Mechanical behaviour of MgO–C refractory bricks evaluated by stress–strain curves

Musante, Leonardo; Martorello, Leandro; Galliano, Pablo; Cavalieri, A.L.; Martínez, A.G. Tomba

doi:10.1016/j.ceramint.2012.01.062

Cited by 29 publications

(10 citation statements)

References 15 publications

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“…Another remarkable aspect of the mechanical behavior of these refractories is the thermal dependency, which has been widely studied by several authors for MgO-C bricks, with and without antioxidants [5][6][7][8][9][10][11][12][13][14][15][16][17]. The influence of the microstructural and textural evolution caused by the reactions taking place within the material (carbonization of the organic binder, direct graphite oxidation, formation of carbide, nitride or oxides, spinel formation) has been well established.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical behaviour of Al2O3–MgO–C refractories under non-oxidizing atmosphere

Muñoz

Martínez

2015

Ceramics International

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Section: Introductionmentioning

confidence: 99%

Thermomechanical behaviour of Al2O3–MgO–C refractories under non-oxidizing atmosphere

Muñoz

Martínez

2015

Ceramics International

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“…Muñoz et al and Musante et al explained the increase in strength with temperature for MgO–C and Al 2 O 3 –MgO–C refractories with the formation of a new hardening phase at certain temperatures. These phases are formed due to addition of antioxidants, which was not the case for the material tested in this study.…”

Section: Discussionmentioning

confidence: 98%

High‐Temperature Compression Deformation Behavior of Fine‐Grained Carbon‐Bonded Alumina

et al. 2016

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Carbon-bonded alumina with 33 wt% residual carbon was tested in compression at room temperature and at temperatures between 700°C and 1500°C in quasi-static tests, creep tests, and stress relaxation tests. Therefore, a new high-temperature test set up with inert gas chamber and inductive heating was used. The tests were accomplished by investigations of microstructure and Young's modulus. At room temperature, the results exhibit a pronounced hysteresis for the first loading cycle, which almost completely disappeared in subsequent cycles. The creep tests showed characteristic curves for compression whereas primary and secondary (stationary) creep occurred. Above 1000°C, a strong increase in creep rate was detected, whereas almost no creep was observed below this temperature. All creep curves were approximated with the models of logarithmic and Andrade creep. The activation energy for creep was found to be 263 kJ/mol above 1150°C. The resistance against stress relaxation showed an anomaly with a minimum between 1000°C to 1200°C and a maximum between 1300°C and 1400°C.M. Rigaud-contributing editor Manuscript No. 37046.

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“…This effect has been mitigated since the development of magnesia-carbon (MgO-C) refractory in the 1970s, whereby the thermal properties of magnesia have been controlled and improved. A high thermal conductivity, excellent thermal shock resistance, as well as good corrosion resistance can be achieved in this kind of refractory [6][7][8][9][10][11][12][13]. Therefore, the mechanical and chemical properties exhibited by carbon-containing refractories have allowed them to be widely used to form specific compounds for certain applications in the steel industry.…”

Section: Introductionmentioning

confidence: 99%

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

Castillo-Rodríguez

Rodríguez-Castellanos

et al. 2020

Materials

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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.

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Mechanical behaviour of MgO–C refractory bricks evaluated by stress–strain curves

Cited by 29 publications

References 15 publications

Thermomechanical behaviour of Al2O3–MgO–C refractories under non-oxidizing atmosphere

Thermomechanical behaviour of Al2O3–MgO–C refractories under non-oxidizing atmosphere

High‐Temperature Compression Deformation Behavior of Fine‐Grained Carbon‐Bonded Alumina

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

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