Journal of Inorganic Materials ›› 2011, Vol. 26 ›› Issue (7): 701-706.doi: 10.3724/SP.J.1077.2011.00701

• Research Paper • Previous Articles     Next Articles

Fabrication and Water-vapor Corrosion Resistance of Ba0.25Sr0.75Al2Si2O8 Environmental Barrier Coating

LU Lin-Jing, CHENG Lai-Fei, HONG Zhi-Liang, WANG Yi-Guang, ZHANG Li-Tong   

  1. LU Lin-Jing, CHENG Lai-Fei, HONG Zhi-Liang, WANG Yi-Guang, ZHANG Li-Tong
  • Received:2010-09-09 Revised:2010-10-21 Online:2011-07-20 Published:2011-06-20
  • Contact: CHENG Lai-Fei E-mail:chenglf@nwpu.edu.cn
  • Supported by:

    National Natural Science Foundation of China (51032006, 50820145202)

Abstract: Ba0.25Sr0.75Al2Si2O8 (BSAS) as environmental barrier coating (EBC) was coated on the 2D Cf/SiC substrate using slurry-brushing process. The water-vapor corrosion resistance of Cf/SiC and Cf/SiC-BSAS were studied in 50%H2O-50%O2 water vapor under atmospheric pressure and static atmosphere at 1250℃, respectively. The results show that the dense BSAS coating with free cracks can be prepared by slurry-brushing method followed by heat-treatment at 1350℃ in high purity argon. The coating thickness approximate to 15μm after pasted once, and can reach 50μm after pasted for three times. The weight and flexural strength of Cf/SiC-SiC decreases greatly, while the weight of Cf/SiC-BSAS has no obvious change and the flexural strength retention is over 90% after corroded for 100 h.

Key words: environmental barrier coating, slurry, BSAS, water vapor corrosion

CLC Number: 

  • TB323