Study on water corrosion behavior of ZrSiO_4 materials  

作　　者：Ling LIU Wei ZHENG Zhuang MA Yanbo LIU 

机构地区：[1]School of Materials Science and Engineering, Beijing Institute of Technology [2]National Key Laboratory of Science and Technology on Materials under Shock and Impact

出　　处：《Journal of Advanced Ceramics》2018年第4期336-342,共7页先进陶瓷（英文）

基　　金：supported by the National Natural Science Foundation of China under Grant No.51772027

摘　　要：ZrSiO_4 bulk was prepared by pressureless sintering process and ZrSiO_4 coating was deposited on the SiC f/Si C substrate using air plasma method. The microstructures of ZrSiO_4 bulk and ZrSiO_4 coating are both dense. A preliminary study of a water vapor corrosion test for ZrSiO_4 bulk and ZrSiO_4 coating was performed under the conditions of 1.013×105 Pa, 90%H_2O/10%O_2, 1300 ℃, and low gas velocity. Results show that some pores appear on the surface of the ZrSiO_4 bulk. The main crystal phase is ZrO_2 and the weight loss of ZrSiO_4 bulk is only 0.236 mg/cm^2 after corrosion. The ZrSiO_4 coating peels off from the substrate after 109 h. The number and intensity of diffraction peaks of ZrO_2 in the coating increase, and the major crystal phase of the coating is still ZrSiO_4. A porous microstructure accompanied with cracks is observed on the surface of ZrSiO_4 coating after corrosion.ZrSiO_4 bulk was prepared by pressureless sintering process and ZrSiO_4 coating was deposited on the SiC f/Si C substrate using air plasma method. The microstructures of ZrSiO_4 bulk and ZrSiO_4 coating are both dense. A preliminary study of a water vapor corrosion test for ZrSiO_4 bulk and ZrSiO_4 coating was performed under the conditions of 1.013×105 Pa, 90%H_2O/10%O_2, 1300 ℃, and low gas velocity. Results show that some pores appear on the surface of the ZrSiO_4 bulk. The main crystal phase is ZrO_2 and the weight loss of ZrSiO_4 bulk is only 0.236 mg/cm^2 after corrosion. The ZrSiO_4 coating peels off from the substrate after 109 h. The number and intensity of diffraction peaks of ZrO_2 in the coating increase, and the major crystal phase of the coating is still ZrSiO_4. A porous microstructure accompanied with cracks is observed on the surface of ZrSiO_4 coating after corrosion.

关 键 词：ZRSIO4 SICF/SIC SUBSTRATE environmental BARRIER coating (EBC) water vapor corrosion BEHAVIOR 

分 类 号：TQ[化学工程]