FU Qian-gang, XUE Hui, LI He-jun, LI Ke-zhi, SHI Xiao-hong, ZHAO Hua. Anti-oxidation property of a multi-layer coating for carbon/carbon composites in a wind tunnel at 1500℃. New Carbon Mater., 2010, 25(04): 285-290. doi: 10.1016/S1872-5805(09)60033-0
Citation:
FU Qian-gang, XUE Hui, LI He-jun, LI Ke-zhi, SHI Xiao-hong, ZHAO Hua. Anti-oxidation property of a multi-layer coating for carbon/carbon composites in a wind tunnel at 1500℃. New Carbon Mater., 2010, 25(04): 285-290. doi: 10.1016/S1872-5805(09)60033-0
FU Qian-gang, XUE Hui, LI He-jun, LI Ke-zhi, SHI Xiao-hong, ZHAO Hua. Anti-oxidation property of a multi-layer coating for carbon/carbon composites in a wind tunnel at 1500℃. New Carbon Mater., 2010, 25(04): 285-290. doi: 10.1016/S1872-5805(09)60033-0
Citation:
FU Qian-gang, XUE Hui, LI He-jun, LI Ke-zhi, SHI Xiao-hong, ZHAO Hua. Anti-oxidation property of a multi-layer coating for carbon/carbon composites in a wind tunnel at 1500℃. New Carbon Mater., 2010, 25(04): 285-290. doi: 10.1016/S1872-5805(09)60033-0
FU Qian-gang(1979-), male, Aassociate Professor, specialize in antioxidation of C/C composites. Tel:+86-29-88494197|fax:+86-29-88495764, E-mail: fuqiangang@nwpu.edu.cn
To protect carbon/carbon (C/C) composites against oxidation at 1500℃ in a wind tunnel, a multi-layer coating was prepared on them by a combination of pack cementation, chemical vapor deposition and slurry coating. X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy were used to analyze the phase, microstructure and elemental distribution of the coating. Results show that a three-layer structure is formed including a multi-phase MoSi2-SiC-Si inner layer, a SiC middle layer and a borosilicate glass outer layer with thicknesses of about 80, 20 and 80μm, respectively. The three-layer coating can protect the C/C composites from failure at 1500℃ for 53 h in a wind tunnel. The cracking of the coating by thermal shock and gas-fired impact is the main cause for the failure of the coating.