ROGER, Jerome; AVENEL, M.; LAPUYADE, Laurine

doi:10.1016/j.jeurceramsoc.2019.12.050

Laboratoire des Composites Thermostructuraux [LCTS]

AVENEL, M.
Laboratoire des Composites Thermostructuraux [LCTS]

LAPUYADE, Laurine
Laboratoire des Composites Thermostructuraux [LCTS]

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Article de revue

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Journal of the European Ceramic Society. 2020-05-01, vol. 40, n° 5, p. 1869-1876

Resumen en inglés

In Part A of this study, infiltrations experiments of porous SiC samples by hexadecane with pore-size distributions comprising small and large pores were realized. Two successive stages were identified during the filling of these samples corresponding to the infiltration of the two types of pores. The experimental data were successfully treated with a new analytical function. In Part B, it was found that this function can also be applied to the analysis of the mass gain during molten silicon infiltration at 1500 °C. Prior to silicon infiltration, it was found that the operating temperature induces a shift of the pore size distributions towards larger values. A dissolution-recrystallisation mechanism can also occur during the infiltration of silicon. During the first stage, liquid silicon fills rapidly larger pores than hexadecane. The kinetics are significantly larger with liquid silicon. Consequently, the durations for the complete filling are very short with molten silicon.< Leer menos

Palabras clave en inglés

SiC

Molten silicon

Microstructure evolution

Infiltration kinetic

Washburn equation

URI

https://oskar-bordeaux.fr/handle/20.500.12278/110132

DOI

http://dx.doi.org/10.1016/j.jeurceramsoc.2019.12.050

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Laboratoire des Composites Thermo Structuraux (LCTS) - UMR 5801

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Characterization of SiC ceramics with complex porosity by capillary infiltration: Part B – Filling by molten silicon at 1500 °C

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Resumen en inglés

Palabras clave en inglés

URI

DOI

Centros de investigación