Multilayer oxidation protective coating for C/C composites from room temperature to 1500 degrees C

作者：Fu Qian-Cang^*; Li He-Jun; Wang Yong-Jie; Li Ke-Zhi; Tao Jun

来源：Surface and Coatings Technology, 2010, 204(11): 1831-1835.

DOI：10.1016/j.surfcoat.2009.11.026

• Composites materials
• Coating
• Oxidation

To prevent carbon/carbon (C/C) composites from oxidation, a multilayer oxidation resistant coating was prepared. The inner SiC coating was prepared by pack cementation, and the outer SiC-MoSi2 three-layer coating was obtained by slurry coating using silicon-sol as the caking agent. X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy were used to analyze the phase, microstructure and element distribution of the as-prepared coating. The results show that, the as-received multilayer coating has a crack-free structure with the thickness of about 300 pm. It is provided with excellent oxidation resistance from room temperature to 1500 degrees C in air and can protect C/C composites from oxidation for more than 120 h at 900 degrees C and more than 110 h at 1500 degrees C in air. The weight loss of the coated samples during oxidation tests mainly resulted from the oxidation Of Mo5Si3 and the volatilization Of SiO2 in the coating.

• 出版日期2010-2-25
• 单位西北工业大学