Development of an Ultra-Low Carbon MgO Refractory Doped with α-Al2O3 Nanoparticles for the Steelmaking Industry: A Microstructural and Thermo-Mechanical Study

Gómez Rodríguez, C. y Castillo Rodríguez, G. A. y Rodríguez Castellanos, E. A. y Vázquez Rodríguez, F. J. y López Perales, J. F. y Aguilar Martínez, J. A. y Fernández González, D. y García Quiñonez, L. V. y Das Roy, T. K. y Verdeja, L. F. (2020) Development of an Ultra-Low Carbon MgO Refractory Doped with α-Al2O3 Nanoparticles for the Steelmaking Industry: A Microstructural and Thermo-Mechanical Study. Materials, 13 (3). pp. 1-22. ISSN 1996-1944

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URL o página oficial: http://doi.org/10.3390/ma13030715

Resumen

The effect of α-Al2O3 nanoparticles (up to 5 wt.%) on the physical, mechanical, and thermal properties, as well as on the microstructural evolution of a dense magnesia refractory is studied. Sintering temperatures at 1300, 1500, and 1600 °C are used. The physical properties of interest were bulk density and apparent porosity, which were evaluated by the Archimedes method. Thermal properties were examined by differential scanning calorimetry. The mechanical behavior was studied by cold crushing strength and microhardness tests. Finally, the microstructure and mineralogical qualitative characteristics were studied by scanning electron microscopy and X-ray diffraction, respectively. Increasing the sintering temperature resulted in improved density and reduced apparent porosity. However, as the α-Al2O3 nanoparticle content increased, the density and microhardness decreased. Microstructural observations showed that the presence of α-Al2O3 nanoparticles in the magnesia matrix induced the magnesium-aluminate spinel formation (MgAl2O4), which improved the mechanical resistance most significantly at 1500 °C.

Tipo de elemento: Article
Palabras claves no controlados: magnesia, refractarios, nanopartículas de α-al2o3, espinela de magnesio-alúmina, sinterización
Materias: T Tecnología > TA Ingeniería General y Civil
Divisiones: Ingeniería Mecánica y Eléctrica
Usuario depositante: Editor Repositorio
Creadores:
CreadorEmailORCID
Gómez Rodríguez, C.NO ESPECIFICADONO ESPECIFICADO
Castillo Rodríguez, G. A.NO ESPECIFICADONO ESPECIFICADO
Rodríguez Castellanos, E. A.NO ESPECIFICADONO ESPECIFICADO
Vázquez Rodríguez, F. J.NO ESPECIFICADONO ESPECIFICADO
López Perales, J. F.NO ESPECIFICADONO ESPECIFICADO
Aguilar Martínez, J. A.NO ESPECIFICADONO ESPECIFICADO
Fernández González, D.NO ESPECIFICADONO ESPECIFICADO
García Quiñonez, L. V.NO ESPECIFICADONO ESPECIFICADO
Das Roy, T. K.NO ESPECIFICADONO ESPECIFICADO
Verdeja, L. F.NO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 21 Sep 2022 21:15
Última modificación: 21 Sep 2022 21:15
URI: http://eprints.uanl.mx/id/eprint/23932

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