ABLATION PROPERTY OFSiC-TaSi2COATED CARBON/CARBON COMPOSITES

Shuping Li, Kezhi Li and Hejun Li
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Shuping Li: School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China;
Kezhi Li: School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
Hejun Li: School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China

Surface Review and Letters (SRL), 2010, vol. 17, issue 05n06, 487-491

Abstract: To prevent the carbon/carbon (C/C) composites from ablation, a new type of ablation protective coating was prepared on the surface of theC/Ccomposites by a step pack cementation technique. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis show, the coatings obtained by pack cementation were silicon carbide/tantalum silicide (SiC-TaSi2). The ablation behavior of the coated samples were evaluated by the oxyacetylene flame. The results show that, theSiC-TaSi2coating can improve the anti-ablative properties ofC/Ccomposites effectively. The mass ablation rate for the coatedC/Ccomposites was only 7.7 × 10-4g/s, which was lower by 79% than that of theC/Ccomposites after ablation for 30 s.

Keywords: C/Ccomposites; ablation; coating; silicon carbide-tantalum silicide (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1142/S0218625X10014302

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