Effect of sintering conditions and heat treatment on the properties, microstructure and machining performance of α-β-SiAlON ceramics

N. Calis Acikbas; H. Yurdakul; H. Mandal; F. Kara; S. Turan; A. Kara; B. Bitterlich

doi:10.1016/j.jeurceramsoc.2011.11.030

Effect of sintering conditions and heat treatment on the properties, microstructure and machining performance of α-β-SiAlON ceramics

N. Calis Acikbas^*, H. Yurdakul, H. Mandal, F. Kara, S. Turan, A. Kara, B. Bitterlich

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

The properties of SiAlON ceramics are strongly affected by the composition and structure of the intergranular phase, which are controlled by dopants, sintering conditions and starting silicon nitride (Si ₃N ₄) powder characteristics. In this study, 25α:75β SiAlON compositions were designed with different molar ratios of Y:Sm:Ca (9:0.5:0.5 and 3:6:1). The effects of cation ratios, different cooling profiles (50°C/min and 5°C/min) and further heat treatment under different conditions (at 1600°C for 2, 4 and 6h) on the final phase composition, the type of the intergranular phase (amorphous or crystalline) formation, the resulting microstructures and the machining performance were studied. It is found that slow cooling and heat treatment have a great influence on crystallisation behaviour and in turn the crystallisation enhance the machining performance of SiAlON materials in cutting tool applications.

Original language	English
Pages (from-to)	1321-1327
Number of pages	7
Journal	Journal of the European Ceramic Society
Volume	32
Issue number	7
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2011.11.030
Publication status	Published - Jun 2012
Externally published	Yes

Keywords

Cation
Crystallisation
Heat treatment
Properties
SiAlON
TEM characterisation

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10.1016/j.jeurceramsoc.2011.11.030

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title = "Effect of sintering conditions and heat treatment on the properties, microstructure and machining performance of α-β-SiAlON ceramics",

abstract = "The properties of SiAlON ceramics are strongly affected by the composition and structure of the intergranular phase, which are controlled by dopants, sintering conditions and starting silicon nitride (Si 3N 4) powder characteristics. In this study, 25α:75β SiAlON compositions were designed with different molar ratios of Y:Sm:Ca (9:0.5:0.5 and 3:6:1). The effects of cation ratios, different cooling profiles (50°C/min and 5°C/min) and further heat treatment under different conditions (at 1600°C for 2, 4 and 6h) on the final phase composition, the type of the intergranular phase (amorphous or crystalline) formation, the resulting microstructures and the machining performance were studied. It is found that slow cooling and heat treatment have a great influence on crystallisation behaviour and in turn the crystallisation enhance the machining performance of SiAlON materials in cutting tool applications.",

keywords = "Cation, Crystallisation, Heat treatment, Properties, SiAlON, TEM characterisation",

author = "{Calis Acikbas}, N. and H. Yurdakul and H. Mandal and F. Kara and S. Turan and A. Kara and B. Bitterlich",

year = "2012",

month = jun,

doi = "10.1016/j.jeurceramsoc.2011.11.030",

language = "English",

volume = "32",

pages = "1321--1327",

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AU - Calis Acikbas, N.

AU - Yurdakul, H.

AU - Mandal, H.

AU - Kara, F.

AU - Turan, S.

AU - Kara, A.

AU - Bitterlich, B.

PY - 2012/6

Y1 - 2012/6

N2 - The properties of SiAlON ceramics are strongly affected by the composition and structure of the intergranular phase, which are controlled by dopants, sintering conditions and starting silicon nitride (Si 3N 4) powder characteristics. In this study, 25α:75β SiAlON compositions were designed with different molar ratios of Y:Sm:Ca (9:0.5:0.5 and 3:6:1). The effects of cation ratios, different cooling profiles (50°C/min and 5°C/min) and further heat treatment under different conditions (at 1600°C for 2, 4 and 6h) on the final phase composition, the type of the intergranular phase (amorphous or crystalline) formation, the resulting microstructures and the machining performance were studied. It is found that slow cooling and heat treatment have a great influence on crystallisation behaviour and in turn the crystallisation enhance the machining performance of SiAlON materials in cutting tool applications.

AB - The properties of SiAlON ceramics are strongly affected by the composition and structure of the intergranular phase, which are controlled by dopants, sintering conditions and starting silicon nitride (Si 3N 4) powder characteristics. In this study, 25α:75β SiAlON compositions were designed with different molar ratios of Y:Sm:Ca (9:0.5:0.5 and 3:6:1). The effects of cation ratios, different cooling profiles (50°C/min and 5°C/min) and further heat treatment under different conditions (at 1600°C for 2, 4 and 6h) on the final phase composition, the type of the intergranular phase (amorphous or crystalline) formation, the resulting microstructures and the machining performance were studied. It is found that slow cooling and heat treatment have a great influence on crystallisation behaviour and in turn the crystallisation enhance the machining performance of SiAlON materials in cutting tool applications.

KW - Cation

KW - Crystallisation

KW - Heat treatment

KW - Properties

KW - SiAlON

KW - TEM characterisation

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DO - 10.1016/j.jeurceramsoc.2011.11.030

M3 - Article

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SN - 0955-2219

VL - 32

SP - 1321

EP - 1327

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 7

ER -

Effect of sintering conditions and heat treatment on the properties, microstructure and machining performance of α-β-SiAlON ceramics

Abstract

Keywords

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