LIEGAUT, Caroline; BERTRAND, P.; MAILLE, Laurence; REBILLAT, Francis

doi:10.1016/j.jeurceramsoc.2022.02.029

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LIEGAUT, Caroline
Laboratoire des Composites Thermostructuraux [LCTS]

BERTRAND, P.

MAILLE, Laurence

Laboratoire des Composites Thermostructuraux [LCTS]

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Journal of the European Ceramic Society. 2022-07, vol. 42, n° 7, p. 3168-3182

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In space propulsion applications, the development of new ceramic matrix composites with improved resistance to oxidation and ablation at high temperature is needed and ultra-high temperature ceramics-based ones appear the most suitable. Combination of both powder impregnation (ZrB2, C) and liquid silicon infiltration enabled manufacturing of UHTC based matrices in Cf/C preforms with less than 10 vol% open porosity and various proportions and homogeneous distribution of C, ZrB2, SiC and Si. Oxidation behaviour was evaluated on composite structures using an oxyacetylene torch at temperatures higher than 2000 °C. Chemical analyses and microstructural observations before and after oxidation testing evidenced the protection ability of ZrB2-SiC-Si matrices thanks to the formation of multi-oxide scales which resisted even tested durations of 6 min and pointed the unharmful presence of residual 12 vol% silicon on the composite for use at high temperature under high gas flows.< Réduire

Mots clés en anglais

Ceramic matrix composites (CMC)

Oxidation

Oxyacetylene torch testing

Reactive melt infiltration (RMI)

UHTC

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UHTC-based matrix as protection for Cf/C composites: Original manufacturing, microstructural characterisation and oxidation behaviour at temperature above 2000 °C

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