Thermomechanical Properties related to Microstructural Design of Alumina/Aluminum Titanate Composite Materials
MOUIYA M. 1,2, TESSIER-DOYEN N. 2, TAMRAOUI Y. 1, DUPRÉ J. 3, DOUMALIN P. 3, ALAMI J. 1, HUGER M. 2
1 Materials Science, Energy and Nanoengineering Department, University Mohammed VI Polytechnic (UM6P), Benguerir, Morocco; 2 University of Limoges, Institute of Research for Ceramics (IRCER), Limoges, France; 3 University of Poitiers, PPRIME UPR CNRS 3346, Poitiers, France
This work focuses on the development and characterization of composite ceramic materials with a high thermal shock resistance. In this way, highly anisotropic aluminum titanate inclusions were dispersed within an alumina matrix in various proportions (0-10 wt%). The main objective is to promote intentionally damage during the cooling stage of sintering due to thermal expansion mismatch between the constituents. The resulting Al2O3/Al2TiO5 composites were characterized accurately using various high-temperature experimental techniques, including ultrasonic pulse echography in long bar mode, acoustic emission, dilatometry, and tensile testing up to 1500 °C. Fracture behaviour was evaluated at room temperature using the Wedge Splitting Test (WST) coupled with 2P-Digital Image Correlation (DIC), and in-house developed equipment called ATHORNA was used to highlight more effective thermal shock characterization.