Ba0.25Sr0.75Al2Si2O8环境障碍涂层的制备与耐水腐蚀性能研究

doi:10.3724/SP.J.1077.2011.00701

无机材料学报 ›› 2011, Vol. 26 ›› Issue (7): 701-706.DOI: 10.3724/SP.J.1077.2011.00701

Ba_0.25Sr_0.75Al₂Si₂O₈环境障碍涂层的制备与耐水腐蚀性能研究

鲁琳静, 成来飞, 洪智亮, 王一光, 张立同

(西北工业大学超高温结构复合材料国防科技重点实验室, 西安 710072)

收稿日期:2010-09-09 修回日期:2010-10-21 出版日期:2011-07-20 网络出版日期:2011-06-20
作者简介:鲁琳静(1986-), 女, 硕士研究生. E-mail: bifrost_07@yahoo.com.cn
基金资助:
国家自然科学基金(51032006, 50820145202)

Fabrication and Water-vapor Corrosion Resistance of Ba_0.25Sr_0.75Al₂Si₂O₈ Environmental Barrier Coating

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

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

Received:2010-09-09 Revised:2010-10-21 Published:2011-07-20 Online:2011-06-20
Supported by:
National Natural Science Foundation of China (51032006, 50820145202)

摘要/Abstract

摘要： 以2D C_f/SiC为基底材料, 采用浆料刷涂工艺制得Ba_0.25Sr_0.75Al₂Si₂O₈(BSAS)环境障碍涂层, 并研究了未涂覆BSAS涂层(Cf/SiC)和涂覆BSAS涂层(C_f/SiC-BSAS)的两种试样的耐水腐蚀性能. 结果表明: 采用浆料刷涂工艺涂覆, 在高纯氩气保护气氛下, 经1350℃高温烧结, 可在C_f/SiC试样上制得致密且无明显缺陷的BSAS涂层, 一次涂覆烧结的厚度约为15μm, 三次涂覆烧结涂层的厚度可达50μm; 在1250℃、50%H₂O-50%O₂、常压静态气氛下腐蚀100h后, C_f/SiC试样的重量和抗弯强度均发生明显下降, C_f/SiC-BSAS试样的重量基本不变, 强度保持率高达90%以上.

关键词: 环境障碍涂层, 浆料, BSAS, 水腐蚀性能

Abstract: Ba_0.25Sr_0.75Al₂Si₂O₈ (BSAS) as environmental barrier coating (EBC) was coated on the 2D C_f/SiC substrate using slurry-brushing process. The water-vapor corrosion resistance of C_f/SiC and C_f/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 C_f/SiC-SiC decreases greatly, while the weight of C_f/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

中图分类号:

TB323

鲁琳静, 成来飞, 洪智亮, 王一光, 张立同. Ba_0.25Sr_0.75Al₂Si₂O₈环境障碍涂层的制备与耐水腐蚀性能研究[J]. 无机材料学报, 2011, 26(7): 701-706.

LU Lin-Jing, CHENG Lai-Fei, HONG Zhi-Liang, WANG Yi-Guang, ZHANG Li-Tong. Fabrication and Water-vapor Corrosion Resistance of Ba_0.25Sr_0.75Al₂Si₂O₈ Environmental Barrier Coating[J]. Journal of Inorganic Materials, 2011, 26(7): 701-706.

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Ba_0.25Sr_0.75Al₂Si₂O₈环境障碍涂层的制备与耐水腐蚀性能研究

Fabrication and Water-vapor Corrosion Resistance of Ba_0.25Sr_0.75Al₂Si₂O₈ Environmental Barrier Coating

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