High-temperature tensile strength of alumina-spinel refractory by Brazilian test at 1200°C coupled with DIC in-situ monitoring - Archive ouverte HAL
Article Dans Une Revue Journal of the European Ceramic Society Année : 2024

High-temperature tensile strength of alumina-spinel refractory by Brazilian test at 1200°C coupled with DIC in-situ monitoring

Résumé

This study investigated for the first time the corrosion effect of Al2O3-MgAl2O4 refractory by steel ladle slag using a DIC-coupled Brazilian test at 1200 °C. Three types of alumina-spinel materials were used in the test, namely, original non-infiltrated refractory, slag-infiltrated at 1450 °C as well as postmortem refractory after 69 cycles of work in the sidewalls of steel ladle. Lab infiltration was conducted at 1450 °C using CaO-Al2O3-SiO2-based ladle slag and its analog enriched with manganese (10 % MnO). The tensile strength of postmortem material at 1200 °C was the highest at 10.7 MPa, and it was 52 % and 70 % higher than for reference and MnO-enriched slag, respectively, and 80 % higher than for original refractory. The significantly raised tensile strength of slag-infiltrated materials vs. original non-infiltrated brick was directly related to the densification of microstructure by corrosion products (mainly CA6, CA2, Fe) which caused the infiltrated materials to be stiffer and with a more brittle nature to fracture.
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Dates et versions

hal-04567456 , version 1 (03-05-2024)

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Sina Darban, Ilona Jastrzębska, Jean Gillibert, Ryszard Prorok, Thomas Sayet, et al.. High-temperature tensile strength of alumina-spinel refractory by Brazilian test at 1200°C coupled with DIC in-situ monitoring. Journal of the European Ceramic Society, 2024, ⟨10.1016/j.jeurceramsoc.2024.04.037⟩. ⟨hal-04567456⟩
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