Mechanical testing of directionally solidified eutectic ceramics (DSECs): specific problems and limitations

Valle, R.; Carroz, L.; Ritti, M.H.; Podgorski, M.; Parlier, M.

doi:10.1007/s10853-017-1203-6

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…Al 2 O 3 /YAG/ZrO 2 eutectic ingots of approximately 2.5 cm in diameter and 5 cm in length were grown in a three‐zone Bridgman‐Stockbarger furnace . Numerical modeling is performed for two experimental cases conducted at different pulling rates:

V = 5 mm/h

(Figure ) and

V = 80 mm/h

(Figure ).…”

Section: Resultsmentioning

confidence: 99%

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Growth rate effect on colony formation in directional solidification of Al₂O₃/YAG/ZrO₂

et al. 2018

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Mechanical properties of Al 2 O 3 /Y 3 Al 5 O 12 /ZrO 2 ternary eutectic ceramics are strongly affected by structural defects as pores or colonies. Experimental investigation of the microstructure of this ternary composite indicates that the colonies are generally observed when the solidification occurs at high rates. In this work, the influence of the growth rate on the solid-liquid interface shape and formation of colonies in directional solidification of Al 2 O 3 /Y 3 Al 5 O 12 /ZrO 2 by Bridgman, Edge-defined Film-fed Growth (EFG), and Czochralski (Cz) methods is numerically and experimentally investigated. Numerical modeling of the Bridgman growth process shows large curvatures of the solid-liquid interface when the pulling rate is increased up to 80 mm/h. The ingots solidified at rates between 5 and 80 mm/h exhibit colony type microstructure. The analysis of EFG growth of ceramic ribbons reveals less curved solid-liquid interfaces in this system. Numerical modeling shows significant increase in the interface curvature with increasing pulling rate. The microstructure of ribbons grown at pulling rates between 6 and 12 mm/h exhibits colonies only for the ingots solidified at higher rate. Simula-

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V = 5 mm/h

(Figure ) and

V = 80 mm/h

(Figure ).…”

Section: Resultsmentioning

confidence: 99%

“…Bridgman technique was used to elaborate large size eutectic ceramic crystals (2.5 cm in diameter) . The furnace contains two radio‐frequency heating elements that ensure a melting zone temperature up to 2473°K and a crystallization zone temperature up to 1873°K.…”

Section: Methodsmentioning

confidence: 99%

Growth rate effect on colony formation in directional solidification of Al₂O₃/YAG/ZrO₂

et al. 2018

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Effective elastic properties and residual stresses in directionally solidified eutectic Al2O3/YAG/ZrO2 ceramics estimated by finite element analysis

et al. 2017

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A review of Al2O3-based eutectic ceramics for high-temperature structural materials

Wang,

Zhong,

2024

Journal of Materials Science & Technology

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Mechanical testing of directionally solidified eutectic ceramics (DSECs): specific problems and limitations

Cited by 5 publications

References 31 publications

Growth rate effect on colony formation in directional solidification of Al₂O₃/YAG/ZrO₂

Growth rate effect on colony formation in directional solidification of Al₂O₃/YAG/ZrO₂

Effective elastic properties and residual stresses in directionally solidified eutectic Al2O3/YAG/ZrO2 ceramics estimated by finite element analysis

A review of Al2O3-based eutectic ceramics for high-temperature structural materials

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Mechanical testing of directionally solidified eutectic ceramics (DSECs): specific problems and limitations

Cited by 5 publications

References 31 publications

Growth rate effect on colony formation in directional solidification of Al2O3/YAG/ZrO2

Growth rate effect on colony formation in directional solidification of Al2O3/YAG/ZrO2

Effective elastic properties and residual stresses in directionally solidified eutectic Al2O3/YAG/ZrO2 ceramics estimated by finite element analysis

A review of Al2O3-based eutectic ceramics for high-temperature structural materials

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Growth rate effect on colony formation in directional solidification of Al₂O₃/YAG/ZrO₂

Growth rate effect on colony formation in directional solidification of Al₂O₃/YAG/ZrO₂