YANG Ke, JIANG Hong-chuan, ZHAO Xiao-hui. Research and fabrication of thin-film thermocouples for aeroengine[J]. 2019, (4): 82-85. DOI: 10.13873/J.1000-9787(2019)04-0082-04.
航空发动机用薄膜热电偶研制
摘要
针对航空发动机涡轮叶片表面温度测试的迫切需求
采用薄膜沉积工艺
能够在Ni基高温合金表面制备热电性能较好的中温K型(NiCr/NiSi
<
600℃)、高温R型(Pt—13%Rh/Pt
<
900℃)、超高温(ITON/Pt
<
1 100℃; In ON/ITON
> 1 200℃)等薄膜热电偶。薄膜热电偶由NiCr Al Y过渡层、热生长Al
2
O
3
层、Al
2
O
3
绝缘层、功能层和Al
2
O
3
保护层构成。通过静态标定结果分析
其塞贝克系数分别达到38. 26
10. 60
78. 60
123. 10μV/℃
在恶劣环境下具有良好的稳定性和一致性
使用寿命均大于10 h。
Abstract
Aiming at the urgent need for surface temperature test of aeroengine turbine blade
K-type( NiCr/NiSi
<
600 ℃)
R-type( Pt-13 % Rh/Pt
<
900 ℃)
ITON/Pt(
<
1 100 ℃) and ION/ITON( > 1 200 ℃) thin film thermocouples with improved thermoelectric properties on the surface of Ni-based alloy by thin films deposition technology are fabricated. Thin film thermocouples are composed of NiCrAlY buffer layer
thermal grown Al
2
O
3
layer
Al
2
O
3
insulating layer
functional layer and Al
2
O
3
protecting layer. Analysis on results of static calibration show that the Seebeck coefficients are 38. 26
10. 60
78. 60
and 123. 10 μV/℃
respectively. These thin film thermocouples also have good stability and consistency in the harsh environment
and the service life of thin film thermocouples is longer than 10 h.