Determination of cohesion and friction angle of a MgO-C refractory at room and elevated temperatures

Maximilian Klopf, Dietmar Gruber

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung


The use of constitutive models in thermomechanical finite element modelling of refractory linings requires knowing the temperature-dependent material parameters. The mechanical testing of carbon-containing refractory materials at elevated temperatures necessitates the protection of samples from oxidation. Therefore, the test concept of the modified shear test (MST) was further developed and a setup was designed to protect the carbon-containing materials from oxidation. A carbon-containing magnesia refractory (MgO–C), which is usually applied in secondary metallurgy for steel ladle refractory linings, was selected as the material of interest. The setup allows the determination of cohesion and friction angle of MgO–C refractories under reducing conditions at temperatures up to 1500 °C. The procedure allows a material parameters determination from uniaxial loading. While coked and as-delivered samples showed different behaviours, a significantly higher cohesion was noted in the as-delivered material. The results showed that the cohesion is highly temperature-dependent, whereas the friction angle remains nearly unaffected.
FachzeitschriftOpen ceramics
PublikationsstatusElektronische Veröffentlichung vor Drucklegung. - 9 Mai 2023

Bibliographische Notiz

Funding Information:
The authors gratefully acknowledge the funding support of K1-MET GmbH, metallurgical competence center. The research programme of the K1-MET competence center is supported by COMET (Competence Center for Excellent Technologies), the Austrian programme for competence centers. COMET is funded by the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology, the Federal Ministry for Labour and Economy , the Federal States of Upper Austria, Tyrol and Styria as well as the Styrian Business Promotion Agency (SFG) and the Standortagentur Tyrol. Furthermore, Upper Austrian Research GmbH continuously supports K1-MET. Beside the public funding from COMET , this research project is partially financed by the scientific partner Montanuniversitaet Leoben and the industrial partners RHI Magnesita GmbH, voestalpine Böhler Edelstahl GmbH and voestalpine Stahl GmbH.

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© 2023 The Authors

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