ON WETTING OF DENSE ALUMINA SUBSTRATE BY LOW ALLOY STEEL CONTAINING OXYGEN

1 NOVÁK Vlastimil
Co-authors:
1 ŘEHÁČKOVÁ Lenka 1 ROSYPALOVÁ Silvie 1 MATÝSEK Dalibor 1 SMETANA Bedřich 1 TKADLEČKOVÁ Markéta 1 SNIEGOŇ Michal 1 VÁŇOVÁ Petra 1 KONEČNÁ Kateřina 1 DROZDOVÁ Ľubomíra
Institution:
1 VSB -Technical University of Ostrava, Ostrava, Czech Republic, EU, vlastimil.novak@vsb.cz
Conference:
30th Anniversary International Conference on Metallurgy and Materials, Brno, Czech Republic, EU, May 26 - 28, 2021
Proceedings:
Proceedings 30th Anniversary International Conference on Metallurgy and Materials
Pages:
133-139
ISBN:
978-80-87294-99-4
ISSN:
2694-9296
Published:
15th September 2021
Proceedings of the conference have been sent to Web of Science and Scopus for evaluation and potential indexing.
Metrics:
27 views / 16 downloads
Abstract

This investigation was carried out to determine the wetting characteristics of low alloy steel grades that contained, among other elements, chromium around 5 wt.% and oxygen up to approximately 400 ppm. The tests were performed from the melting temperature to a temperature of 1,600 °C using a high-temperature observation furnace CLASIC operating under non-oxidizing conditions. The influence of oxygen on the examined steel's wetting behavior, i.e., the temperature dependence of surface tension and wetting angle, was found and verified by statistical analysis using the Kruskal-Wallis test. In addition, the phase transition temperatures, ascertained from DTA measurements, were in strong correlation with those theoretically calculated. To provide better insight into the wetting mechanism, SEM/EDX analyses of the wetted alumina surface and of the vertical cross-section of the steel/alumina interface were made using a scanning electron microscope (SEM) JEOL 6490 LV. Beyond the mentioned techniques, the study was accompanied by calculations performed in FactSage oxide database.

Keywords: Wetting, phase interface, chromium, oxygen, steel

© 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.

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