Study of the devitrification behaviour of a barium magnesium aluminosilicate glass-ceramic

Konstantina Lambrinou, Omer Van der Biest

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This work presents the most important aspects of the devitrification behaviour of a barium magnesium aluminosilicate (BMAS) glass-ceramic with the Ba-osumilite stoichiometry. The melt-derived BMAS glass-ceramic was first pulverised and subsequently hot pressed to produce sintered powder compacts, some of which were subjected to post-sintering heat treatments in air. The BMAS glass devitrification behaviour was studied by means of scanning electron microscopy (SEM), electron probe microanalysis (EPMA), transmission electron microscopy (TEM), and X-ray diffraction (XRD). This study revealed that at temperatures <1000 °C, the BMAS glass crystallisation yielded several metastable crystalline phases (i.e. celsian, hexacelsian, α/β-cordierite, and β-quartzss) instead of the thermodynamically stable Ba-osumilite. On the other hand, annealing of the BMAS glass at temperatures ≥1000 °C caused the transformation of all metastable phases to Ba-osumilite. Understanding the crystallisation behaviour of the BMAS glass-ceramic is essential in order to use this material as matrix in fibre-reinforced composites suitable for high-temperature structural applications.

Original languageEnglish
Pages (from-to)1805-1809
Number of pages5
JournalJournal of the European Ceramic Society
Volume27
Issue number2-3
Early online date15 Jun 2006
DOIs
Publication statusPublished - 2007
Externally publishedYes

Fingerprint

Aluminosilicates
Glass ceramics
Barium
Magnesium
Crystallization
Glass
Metastable phases
Electron probe microanalysis
Stoichiometry
Powders
Temperature
aluminum magnesium silicate
Sintering
Heat treatment
Annealing
Crystalline materials
Transmission electron microscopy
X ray diffraction
Scanning electron microscopy
Fibers

Cite this

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abstract = "This work presents the most important aspects of the devitrification behaviour of a barium magnesium aluminosilicate (BMAS) glass-ceramic with the Ba-osumilite stoichiometry. The melt-derived BMAS glass-ceramic was first pulverised and subsequently hot pressed to produce sintered powder compacts, some of which were subjected to post-sintering heat treatments in air. The BMAS glass devitrification behaviour was studied by means of scanning electron microscopy (SEM), electron probe microanalysis (EPMA), transmission electron microscopy (TEM), and X-ray diffraction (XRD). This study revealed that at temperatures <1000 °C, the BMAS glass crystallisation yielded several metastable crystalline phases (i.e. celsian, hexacelsian, α/β-cordierite, and β-quartzss) instead of the thermodynamically stable Ba-osumilite. On the other hand, annealing of the BMAS glass at temperatures ≥1000 °C caused the transformation of all metastable phases to Ba-osumilite. Understanding the crystallisation behaviour of the BMAS glass-ceramic is essential in order to use this material as matrix in fibre-reinforced composites suitable for high-temperature structural applications.",
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Study of the devitrification behaviour of a barium magnesium aluminosilicate glass-ceramic. / Lambrinou, Konstantina; Van der Biest, Omer.

In: Journal of the European Ceramic Society, Vol. 27, No. 2-3, 2007, p. 1805-1809.

Research output: Contribution to journalArticle

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