Synthesis and characterization of monolithic CVD-SiC tubes - Archive ouverte HAL
Article Dans Une Revue Journal of the European Ceramic Society Année : 2016

Synthesis and characterization of monolithic CVD-SiC tubes

Résumé

† The authors dedicate this article to the memory of our colleague P. Weisbecker who has recently passed away Abstract : The high open porosity of SiC/SiC composites is problematic for uses in advanced thermal or confinement systems. A strong and gas-tight SiC sheath would helpfully complete the composite structure. The aim of this work was to prepare and characterize long, free standing and high strength SiC tubes prepared through a rapid near net shape manufacturing process. The tubes were produced by continuous chemical vapor deposition (CVD) at atmospheric pressure using CH 3 SiHCl 2 /C 3 H 6 /H 2 mixtures. The composition, morphology and microstructure of the CVD-SiC tubes were analyzed in details. The Si/C ratio and crystalline state through wall thickness are related to the progress of gas phase reactions during continuous deposition. The silicon excess in the CVD-SiC coating can be reduced by preheating gases and adding C 3 H 6. C-ring specimens cut from the obtained tubes were submitted to compressive tests at room and high temperature to assess the failure properties and thermomechanical behavior.
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Dates et versions

hal-01629906 , version 1 (06-11-2017)

Identifiants

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Patxi Drieux, Georges Chollon, Sylvain Jacques, Guillaume Couégnat, Stéphane Jouannigot, et al.. Synthesis and characterization of monolithic CVD-SiC tubes. Journal of the European Ceramic Society, 2016, 36 (8), pp.1873 - 1883. ⟨10.1016/j.jeurceramsoc.2016.02.024⟩. ⟨hal-01629906⟩
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