Pressure infiltration of molten aluminum for densification of environmental barrier coatings

作     者：Lin DONG Mei-Jun LIU Xiao-Feng ZHANG Xue-Shi ZHUO Jia-Feng FAN Guan-Jun YANG Ke-Song ZHOU Lin DONG;Mei-Jun LIU;Xiao-Feng ZHANG;Xue-Shi ZHUO;Jia-Feng FAN;Guan-Jun YANG;Ke-Song ZHOU

作者机构：State Key Laboratory for Mechanical Behavior ofMaterialsSchool ofMaterials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China National Engineering Laboratory for Modern Materials Surface Engineering TechnologyInstitute of New MaterialsGuangdong Academy of ScienceGuangzhou 510650China 

出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)

年 卷 期：2022年第11卷第1期

页      面：145-157页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the National Natural Science Foundation of China(No.51901175) the Guangdong Province Outstanding Youth Foundation(No.2021B1515020038) the Guangzhou Technical Research Program(No.201906010015) the Industry University Research Project funded by Aero Engine Corporation of China(No.HFZL2019CXY015) the Postdoctoral Research Foundation of China(Nos.2020T130499 and 2019M653602) the National Program for Support of Top-notch Young Professionals 

主　　题：infiltration process channel pore densification pressure assistant environmental barrier coating(EBC) 

摘      要：Environmental barrier coatings(EBCs)effectively protect the ceramic matrix composites(CMCs)from harsh engine environments,especially steam and molten ***,open pores inevitably formed during the deposition process provide the transport channels for oxidants and corrosives,and lead to premature failure of *** research work proposed a method of pressure infiltration densification which blocked these open pores in the *** results showed that it was difficult for aluminum to infiltrate spontaneously,but with the increase of external gas pressure and internal vacuum simultaneously,the molten aluminum obviously moved forward,and finally stopped infiltrating at a depth of a specific *** on the wrinkled zigzag pore model,a mathematical relationship between the critical pressure with the infiltration depth and the pore intrinsic geometry was *** infiltration results confirmed this relationship,indicating that for a given coating,a dense thick film can be obtained by adjusting the internal and external gas pressures to drive a melt infiltration.