文献类型：期刊文献

英文题名：Thermal Shock Resistance and Bonding Strength of Novel-Structured Thermal Barrier Coatings with Different Microstructure

作者：Yang, Ting[1];Wang, Weize[1];Huang, Jibo[2];Wang, Lubin[3];Yang, Zining[1];Fang, Huangjie[1];Ye, Dongdong[1,4]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Guangdong Acad Sci, Inst New Mat, Natl Engn Lab Modern Mat Surface Engn Technol, Guangzhou 510650, Peoples R China;[3]Ningbo Huaxiang Automot Technol Co Ltd, Ningbo 315033, Zhejiang, Peoples R China;[4]Anhui Polytech Univ, Sch Mech Engn, Wuhu 241000, Peoples R China

年份：2022

卷号：31

期号：5

起止页码：1540

外文期刊名：JOURNAL OF THERMAL SPRAY TECHNOLOGY

收录：;EI(收录号：20221411906738);WOS:【SCI-EXPANDED(收录号:WOS:000775740500004)】；

基金：This research is sponsored by the National Natural Science Foundation of China (Grant No. 51775189), Shanghai Aerospace Science and Technology Innovation Fund (SAST2019056) and Shanghai Commercial Aero Engine Joint Innovation Program.

语种：英文

外文关键词：bond strength; embedded particles content; structure regulation; thermal barrier coating; thermal shock test

摘要：Structural tailoring is an effective method for improving the performance of thermal barrier coatings. In this study, embedded micro-agglomerated particle (EMAP) coatings were fabricated using a non-conventional air plasma spray method. The effects of microstructure of EMAP coating on the bond strength and thermal shock lifetime were investigated in detail. A finite element model was also proposed to evaluate the stress distribution of the EMAP coatings. Results show that the EMAP coatings exhibited composite structure, in which micro-agglomerated particles are embedded in the coating matrix. Both the total porosity and thermal shock lifetime of the coatings decreased with the decrease in plasma gun speed from 500 to 150 mm/s. Meanwhile, with the increase in feed rate of 'Powder 2,' the embedded particles in the coating become noticeable. The thermal shock lifetime and bond strength of the coating deposited by highest 'Powder 2' feed rate were approximately 124 cycles and 21.5 MPa. A finite element model implies the thermal stress concentration of the coatings gradually decreased with an increase in the embedded particle area, and the propagation of cracks consumed more energy. Using this novel coating deposition method, the microstructure in EMAP coatings can be conveniently adjusted to obtain the designed coating performance.