from the conferences organized by TANGER Ltd.
High-entropy alloys (HEAs) have gained significant attention among researchers due to their exceptional mechanical properties (including high hardness, strength and wear resistance), corrosion and oxidation resistance. The combination of these properties, along with good thermal stability, enables a considerable range of potential applications for HEAs. During the production and processing of HEAs, direct contact with refractory ceramic substrates is frequently encountered. However, research on the interactions between these substrates and HEAs remains limited. The present study aims to characterize the interactions between Ni-Fe-Co-Cr high-entropy alloy and industrial ceramic substrates with Al2O3 (68.1–84.7 wt%) and SiO2 (12.9–25.8 wt%) as main components. The interaction was quantitatively described using contact angle measurements and evaluated through the axisymmetric drop shape analysis (ADSA) method, specifically utilizing the sessile drop technique. The experiments were conducted within the CLASIC high-temperature observation furnace. This approach enables the determination of wetting characteristics at elevated temperatures up to 1,600 °C. To prevent oxidation, the experiments were carried out in varying experimental conditions. The measurements were conducted either in a vacuum or under a slight overpressure of high-purity argon (> 99.9999 %). To gain further insights into the interfacial interactions, comprehensive post-experimental analyses of the HEA and ceramic substrates were performed. This included Scanning Electron Microscopy (SEM) for morphological evaluation and Energy-Dispersive Spectroscopy (EDX) microanalysis of chemical composition.
Keywords: High-entropy alloy, interfacial interactions, wettability, sessile drop method© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.