Microstructure and mechanical behavior of alumina–zirconia–mullite refractory materials

Carbajal, G.I. Vázquez; Rodríguez-Galicia, José L.; Ángeles, J.C. Rendón; López-Cuevas, J.; Chavarría, C. A. Gutiérrez

doi:10.1016/j.ceramint.2011.09.051

Cited by 19 publications

(3 citation statements)

References 12 publications

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“…Another important group of refractories are those containing zirconia, alumina and silica (AZS) prepared via electrofusion-casting. The addition of zirconia (between 30 and 42 wt%) to aluminosilicate refractories was introduced at the beginning of the last century, to improve the corrosion resistance in glass furnaces [21,22]. A characteristic of the electro-melted refractories is their minimum porosity (1-2%), being this feature of great importance as it minimizes the glass-refractory interface [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Alkali-activated refractory wastes exposed to high temperatures: development and characterization

Coppola

Tardivat

Richaud

et al. 2020

Journal of the European Ceramic Society

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The feasibility to prepare alkali-activated materials starting from refractory wastes and their properties after exposure to high temperatures (800, 1000, 1200 and 1400 °C) were investigated. Two different aluminosilicate wastes were used: chamotte (CH, mainly composed of corundum, mullite and andalusite) and alumina-zirconia-silica (AZS, composed by baddeleyite, corundum and amorphous silica). Very high mechanical properties were achieved in both cases (28-days compressive strength of approx. 70 and 60 MPa for CH-and AZS-based pastes, respectively). Then, alkali-activated pastes were exposed to high temperatures. For both kinds of samples, a sharp increase of mechanical properties was obtained after exposure to 800 and 1000 °C thanks to the matrix densification. Above 1000 °C viscous sintering occurs leading to a further increase of mechanical properties. AZS-based materials were able to withstand high temperatures up to 1400 °C while CH-based pastes mechanical properties decrease at 1400 °C due to andalusite decomposition.

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Section: Introductionmentioning

confidence: 99%

Alkali-activated refractory wastes exposed to high temperatures: development and characterization

Coppola

Tardivat

Richaud

et al. 2020

Journal of the European Ceramic Society

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“…The requirements to be met in the glass manufacturing industry are good physical and mechanical resistance to the thermal shock of the working temperatures, and resistance to attack by molten glass which can dissolve the refractory, modifying its properties [1][2][3][4]. The glass industry has made significant progress regarding the type of materials used to manufacture it, this is undoubtedly due to the change of clay-based refractory materials and prepared by pressing and electrocast materials sintering, this change in the manufacturing process was introduced by Fulcher in 1925 based on research conducted at Corning Glass Co. A characteristic of the electro melted manufacturing is that the materials have a minimum porosity (1-2%), this is of great importance to the refractory, since this minimizes the glass-refractory interface [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Corrosion–erosion wear of refractory bricks in glass furnaces

Guzmán

Martínez

González

2014

Engineering Failure Analysis

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“…[4][5][6][7][8] Generally, the mullite-zirconia composites can be produced by various methods such as direct powder compact of mullite and zirconia, reaction sintering of alumina, silica and zirconia and reaction sintering of alumina and zircon. [9][10][11][12] In this work, the mullite-zirconia composite was prepared by mixing mullite powder with yttria stabilised zirconia in various compositions in order to study the direct effect of zirconia on mullite powder compact. Density, mechanical strength and thermal behaviour have been studied as a function of zirconia content and sintering temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of zirconia content on mechanical and thermal properties of mullite–zirconia composite

Hemra

Aungkavattana

2014

Advances in Applied Ceramics: Structural, Functional and Biocer

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Mullite-zirconia composites were prepared by adding various zirconia contents in the mullite ranging from 0 to 30 wt-% and sintering at 1400-1600uC for 2 h. The phase composition examined by X-ray diffraction showed that mullite was the major phase combined with developed t-ZrO 2 and m-ZrO 2 phase as a function of zirconia content, especially at 1600uC, wherein m-ZrO 2 predominated. Density increased when the zirconia content and sintering temperature were increased ranging from 2?2 to 3?53 g cm 23 . The morphology of mullite grain showed elongated grains, whereas dispersed zirconia showed equiaxed and intergranular grains. Flexural strength was continuously improved by adding zirconia during the sintering temperature ranging from 1400 to 1500uC, whereas flexural strength was initially improved up to 5 wt-% of zirconia addition and deteriorated with more than 5 wt-% of zirconia content during sintering between 1550 and 1600uC. The maximum strength, 190 MPa, was obtained when sintering mullite with 30 wt-% of zirconia content at 1500uC. The degradation of strength at high sintering temperature may be a result from more occurrence of m-ZrO 2 phase. Thermal expansion of sintered specimens indicated linear change and hysteresis loop change. The hysteresis loop obtained with increased zirconia content resulted in the t-m phase transformation. Martensitic start temperature M s was determined to be 530uC for 15 wt-% zirconia sintered at 1500uC, implying that the t-m phase transformation occurred.

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Microstructure and mechanical behavior of alumina–zirconia–mullite refractory materials

Cited by 19 publications

References 12 publications

Alkali-activated refractory wastes exposed to high temperatures: development and characterization

Alkali-activated refractory wastes exposed to high temperatures: development and characterization

Corrosion–erosion wear of refractory bricks in glass furnaces

Effect of zirconia content on mechanical and thermal properties of mullite–zirconia composite

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