Conformal Fabrication of Thick Film Platinum Strain Gauge Via Error Regulation Strategies for In Situ High-Temperature Strain Detection

Guochun Chen; Fuxin Zhao; Yingjun Zeng; Zhixuan Su; Lida Xu; Chenhe Shao; Chao Wu; Gonghan He; Qinnan Chen; Yang Zhao; Daoheng Sun; Zhenyin Hai

doi:10.1021/acsami.3c10866

Conformal Fabrication of Thick Film Platinum Strain Gauge Via Error Regulation Strategies for In Situ High-Temperature Strain Detection

ACS Appl Mater Interfaces. 2024 Jan 10;16(1):966-974. doi: 10.1021/acsami.3c10866. Epub 2023 Dec 18.

Authors

Guochun Chen^{1

2}, Fuxin Zhao^{1

2}, Yingjun Zeng^{1

2}, Zhixuan Su³, Lida Xu^{1

2}, Chenhe Shao^{1

2}, Chao Wu^{1

2}, Gonghan He^{1

2}, Qinnan Chen^{1

2}, Yang Zhao^{1

2}, Daoheng Sun^{1

2}, Zhenyin Hai^{2

3}

Affiliations

¹ Pen-Tung Sah Institute of Micro-Nano Science & Technology, Xiamen University, Xiamen 361005, P. R. China.
² Fujian Micro/Nano Manufacturing Engineering Technology Research Center, Xiamen University, Xiamen 361102, P. R. China.
³ Department of Mechanical & Electrical Engineering, Xiamen University, Xiamen 361005, P. R. China.

PMID: 38109359
DOI: 10.1021/acsami.3c10866

Abstract

Monitoring high-temperature strain on curved components in harsh environments is a challenge for a wide range of applications, including in aircraft engines, gas turbines, and hypersonic vehicles. Although there are significant improvements in the preparation of high-temperature piezoresistive film on planar surfaces using 3D printing methods, there are still difficulties with poor surface compatibility and high-temperature strain testing on curved surfaces. Herein, a conformal direct ink writing (CDIW) system coupled with an error feedback regulation strategy was used to fabricate high-precision, thick films on curved surfaces. This strategy enabled the maximum amount of error in the distance between the needle and the substrate on a curved surface to be regulated from 155 to 4 μm. A conformal Pt thick-film strain gauge (CPTFSG) with a room-temperature strain coefficient of 1.7 was created on a curved metallic substrate for the first time. The resistance drift rate at 800 °C for 1 h was 1.1%, which demonstrated the excellent stability and oxidation resistance of the CPTFSG. High-temperature dynamic strain tests up to 769 °C revealed that the sensor had excellent high-temperature strain test performance. Furthermore, the CPTFSG was conformally deposited on an aero-engine turbine blade to perform in situ tensile and compressive strain testing at room temperature. High-temperature strain tests were conducted at 100 and 200 °C for 600 and 580 με, respectively, demonstrating a high steady-state response consistent with the commercial high-temperature strain transducer. In addition, steady-state strain tests at high temperatures up to 496 °C were tested. The CDIW error modulation strategy provides a highly promising approach for the high-precision fabrication of Pt thick films on complex surfaces and driving in situ sensing of high-temperature parameters on curved components toward practical applications.

Keywords: conformal fabrication; error feedback regulation; high-temperature; strain sensor; thick film; turbine blade.