TY - JOUR T2 - Journal of Mining and Metallurgy, Section B: Metallurgy TI - Surface and interfacial properties of Fe-C-O-Cr alloys in contact with alumina VL - 56 IS - 2 SP - 143 EP - 151 PY - 2020 DO - 10.2298/JMMB190621005N AU - V. Novák AU - L. Řeháčková AU - P. Váňová AU - B. Smetana AU - K. Konečná AU - Ľ. Drozdová AU - S. Rosypalová AD - VSB – Technical University of Ostrava, Faculty of Materials Science and Technology, Ostrava – Poruba, Czech Republic AB - In this paper, temperature and concentration dependencies on density and surface tension of liquid Fe-C-O-Cr alloys (1.93 - 4.80 wt.% Cr) were investigated in high-temperature resistance observation furnace by a sessile drop method during heating from liquidus temperature to 1600 °C. The interfacial characteristics (interfacial tension, wetting angle, work of adhesion, and spreading coefficient) of liquid alloy/alumina system were also determined depending on temperature. The effect of temperature and chromium content on surface and interfacial properties was proven in case of all examined alloys. Based on the fact that the content of surface-active elements such as oxygen (up to 195 ppm) and sulfur (up to 545 ppm) was higher, the influence of activities of both mentioned elements on surface tension of alloy samples was assessed. Particular attention was paid to the dependence of the surface tension temperature coefficient on oxygen and sulfur activity. KW - Fe-C-O-Cr alloys KW - Surface and interfacial tension KW - Density KW - Wetting angle KW - Effect of chromium KW - Sessile drop method N1 - Correspondence Address: V. Novák, VSB – Technical University of Ostrava, Faculty of Materials Science and Technology, Ostrava – Poruba, Czech Republic, email: vlastimil.novak@vsb.cz N1 - J. Min. Metall. Sect. B-Metall. 56 (2) B (2020) 143-151. DOI:10.2298/JMMB190621005N PB - Technical Faculty in Bor SN - 14505339 (ISSN) LA - English J2 - J. Min. Metall. Sect. B Metall. M3 - Article ER