Mo–Si–BALLOYS OXIDATION PROTECTIVE COATING FORSiC-COATED CARBON/CARBON COMPOSITES

Tao Feng, He-Jun Li (), Qian-Gang Fu, Xiao-Hong Shi and Ke-Zhi Li
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Tao Feng: C/C Composites Research Center, Department of Materials, Northwestern Polytechnical University, Xi'an Shaanxi 710072, PR China
He-Jun Li: C/C Composites Research Center, Department of Materials, Northwestern Polytechnical University, Xi'an Shaanxi 710072, PR China
Qian-Gang Fu: C/C Composites Research Center, Department of Materials, Northwestern Polytechnical University, Xi'an Shaanxi 710072, PR China
Xiao-Hong Shi: C/C Composites Research Center, Department of Materials, Northwestern Polytechnical University, Xi'an Shaanxi 710072, PR China
Ke-Zhi Li: C/C Composites Research Center, Department of Materials, Northwestern Polytechnical University, Xi'an Shaanxi 710072, PR China

Surface Review and Letters (SRL), 2009, vol. 16, issue 02, 223-229

Abstract: A novelMo–Si–Bdouble-layer coating was prepared for the carbon/carbon (C/C) composites by pack cementation in an argon atmosphere. The structures of the double-layer coatings were characterized by XRD and SEM. The as-received coating shows an excellent oxidation resistance at high and intermediate temperature. It could effectively protectC/Ccomposites from oxidation for 30 h with a weight loss of 0.9% in air at 1873 K, and for 25 h with a weight loss of l.7% at 1173 K. The oxidation protective coating was principally due to producing eutectic glass film for decreasing oxygen diffusing through the penetrable cracks in the coating.

Keywords: Carbon/carbon composites; coating; borosilicate glass; oxidation (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09012524

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