Preparation of AlON ceramics via reactive spark plasma sintering

Filiz Cinar Sahin; Halide Esra Kanbur; Burcu Apak

doi:10.1016/j.jeurceramsoc.2011.10.043

Preparation of AlON ceramics via reactive spark plasma sintering

Filiz Cinar Sahin^*, Halide Esra Kanbur, Burcu Apak

^*Corresponding author for this work

Department of Metallurgical and Materials Engineering

Istanbul Technical University

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

56 Citations (Scopus)

Abstract

Al ₂O ₃ and AlN powder mixtures were used to synthesise AlON ceramics using the reactive spark plasma sintering (SPS) method at temperatures between 1400 and 1650°C for 15-45min at 40MPa under N ₂ gas flow. AlON phase formation was initiated in the samples sintered above 1430°C, according to the X-ray analysis. The complete transformation of the initial phases (Al ₂O ₃ and AlN) into AlON was observed in the samples that were spark plasma sintered at 1650°C for 30min at 40MPa. A high spark plasma sintering temperature together with a low heating rate produced a greater amount of AlON formation at a constant process time. The densification, microstructure and mechanical properties of the produced ceramics were analysed. The highest hardness value was recorded to be 16.7GPa, and the fracture toughness of the sample with the highest AlON ratio was measured to be 3.95MPam ^1/2.

Original language	English
Pages (from-to)	925-929
Number of pages	5
Journal	Journal of the European Ceramic Society
Volume	32
Issue number	4
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2011.10.043
Publication status	Published - Apr 2012

Keywords

Aluminium oxynitride
Microstructure-final
Powder solid state reaction
Spark plasma sintering
X-ray methods

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10.1016/j.jeurceramsoc.2011.10.043

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title = "Preparation of AlON ceramics via reactive spark plasma sintering",

abstract = "Al 2O 3 and AlN powder mixtures were used to synthesise AlON ceramics using the reactive spark plasma sintering (SPS) method at temperatures between 1400 and 1650°C for 15-45min at 40MPa under N 2 gas flow. AlON phase formation was initiated in the samples sintered above 1430°C, according to the X-ray analysis. The complete transformation of the initial phases (Al 2O 3 and AlN) into AlON was observed in the samples that were spark plasma sintered at 1650°C for 30min at 40MPa. A high spark plasma sintering temperature together with a low heating rate produced a greater amount of AlON formation at a constant process time. The densification, microstructure and mechanical properties of the produced ceramics were analysed. The highest hardness value was recorded to be 16.7GPa, and the fracture toughness of the sample with the highest AlON ratio was measured to be 3.95MPam 1/2.",

keywords = "Aluminium oxynitride, Microstructure-final, Powder solid state reaction, Spark plasma sintering, X-ray methods",

author = "Sahin, {Filiz Cinar} and Kanbur, {Halide Esra} and Burcu Apak",

year = "2012",

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doi = "10.1016/j.jeurceramsoc.2011.10.043",

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AU - Sahin, Filiz Cinar

AU - Kanbur, Halide Esra

AU - Apak, Burcu

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N2 - Al 2O 3 and AlN powder mixtures were used to synthesise AlON ceramics using the reactive spark plasma sintering (SPS) method at temperatures between 1400 and 1650°C for 15-45min at 40MPa under N 2 gas flow. AlON phase formation was initiated in the samples sintered above 1430°C, according to the X-ray analysis. The complete transformation of the initial phases (Al 2O 3 and AlN) into AlON was observed in the samples that were spark plasma sintered at 1650°C for 30min at 40MPa. A high spark plasma sintering temperature together with a low heating rate produced a greater amount of AlON formation at a constant process time. The densification, microstructure and mechanical properties of the produced ceramics were analysed. The highest hardness value was recorded to be 16.7GPa, and the fracture toughness of the sample with the highest AlON ratio was measured to be 3.95MPam 1/2.

AB - Al 2O 3 and AlN powder mixtures were used to synthesise AlON ceramics using the reactive spark plasma sintering (SPS) method at temperatures between 1400 and 1650°C for 15-45min at 40MPa under N 2 gas flow. AlON phase formation was initiated in the samples sintered above 1430°C, according to the X-ray analysis. The complete transformation of the initial phases (Al 2O 3 and AlN) into AlON was observed in the samples that were spark plasma sintered at 1650°C for 30min at 40MPa. A high spark plasma sintering temperature together with a low heating rate produced a greater amount of AlON formation at a constant process time. The densification, microstructure and mechanical properties of the produced ceramics were analysed. The highest hardness value was recorded to be 16.7GPa, and the fracture toughness of the sample with the highest AlON ratio was measured to be 3.95MPam 1/2.

KW - Aluminium oxynitride

KW - Microstructure-final

KW - Powder solid state reaction

KW - Spark plasma sintering

KW - X-ray methods

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JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 4

ER -

Preparation of AlON ceramics via reactive spark plasma sintering

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Keywords

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