Thermal shock resistance of pressureless sintered SiC/AlN ceramic composites

Thermal shock resistance of pressureless sintered SiC/AlN ceramic composites

This paper conducts for the first time, a study of thermal shock resistance properties of different pressureless sintered SiC/AlN ceramic composites. SiC/AlN composites with different AlN content (0-40 wt%) were obtained by pressureless sintering of SiC and AlN powders at temperature of 2080 °C/2 h...

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Veröffentlicht in:Materials research express 2018-01, Vol.5 (1), p.15506
Hauptverfasser: Besisa, Dina H A, Ewais, Emad M M, Ahmed, Yasser M Z, Elhosiny, Fouad I, Fend, Thomas, Kuznetsov, Denis V
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Cold crushing strength
densification parameters
microstructure
SiC/AlN composites
thermal shock resistance
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container_start_page 15506
container_title Materials research express
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creator Besisa, Dina H A
Ewais, Emad M M
Ahmed, Yasser M Z
Elhosiny, Fouad I
Fend, Thomas
Kuznetsov, Denis V
description This paper conducts for the first time, a study of thermal shock resistance properties of different pressureless sintered SiC/AlN ceramic composites. SiC/AlN composites with different AlN content (0-40 wt%) were obtained by pressureless sintering of SiC and AlN powders at temperature of 2080 °C/2 h in Ar/vacuum atmosphere with using 2.5% yttria and alumina as sintering aids. The different ceramic composites are subjected to 20 thermal shock/water quenching cycles at temperature of 700 °C. Mechanical strength and microstructure investigation before and after thermal shock exposure were used to evaluate thermal shock properties and durability of the different composites. It was found that, the investigated carbide/nitride ceramics gave high thermal shock resistance without any cracking or spalling with retention of about 70% of its original strength. Results suggest that, SiC/AlN composites are strong candidate in severe thermal shock resistance environments.
doi_str_mv 10.1088/2053-1591/aaa2c2
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SiC/AlN composites with different AlN content (0-40 wt%) were obtained by pressureless sintering of SiC and AlN powders at temperature of 2080 °C/2 h in Ar/vacuum atmosphere with using 2.5% yttria and alumina as sintering aids. The different ceramic composites are subjected to 20 thermal shock/water quenching cycles at temperature of 700 °C. Mechanical strength and microstructure investigation before and after thermal shock exposure were used to evaluate thermal shock properties and durability of the different composites. It was found that, the investigated carbide/nitride ceramics gave high thermal shock resistance without any cracking or spalling with retention of about 70% of its original strength. 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subjects Cold crushing strength
densification parameters
microstructure
SiC/AlN composites
thermal shock resistance
title Thermal shock resistance of pressureless sintered SiC/AlN ceramic composites
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