SiAlON B-phase glass-ceramic microstructures

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

doi:10.4028/3-908454-00-X.103

SiAlON B-phase glass-ceramic microstructures

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

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Abstract

This paper is focussed on the development of micro structure 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 R ³⁺ 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.

Original language	English
Pages (from-to)	103-106
Number of pages	4
Journal	Key Engineering Materials
Volume	403
DOIs	https://doi.org/10.4028/3-908454-00-X.103
Publication status	Published - 2009

Keywords

B-phase
Cation composition
EDX
Glass-ceramics
Sialon
TEM

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10.4028/3-908454-00-X.103

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title = "SiAlON B-phase glass-ceramic microstructures",

abstract = "This paper is focussed on the development of micro structure 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 R 3+ 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.",

keywords = "B-phase, Cation composition, EDX, Glass-ceramics, Sialon, TEM",

author = "Falk, \{Lena K.L.\} and Yvonne Menke and Stuart Hampshire",

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doi = "10.4028/3-908454-00-X.103",

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volume = "403",

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T1 - SiAlON B-phase glass-ceramic microstructures

AU - Falk, Lena K.L.

AU - Menke, Yvonne

AU - Hampshire, Stuart

PY - 2009

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N2 - This paper is focussed on the development of micro structure 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 R 3+ 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.

AB - This paper is focussed on the development of micro structure 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 R 3+ 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.

KW - B-phase

KW - Cation composition

KW - EDX

KW - Glass-ceramics

KW - Sialon

KW - TEM

UR - https://www.scopus.com/pages/publications/58849129162

U2 - 10.4028/3-908454-00-X.103

DO - 10.4028/3-908454-00-X.103

M3 - Article

AN - SCOPUS:58849129162

SN - 1013-9826

VL - 403

SP - 103

EP - 106

JO - Key Engineering Materials

JF - Key Engineering Materials

ER -

SiAlON B-phase glass-ceramic microstructures

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Keywords

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