Microstructure and mechanical properties of fine grained carbon-bonded Al 2 O 3 –C materials

Klemm, Yvonne; Biermann, Horst; Aneziris, Christos G.

doi:10.1016/j.ceramint.2013.01.108

Cited by 21 publications

(22 citation statements)

References 4 publications

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“…The hydrophilicity of coated graphite helped to consume less water in C+ to attain proper consistency; consequently the apparent porosity and cold crushing strength at 900ȗC are remarkably improved in the same. During hydration of cement CAH 10 Peaks for corundum as well as hydrated alumina have also been identified from the plot due to the presence of alumina based aggregates and reactive alumina fines present in the matrix. After heat treatment at 1200°C the hydrated cementitious phases are converted to calcium aluminate and calcium dialuminate after complete dewatering.…”

Section: Resultsmentioning

confidence: 99%

Significant improvement of refractoriness of Al2O3–C castables containing calcium aluminate nano-coatings on graphite

Dutta

Das

et al. 2014

Ceramics International

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Section: Resultsmentioning

confidence: 99%

Significant improvement of refractoriness of Al2O3–C castables containing calcium aluminate nano-coatings on graphite

Dutta

Das

et al. 2014

Ceramics International

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“…6), it could be seen that the actual fracture propagation was intragranular. Regarding the amount of size distribution of pores, the applied pressure while the clay is shaped gives different pore size and morphologies [26]. In pressed sample, it could be seen the shape of the pores rounded and elongated, and the average size was between 2 and 15 µm for the rounded ones and 6 to 10 µm for the elongated ones.…”

Section: Shaped Ceramicmentioning

confidence: 92%

Comparative evaluation of properties of a clay based ceramic shaped via four techniques

Torres¹,

Rendtorff²,

Cipollone

et al. 2018

Cerâmica

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The results of qualitative and quantitative properties of clay based ceramic are presented in this work. Four different shaping methods and sintering temperatures were used to understand their influence in the final properties of a ceramic material formulated using kaolinite clay and calcined alumina. This material can be used as a structural ceramic for different applications, and there is no pre-established relation between the forming method and the final sintered properties. Forming methods used to prepare the samples were uniaxial pressing (a batch process that allows application in dry samples), extruding (a continuous process that requires moisture), slip casting (a process that allows to shape complex ceramic ware), and lamination (a batch process that requires moisture). Sintering temperatures were in the range of 1100 and 1400 °C. In order to compare how properties behave as the shaping method and sintering temperature change, textural properties, shrinkage, porosimetry, phase composition and mechanical strength were evaluated and analyzed. Scanning electron microscopy and microtomography were employed for analyzing and comparing the developed microstructures. Differences in the resulting properties are explained in terms of the developed crystalline phases and microstructure. Keywords: clay based ceramics, shaping, sintering, properties. Resumo Resultados das propriedades qualitativas e quantitativas de cerâmica à base de argila são apresentados neste trabalho. Foram utilizados quatro diferentes métodos de conformação e temperaturas de sinterização para entender suas influências nas propriedades finais de um material cerâmico formulado usando argila caulinítica e alumina calcinada. Este material pode ser usado como cerâmica estrutural para diferentes aplicações, e não há relação pré-estabelecida entre o método de conformação e as propriedades sinterizadas finais. Os métodos de conformação utilizados para preparar as amostras foram prensagem uniaxial (processo em batelada que permite a aplicação em amostras secas), extrusão (processo contínuo que requer umidade), colagem (processo que permite moldar produtos cerâmicos complexos) e laminação (processo em batelada que requer umidade

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“…As it can be seen in Table 1, the slurry compositions of casted and pressed materials differ slightly. However, on both production routes the mass fraction of the high melting coal-tar resin Carbores ® P was changed gradually (10,15, and 20 wt%). The modified coal-tar pitch powder (Carbores ® P, R€ utgers, Germany) acts as a binder and as a carbon source at the same time.…”

Section: Sample Preparationmentioning

confidence: 99%

“…This was confirmed by lateral cuts as shown in Figure 3, which have been made of various samples with 10, 20, and 30 wt% Carbores ® P. Once again this indicates a higher rate of compression for the pressed materials. [15] It has to be mentioned that the pressed sample containing 30 wt% Carbores ® P showed lamination cracks. In contrast, 30 wt% Carbores ® P results into the presence of macropores in the diameter range of 1-100 mm.…”

Section: Densities and Mean Pore Diametersmentioning

confidence: 99%

“…Lateral cuts also support the tendency of an enlargement of the mean pore diameter in the range of approximately 200 to 400 nm with a rising Carbores ® P wt% ratio for the casted materials. [15] Because of that these samples have not been measured. Both effects might arise from the increased amount of released volatiles in combination with a higher thermal stress during pyrolysis.…”

Section: Densities and Mean Pore Diametersmentioning

confidence: 99%

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Thermophysical Properties of Pressed and Casted Carbon‐Bonded Alumina (Al₂O₃‐C) up to 800 °C

et al. 2013

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Carbon-bonded alumina manufactured by use of a novel binding system Carbores ® P are among the most promising materials for future high temperature industry products. Their secure application is based on an accurate knowledge of their thermophysical properties. In this work, an experimental investigation will be presented for the determination of the coefficient of thermal expansion, thermal diffusivity, specific heat, and thermal conductivity within a temperature range up to 800°C. Experiments are represented for materials containing various mass fractions of Carbores ® P, produced through various processes. It is found that the coefficient of thermal expansion and thermal conductivity are decreased by an increasing mass fraction of Carbores ® P, while the specific heat is not affected.

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Microstructure and mechanical properties of fine grained carbon-bonded Al 2 O 3 –C materials

Cited by 21 publications

References 4 publications

Significant improvement of refractoriness of Al2O3–C castables containing calcium aluminate nano-coatings on graphite

Significant improvement of refractoriness of Al2O3–C castables containing calcium aluminate nano-coatings on graphite

Comparative evaluation of properties of a clay based ceramic shaped via four techniques

Thermophysical Properties of Pressed and Casted Carbon‐Bonded Alumina (Al₂O₃‐C) up to 800 °C

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Microstructure and mechanical properties of fine grained carbon-bonded Al 2 O 3 –C materials

Cited by 21 publications

References 4 publications

Significant improvement of refractoriness of Al2O3–C castables containing calcium aluminate nano-coatings on graphite

Significant improvement of refractoriness of Al2O3–C castables containing calcium aluminate nano-coatings on graphite

Comparative evaluation of properties of a clay based ceramic shaped via four techniques

Thermophysical Properties of Pressed and Casted Carbon‐Bonded Alumina (Al2O3‐C) up to 800 °C

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Product

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Thermophysical Properties of Pressed and Casted Carbon‐Bonded Alumina (Al₂O₃‐C) up to 800 °C