Authors:
V. Gauthier-Brunet (1); A. Zuber (1); J. Roger (2); J. Gonzalez-Julian (3); S. Dubois (1)
1- Institut PPRIME, CNRS/Université de Poitiers/ENSMA, UPR 3346, TSA 41126, 86073 Poitiers, France
2- Laboratoire des Composites ThermoStructuraux, Université de Bordeaux/CNRS/SAFRAN Ceramics, UMR 5801, 33600 Pessac, France
3- Institute of Mineral Engineering, RWTH Aachen University, 52074 Aachen, Germany
Abstract:
MAX phases are a family of nanolayered carbides and nitrides widely studied for their unique properties cumulating those of ceramics and metals. Cr2AlC is considered as one of the most promising MAX phase for its corrosion resistance properties. In this study, fine and coarse-grained Cr2AlC samples were respectively synthesized using spark plasma sintering and hot isostatic pressing techniques. The operating parameters were varied to optimize the purity and the density of the end-product.
Oxidation tests were carried out in dry air on fine and coarse-grained polycrystalline samples in the temperature range 800-1400 ◦C up to 1000h. Thermodynamic calculations were also performed to give further analysis of the experiments and to better understand the oxidation mechanisms. The effect of both the oxidation conditions and the MAX phases microstructural characteristics (grain size) were studied via the observation of the oxide layers morphology, the analysis of the oxidation products and the study of the oxidation kinetics.
DOI:
https://doi.org/10.59499/EP235763879
