Thermal oxidation reliability and structure optimization of thin film thermocouple

被引：0
|
作者：
Wang Y. [1 ]
Sun Y. [1 ]
Lei D. [1 ]
Xue Y. [1 ]
机构：
[1] School of Reliability and Systems Engineering, Beihang University, Beijing
来源：
Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics | 2023年 / 49卷 / 04期
关键词：
interface diffusion; optimization simulation; particle swarm optimization; reliability; thin film thermocouple;
D O I：
10.13700/j.bh.1001-5965.2021.0318
中图分类号：
学科分类号：
摘要：
The part of an aero engine with the highest temperature is the turbine blade. The film material is prepared on the surface of the object to be measured to form a thermocouple sensor, which can timely and effectively measure the temperature of the turbine blade. The diffusion failure of the thermal oxidation interface between multilayer films of thin film thermocoupleis one of the main reasons for the low reliability of thin film thermocouples. One of the main causes of the low reliability of thin film thermocouples is the diffusion failure of the thermal oxidation interface between multilayer layers. Based on Fick's second law, this paper proposes a diffusion reliability model of multilayer film to quantitatively describe the diffusion failure mechanism of thin film thermocouples. Through simulation calculation and particle swarm optimization, the optimal structure of each layer is obtained with the goal of maximizing the lifetime of thin-film, It provides a certain method reference for improving the lifetime of thin film thermocouple in structure and technology. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：943 / 948
页数：5
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