Determination of cohesion and friction angle of a MgO-C refractory at room and elevated temperatures
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In: Open ceramics, Vol. 14.2023, No. June, 100369, 09.05.2023.
Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - Determination of cohesion and friction angle of a MgO-C refractory at room and elevated temperatures
AU - Klopf, Maximilian
AU - Gruber, Dietmar
N1 - Publisher Copyright: © 2023 The Authors
PY - 2023/5/9
Y1 - 2023/5/9
N2 - 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.
AB - 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.
KW - Cohesion
KW - Friction angle
KW - MgO–C refractory
UR - http://www.scopus.com/inward/record.url?scp=85158862638&partnerID=8YFLogxK
U2 - 10.1016/j.oceram.2023.100369
DO - 10.1016/j.oceram.2023.100369
M3 - Article
AN - SCOPUS:85158862638
VL - 14.2023
JO - Open ceramics
JF - Open ceramics
SN - 2666-5395
IS - June
M1 - 100369
ER -