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The thermal shock and fatigue behavior of pressureless sintered Al2O3–SiO2–ZrO2 (ASZ) composites was studied. The influence of the thermal shock and fatigue on the strengthening response of ASZ has been investigated by measuring the strength retention and microstructural changes. The magnitude of the flexural strength and fracture of the ASZ has been compared with that of the monolithic Al2O3 (A) and Al2O3–ZrO2 (AZ) composites under the same experimental conditions. Results indicated that the ASZ composites possess the highest resistance against thermal shock and fatigue, in comparison with A and AZ. The improvements were attributed to the enhancement in the fracture toughness of ASZ and the presence of multi-phase reinforcement.


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Thermal shock and fatigue behavior of pressureless sintered Al2O3–SiO2–ZrO2 composites

Show Author's information G. MEBRAHITOM ASMELASHa( )O. MAMATbF. AHMADbA. K. PRASADA RAOa
Faculty of Manufacturing Engineering, Universiti Malaysia Pahang, Pekan, Pahang, Malaysia
Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia

Abstract

The thermal shock and fatigue behavior of pressureless sintered Al2O3–SiO2–ZrO2 (ASZ) composites was studied. The influence of the thermal shock and fatigue on the strengthening response of ASZ has been investigated by measuring the strength retention and microstructural changes. The magnitude of the flexural strength and fracture of the ASZ has been compared with that of the monolithic Al2O3 (A) and Al2O3–ZrO2 (AZ) composites under the same experimental conditions. Results indicated that the ASZ composites possess the highest resistance against thermal shock and fatigue, in comparison with A and AZ. The improvements were attributed to the enhancement in the fracture toughness of ASZ and the presence of multi-phase reinforcement.

Keywords:

ceramics, flexural strength, fracture toughness, pressureless sintering, thermal fatigue, thermal shock
Received: 11 November 2014 Revised: 06 February 2015 Accepted: 26 February 2015 Published: 04 July 2015 Issue date: September 2015
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Publication history

Received: 11 November 2014
Revised: 06 February 2015
Accepted: 26 February 2015
Published: 04 July 2015
Issue date: September 2015

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© The author(s) 2015

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