Thermo‐Mechanical Characterisation of Magnesia‐Carbon Refractories by Means of Wedge Splitting Test under Controlled Atmosphere at High‐Temperature

Brochen, Erwan; Dannert, C.; Quirmbach, P.

doi:10.1002/9781118837009.ch9

Cited by 5 publications

(5 citation statements)

References 1 publication

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“…The thermo-mechanical energy released during thermal shock may be sufficient to completely shatter the item or may produce less severe damage such as surface cracking, in which some strength is retained. In this respect, Hasselman's thermal shock theory attempts to relate material properties to resistance to catastrophic failure [3,4].…”

Section: Thermomechanical Spalling (Thermal Shock)mentioning

confidence: 99%

Properties of Taphole Refractories and Their Effect on Eaf Taphole Performance

Barrios,

Beale

2023

ABM Proceedings

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In electric arc furnaces, the lifetime of the taphole can be a critical factor in governing productivity and operational costs for the steelmaker. The field performance of tapholes can be investigated by developing a detailed understanding of the key material properties that govern taphole sleeve behaviour in the steelmaking process. In this application, high erosion resistance, oxidation resistance and thermal shock resistance are those key properties, and current taphole sleeve refractory material technology aims to maximize these attributes through formulation and material selection. The improvements in taphole refractory properties are expected to lead to more consistent and stable tapping times with increased taphole lifetime, reducing furnace down time and increasing productivity.

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Section: Thermomechanical Spalling (Thermal Shock)mentioning

confidence: 99%

Properties of Taphole Refractories and Their Effect on Eaf Taphole Performance

Barrios,

Beale

2023

ABM Proceedings

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“…2019, 9, At elevated temperatures, one possibility is to measure the displacement with an optical dilatometer. Here a halogen lamp illuminates the sample on one side and on the other side the shadow cast by the sample against the light source is recorded by a high-resolution complementary metal-oxide-semiconductor (CMOS) camera [3]. With this method, the displacement is measured on one side of the sample only.…”

Section: Devicementioning

confidence: 99%

“…The displacement is measured at the height where the rollers contact the load transmission elements. The sample rests on a linear support (3 × 3 × 90 mm 3 ) to allow for the free vertical displacement of the sample except for the support. The linear support, as well as the wedge and the rollers, are made of corundum to withstand the testing temperatures.…”

Section: Introductionmentioning

confidence: 99%

Wedge-Splitting Test on Carbon-Containing Refractories at High Temperatures

et al. 2019

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The mode I fracture behavior of ordinary refractory materials is usually tested with the wedge-splitting test. At elevated temperatures, the optical displacement measurement is difficult because of the convection in the furnace and possible reactions of refractory components with the ambient atmosphere. The present paper introduces a newly developed testing device, which is able to perform such experiments up to 1500 • C. For the testing of carbon-containing refractories a gas purging, for example, with argon, is possible. Laser speckle extensometers are applied for the displacement measurement. A carbon-containing magnesia refractory (MgO-C) was selected for a case study. Based on the results obtained from tests, fracture mechanical parameters such as the specific fracture energy and the nominal notch tensile strength were calculated. An inverse simulation procedure applying the finite element method yields tensile strength, the total specific fracture energy, and the strain-softening behavior. Additionally, the creep behavior was also considered for the evaluation.

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“…It is worth noting that the above cited references on WSTs conducted at high-temperatures did not use full-field measurements. A first case in which the Crack Mouth Opening Displacement (CMOD) was measured from images of MgO-C samples in WSTs up to 1500°C was reported by Brochen et al [41]. Moreover, to the authors' best knowledge, only one work reported WSTs analyzed with full-field measurements via DIC at a temperature of 1200°C) [42] on a commercial refractory for the calibration of a cohesive zone model.…”

Section: Introductionmentioning

confidence: 99%

On the effect of sintering temperature on the fracture energy of an Alumina-Mullite-Zirconia castable at 600 °C

Vargas

Pinelli

Smaniotto

et al. 2021

Journal of the European Ceramic Society

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Refractory castables are utilized in hazardous environments and thus their reliability should be accurately evaluated to avoid incidents. This work aims to measure the fracture energy of a high-alumina refractory with mullite-zirconia aggregates at 600°C. Wedge Splitting Tests were performed on 5 samples with different sintering temperatures. Images were acquired and analyzed via Digital Image Correlation (DIC). Notch Opening Displacements were used to evaluate the fracture energy at room and high tempartures. For the studied material, a 50°C increase in the sintering temperature increased about 30% the fracture energy of the material, which is also higher at 600°C when compared to room temperature measurements.

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Thermo‐Mechanical Characterisation of Magnesia‐Carbon Refractories by Means of Wedge Splitting Test under Controlled Atmosphere at High‐Temperature

Cited by 5 publications

References 1 publication

Properties of Taphole Refractories and Their Effect on Eaf Taphole Performance

Properties of Taphole Refractories and Their Effect on Eaf Taphole Performance

Wedge-Splitting Test on Carbon-Containing Refractories at High Temperatures

On the effect of sintering temperature on the fracture energy of an Alumina-Mullite-Zirconia castable at 600 °C

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Thermo‐Mechanical Characterisation of Magnesia‐Carbon Refractories by Means of Wedge Splitting Test under Controlled Atmosphere at High‐Temperature

Cited by 5 publications

References 1 publication

Properties of Taphole Refractories and Their Effect on Eaf Taphole Performance

Properties of Taphole Refractories and Their Effect on Eaf Taphole Performance

Wedge-Splitting Test on Carbon-Containing Refractories at High Temperatures

On the effect of sintering temperature on the fracture energy of an Alumina-Mullite-Zirconia castable at 600 °C

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Product

Resources

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On the effect of sintering temperature on the fracture energy of an Alumina-Mullite-Zirconia castable at 600 °C