文献类型：期刊文献

英文题名：Investigation of sintering mechanism for novel composite structural thermal barrier coating

作者：Yang, Ting[1];Wang, Weize[1,4];Huang, Jibo[2];Liu, Yangguang[1];Li, Kaibin[1];Yang, Zining[1];Wang, Yihao[1];Yuan, Baohan[1];Zhang, Chengcheng[3]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai, Peoples R China;[2]South China Univ Technol, Sch Mat Sci & Engn, Guangzhou, Peoples R China;[3]AECC Commercial Aircraft Engine Co Ltd, Shanghai, Peoples R China;[4]East China Univ Sci & Technol, Sch Mech & Power Engn, Minist Educ, Key Lab Safety Sci Pressurized Syst, Shanghai 200237, Peoples R China

年份：2023

卷号：106

期号：9

起止页码：5541

外文期刊名：JOURNAL OF THE AMERICAN CERAMIC SOCIETY

收录：;EI(收录号：20232014081883);WOS:【SCI-EXPANDED(收录号:WOS:000985016300001)】；

基金：National Natural Science Foundation of China, Grant/Award Numbers: 52175136, 52130511; Science Center for Gas Turbine Project, Grant/Award Number: P2021-A-IV-002-002; Shanghai Joint Innovation Program in the Field of Commercial Aviation Engines; The National High Technology Research and Development Program of China, Grant/Award Number: 2021YFB3702200

语种：英文

外文关键词：electron backscatter diffraction; sintering mechanism; structure design; thermal barrier coating

摘要：A micro-agglomerated particle embedded-thermal barrier coating (TBC) structure was prepared by an improved plasma spray process to withstand the sintering-induced degradation of TBCs during service. In this study, the sintering resistance and thermophysical and mechanical properties of conventional and novel-structured TBCs were systematically characterized. The results suggested that the thermal conductivity and sintering shrinkage of the novel-structured TBCs were approximately 30% lower than those of conventional air plasma spraying TBCs. The elastic modulus of the novel-structured coating is only 32% of that of the conventional structure after thermal exposure at 1300 degrees C for 100 h. The distinct structure of the coating is the main factor that influences its performance. The relationship between the structural evolution and residual strain of the coating was analyzed using electron backscatter diffraction and transmission electron microscopy. Significant differences were observed in the sintering behavior of the dense matrix and embedded particle regions in the coating. Some columnar grains near the intersplat pores in the dense matrix have similar lattice orientations, and they tend to connect and consequently heal the intersplat pores. The large pores between the agglomerated particles and non-oriented submicron-sized grains that constitute these particles are responsible for the sintering resistance of the coating.