Engineering design of feedstock powder and relevant thermal-mechanical performance of thermal/environmental barrier coatings

作     者：Xinchang Feng Fangwei Guo Lirong Luo Yuzhang Wang Yun Long Xiaofeng Zhao Fei Pan Lei Guo Qingfeng Zeng Jing Feng Chunlei Wan 

作者机构：Shanghai Key Laboratory of Advanced High-temperature Materials and Precision FormingSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China National Engineering Research Center of Special Equipment and Power System for Ship and Marine EngineeringShanghai 200030China School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Advanced Nuclear Energy TechnologyNuclear Power Institute of ChinaChengdu 610213China Innovative Sensor Technology IST AGEbnat-Kappel 9642Switzerland School of Materials Science and EngineeringTianjin UniversityTianjin 300072China Tianmushan LaboratoryHangzhou 311115China School of Materials Science and EngineeringKunming University of Science and TechnologyKunming 650093China State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084China 

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

年 卷 期：2025年第14卷第2期

页      面：37-56页

核心收录：

学科分类：080503[工学-材料加工工程] 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 Shanghai Pujiang Program(No.2022PJD033) the Oceanic Interdisciplinary Program of Shanghai Jiao Tong University(No.SL2022MS013) the Key R&D Program of Zhejiang(No.2024SSYS0085) 

主　　题：thermal/environmental barrier coatings(TBCs/EBCs) spraying ceramic powder multiscale structure control high-entropy ceramics thermal-mechanical performance 

摘      要：The development of aeroengine with a high thrust-weight ratio poses great challenges for current top-coating thermal barrier coatings (TBCs) and environmental barrier coatings (EBCs) in service. Medium/high-entropy ceramics are highly promising candidate material for advanced TBCs/EBCs owing to their low thermal conductivity, high melting point, high-temperature stability, and calcium–magnesium–alumino–silicate (CMAS) resistance. Most feedstock powder used for medium/high-entropy TBCs/EBCs is prepared via traditional spray drying, which cannot fully exploit the advantages of multicomponent ceramics. The density, sphericity, inner structure, and flowability of feedstock powder affect their melting state during the thermal spraying process, which strongly affects the microstructure and properties of the deposited coatings. Therefore, the deposited coatings exhibit phase segregation, amorphous phases, and microstructure defects owing to unpredictable variations in feedstock powder with random morphologies and structures. Here, the structure and properties of feedstock powder prepared by state-of-the-art granulation technologies and their influences on the deposited coatings were systematically investigated, which can provide guidance for configuration optimization of feedstock powder and the manufacturing accuracy of the deposited coating. This review aims to bridge the gap between cutting-edge ceramics and advanced engineering technologies, thus providing concrete background knowledge and crucial guidelines for designing and developing TBCs/EBCs.