SiAlON B-Phase Glass-Ceramic Microstructures

L.K.L. Falk; Yvonne Menke; Stuart Hampshire

doi:10.4028/www.scientific.net/KEM.403.103

Paper Titles

Controlled Crystallisation of a Y-Si-Al-O-N Glass Typical of Grain Boundary Glasses Formed in Silicon Nitride-Based Ceramics
p.91

Synthesis and Refinement of β-SiAlON by Nitriding and Post-Sintering of Si Mixture
p.95

Interactions between AlN and SiAlON Ceramics
p.97

Surface Structuring of α/β-Sialon Ceramics by Plasma-Etching
p.99

SiAlON B-Phase Glass-Ceramic Microstructures
p.103

Development of α-β SiAlON Ceramics from Different Si₃N₄ Starting Powders
p.107

Effects of Process on Optical Transmittance of Dy-α-Sialon Sintered at Lower Temperatures
p.109

Mechanical Properties of α- and β-SiAlON Composite Ceramics Using β-SiAlON Powder
p.111

Tribological Performance of Translucent Dy-α-Sialon Ceramics
p.115

HomeKey Engineering MaterialsKey Engineering Materials Vol. 403SiAlON B-Phase Glass-Ceramic Microstructures

SiAlON B-Phase Glass-Ceramic Microstructures

Abstract:

This paper is focussed on the development of microstructure during crystallisation heat treatment of B-phase parent glasses with composition (e/o) 35R:45Si:20Al:83O:17N, where R = Er, Yb, Y or a mixture of Y and Yb. Extensive high resolution analytical transmission electron microscopy has shown that the lenticular B-phase crystals take up a substantial range of composition. The element R is always clearly anti-correlated with the Si, and a larger R3+ cation radius moves the composition range to lower R contents. It is suggested that a locally increased density in the bi-dimensional network of randomly oriented (Si,Al)(O,N)4 tetrahedra is associated with an increased density of vacancies in the R3+ cation lattice.

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Periodical:

Key Engineering Materials (Volume 403)

Pages:

103-106

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.403.103

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Online since:

December 2008

Authors:

L.K.L. Falk, Yvonne Menke, Stuart Hampshire

Keywords:

B-Phase, Cation Composition, EDX, Glas Ceramics, ß-SiAlON, TEM

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References

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