Detail publikace

Transparent magnesium aluminate spinel: Effect of critical temperature in two-stage spark plasma sintering

TALIMIAN, A. POUCHLÝ, V. EL-MAGHRABY, H. MACA, K. GALUSEK, D.

Originální název

Transparent magnesium aluminate spinel: Effect of critical temperature in two-stage spark plasma sintering

Anglický název

Transparent magnesium aluminate spinel: Effect of critical temperature in two-stage spark plasma sintering

Jazyk

en

Originální abstrakt

The discolouration of magnesium aluminate spinet caused by carbon contamination is a main drawback of fabricating transparent bodies by spark plasma sintering (SPS). In this study, a two-stage heating rate profile was used to produce transparent MgAl2O4 without using sintering aids by SPS at 1250 degrees C. The effect of critical temperature (Tc), at which the heating rate is decreased, on transparency and carbon contamination was investigated: higher critical temperature resulted in higher contamination. Non-uniform densification indicated that fast heating results in a hot-zone formation in the centre of sintered pellets; the higher temperature of centre favoured reaction of graphite die with spinel and formation of disordered carbon structures in residual pores.

Anglický abstrakt

The discolouration of magnesium aluminate spinet caused by carbon contamination is a main drawback of fabricating transparent bodies by spark plasma sintering (SPS). In this study, a two-stage heating rate profile was used to produce transparent MgAl2O4 without using sintering aids by SPS at 1250 degrees C. The effect of critical temperature (Tc), at which the heating rate is decreased, on transparency and carbon contamination was investigated: higher critical temperature resulted in higher contamination. Non-uniform densification indicated that fast heating results in a hot-zone formation in the centre of sintered pellets; the higher temperature of centre favoured reaction of graphite die with spinel and formation of disordered carbon structures in residual pores.

Plný text v Digitální knihovně

Dokumenty

BibTex


@article{BUT163795,
  author="Ali {Talimian} and Václav {Pouchlý} and H.F. {El-Maghraby} and Karel {Maca} and Dušan {Galusek}",
  title="Transparent magnesium aluminate spinel: Effect of critical temperature in two-stage spark plasma sintering",
  annote="The discolouration of magnesium aluminate spinet caused by carbon contamination is a main drawback of fabricating transparent bodies by spark plasma sintering (SPS). In this study, a two-stage heating rate profile was used to produce transparent MgAl2O4 without using sintering aids by SPS at 1250 degrees C. The effect of critical temperature (Tc), at which the heating rate is decreased, on transparency and carbon contamination was investigated: higher critical temperature resulted in higher contamination. Non-uniform densification indicated that fast heating results in a hot-zone formation in the centre of sintered pellets; the higher temperature of centre favoured reaction of graphite die with spinel and formation of disordered carbon structures in residual pores.",
  address="ELSEVIER SCI LTD",
  chapter="163795",
  doi="10.1016/j.jeurceramsoc.2020.02.012",
  howpublished="online",
  institution="ELSEVIER SCI LTD",
  number="6",
  volume="40",
  year="2020",
  month="june",
  pages="2417--2425",
  publisher="ELSEVIER SCI LTD",
  type="journal article in Web of Science"
}