Phase constitutions of Mo-Si-N anti-oxidation multi-layer coatings on C-C composites by fused slurry

作者：Lai Z H^*; Zhu J C; Jeon J H; Zhang B; Yu J

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2009, 499(1-2): 267-270.

DOI：10.1016/j.msea.2007.11.138

• C/C composites
• Coating
• Anti-oxidation
• Microstructures
• Fused slurry

To improve the oxidation resistance of Mo-Si fused slurry coating fabricated in vacuum, Mo-Si-N multi-layer coatings were synthesized on C/C composites in nitrogen atmosphere by fused slurry using same Mo and Si element powders. The phase compositions and microstructures were characterized by X-ray diffractometry (XRD), optical microscopy (OM), scanning electron microscopy (SEM) with energy-dispersive spectroscopy (EDS). The results indicate that the Mo-Si-N coating contains SiC inner layer and MoSi(2)/Si main layer, which was similar with Mo-Si coating. Additionally, a thin outer layer with nano-filiform morphology has been found on the coating surface, which consists of SiC, Si(3)N(4), AlN, Al(2)O(3) and sialon phase. Oxidation experiments show that the Mo-Si-N multi-layer coating exhibits excellent oxidation resistance at 1400 degrees C and anti-oxidizing potential ability at 1450 degrees C.

• 出版日期2009-1-15
• 单位哈尔滨工业大学