Analysis of infrared emissivity of EB-PVD thermal barrier coatings at the microscopic level

Ying Cui; Yuhui Liu; Shan Gao; Liwei Chen; Jing Jiang; Yi Niu; Chao Wang

Case Studies in Thermal Engineering (Aug 2024)

Analysis of infrared emissivity of EB-PVD thermal barrier coatings at the microscopic level

Ying Cui,
Yuhui Liu,
Shan Gao,
Liwei Chen,
Jing Jiang,
Yi Niu,
Chao Wang

Affiliations

Ying Cui: Key Laboratory of Advanced Marine Communication and Information Technology, Ministry of Industry and Information Technology, College of Information and Communication Engineering, Harbin Engineering University, 150001, Harbin, China
Yuhui Liu: Key Laboratory of Advanced Marine Communication and Information Technology, Ministry of Industry and Information Technology, College of Information and Communication Engineering, Harbin Engineering University, 150001, Harbin, China
Shan Gao: Key Laboratory of Advanced Marine Communication and Information Technology, Ministry of Industry and Information Technology, College of Information and Communication Engineering, Harbin Engineering University, 150001, Harbin, China; Corresponding author.
Liwei Chen: Key Laboratory of Advanced Marine Communication and Information Technology, Ministry of Industry and Information Technology, College of Information and Communication Engineering, Harbin Engineering University, 150001, Harbin, China
Jing Jiang: Clean Energy Materials and Engineering Center, School of Electronic Science and Engineering, State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, 611731, Chengdu, China
Yi Niu: Clean Energy Materials and Engineering Center, School of Electronic Science and Engineering, State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, 611731, Chengdu, China
Chao Wang: State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, 100084, Beijing, China

Journal volume & issue: Vol. 60
p. 104609

Abstract

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Thermal barrier coatings (TBCs) applications of yttria-stabilized (YSZ) are widely utilized on turbine blades of aviation engines due to its low thermal conductivity and high electrical conductivity. Predicting the infrared emissivity aids in monitoring blade operating temperatures, ensuring safe engine operation. This paper innovatively introduces a novel three-dimensional columnar EB-PVD coating model and utilizes the FDTD method to predict emissivity. The model exhibits strong consistency with experimental results for predicted emissivity in the short-wave infrared band (1.4–3 μm). The unique microstructure of the EB-PVD thermal barrier coatings significantly influence the infrared emissivity. The results indicate that vertically uniform arranged feathers exhibit higher emissivity levels compared to feathers with varying densities. Additionally, increasing the thickness of the ceramic top coating and reducing spherical closed porosity also enhance the emissivity levels. This research provides guidance for controlling emissivity at the microscale in the preparation of thermal barrier coatings.

Published in Case Studies in Thermal Engineering

ISSN: 2214-157X (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: http://www.journals.elsevier.com/case-studies-in-thermal-engineering/

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