Metal-based sandwich type thick-film platinum resistance temperature detector for in-situ temperature monitoring of hot-end components

• Published in: Applied surface science Vol. 637; p. 157979
• Main Authors: Zeng, Yingjun, Chen, Guochun, Zhao, Fuxin, Wu, Chao, Xu, Lida, Zhang, Yansong, Wu, Wenjie, Lin, Yuxin, He, Gonghan, Chen, Qinnan, Zhao, Yang, Tang, Rui, Sun, Daoheng, Hai, Zhenyin
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-11-2023
• Subjects: Direct ink writing; Insulating layer; Platinum; Resistance temperature detector; Turbine blade thermometry; Insulating layer; Direct ink writing; Turbine blade thermometry; Resistance temperature detector; Platinum
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2023.157979

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•A Pt RTD was fabricated on turbine blades using DIW technology for the first time.•The sandwich structure enables the Pt RTD to exhibit high-temperature stability performance comparable to armored thermocouples.•The performance and preparation methods of the Pt RTD demonstrate promising potential for real-world applications.
High-temperature resistance temperature detectors (RTDs) are gaining significant attention for various promising applications, including aeroengines, steel metallurgy, and construction machinery. However, it remains a critical challenge in developing RTDs on curved metal substrates without involving high-cost and complicated manufacturing processes. Herein, a metal-based sandwich type thick-film platinum (Pt) RTD for in-situ temperature monitoring of hot-end components is developed through a facile and high-efficient tape mask process and direct ink writing (DIW) technology. The liquid-formed glass–ceramic insulating layer and protective layer effectively immobilize the Pt particles within a sandwich structure, resulting in adequate protection from volatilization and aggregation of the Pt sensitive layer. Meanwhile, the insulating/protective layer exhibits outstanding insulation performance. Additionally, the fabricated Pt RTD achieved excellent repeatability, ultra-high stability (with a temperature drift rate of 0.7%/h at 800 °C), and high accuracy (0.92% full-scale) in the range of 50–800 °C. As an application example, the Pt RTD was fabricated on the surface of a turbine blade to verify its functionality at temperatures up to 800 °C. The exceptional performance and flexible fabrication process indicate that the Pt RTD is a promising candidate for in-situ temperature monitoring of critical aeroengine components.