Composition and microstructure of nanosized, amorphous and crystalline silicon nitride powders before, during and after densification

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Abstract

The composition, microstructure and densification behaviour of two amorphous and three crystalline silicon nitride powders containing an MgO-Y2O3 sintering aid have been investigated. The powders were characterised in terms of bulk and surface chemical compositions, crystallinity and morphology. The hot-pressing behaviours of the powders were assessed by considering the mass losses on densification, relative densities and the chemical and phase compositions and microstructure of the dense materials. Densification kinetics were analysed by the computer evaluation of hot-pressing data.

Original languageEnglish
Pages (from-to)1175-1186
Number of pages12
JournalJournal of Materials Chemistry
Volume6
Issue number7
Publication statusPublished - 1996

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densification
Silicon nitride
Densification
silicon nitrides
Powders
amorphous silicon
hot pressing
Hot pressing
Crystalline materials
microstructure
Microstructure
chemical composition
silicon
Chemical analysis
Phase composition
crystallinity
sintering
Sintering
Kinetics
evaluation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Materials Science(all)

Cite this

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abstract = "The composition, microstructure and densification behaviour of two amorphous and three crystalline silicon nitride powders containing an MgO-Y2O3 sintering aid have been investigated. The powders were characterised in terms of bulk and surface chemical compositions, crystallinity and morphology. The hot-pressing behaviours of the powders were assessed by considering the mass losses on densification, relative densities and the chemical and phase compositions and microstructure of the dense materials. Densification kinetics were analysed by the computer evaluation of hot-pressing data.",
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AB - The composition, microstructure and densification behaviour of two amorphous and three crystalline silicon nitride powders containing an MgO-Y2O3 sintering aid have been investigated. The powders were characterised in terms of bulk and surface chemical compositions, crystallinity and morphology. The hot-pressing behaviours of the powders were assessed by considering the mass losses on densification, relative densities and the chemical and phase compositions and microstructure of the dense materials. Densification kinetics were analysed by the computer evaluation of hot-pressing data.

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