doi/10.1515/pac-2021-0705/html

BibTex

@article{BUT177143,
  author="Anna {Prnová} and Jana {Valúchová} and Monika {Michálková} and Beáta {Pecušová} and Milan {Parchovianský} and Peter {Švancárek} and Ondrej {Hanzel} and Václav {Pouchlý} and Dušan {Galusek}",
  title="Pressure assisted sintering of Al2O3-Y2O3 glass microspheres: sintering conditions, grain size, and mechanical properties of sintered ceramics",
  journal="PURE AND APPLIED CHEMISTRY",
  year="2022",
  volume="94",
  number="2",
  pages="157--167",
  doi="10.1515/pac-2021-0705",
  issn="1365-3075",
  url="https://www.degruyter.com/document/doi/10.1515/pac-2021-0705/html"
}