Recent progress on the new nickel-based thermocouples for high-temperature applications developed at the Department of Materials Science and Metallurgy in the University of Cambridge is described in this paper. Isothermal drift at temperatures above 1000 °C as a function of the thermocouple diameter has been studied for both conventional nickel-based thermocouples and the new nickel-based thermocouple. The new nickel-based thermocouple experiences a much reduced drift compared to conventional sensors. Tests in thermal cyclic conditions have been undertaken on conventional and new nickel-based thermocouples, showing a clear improvement for the new sensors at temperatures both higher and lower than 1000 °C. The improvements achievable with the new nickel-based thermocouple in both isothermal and thermal cycling conditions suggest that the new sensor can be used at high temperatures, where current conventional sensors are not reliable, as well as at temperatures lower than 1000 °C with improved performance compared to the conventional sensors.
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August 2016
Research-Article
Development of Low-Drift Nickel-Based Thermocouples for High-Temperature Applications
Michele Scervini
Michele Scervini
Mem. ASME
Department of Materials Science and Metallurgy,
University of Cambridge,
27 Charles Babbage Road,
Cambridge CB3 0FS, UK
e-mail: ms737@cam.ac.uk
Department of Materials Science and Metallurgy,
University of Cambridge,
27 Charles Babbage Road,
Cambridge CB3 0FS, UK
e-mail: ms737@cam.ac.uk
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Michele Scervini
Mem. ASME
Department of Materials Science and Metallurgy,
University of Cambridge,
27 Charles Babbage Road,
Cambridge CB3 0FS, UK
e-mail: ms737@cam.ac.uk
Department of Materials Science and Metallurgy,
University of Cambridge,
27 Charles Babbage Road,
Cambridge CB3 0FS, UK
e-mail: ms737@cam.ac.uk
1Corresponding author.
Contributed by the Controls, Diagnostics and Instrumentation Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received November 20, 2015; final manuscript received December 29, 2015; published online March 15, 2016. Editor: David Wisler.
J. Eng. Gas Turbines Power. Aug 2016, 138(8): 081601 (8 pages)
Published Online: March 15, 2016
Article history
Received:
November 20, 2015
Revised:
December 29, 2015
Citation
Scervini, M. (March 15, 2016). "Development of Low-Drift Nickel-Based Thermocouples for High-Temperature Applications." ASME. J. Eng. Gas Turbines Power. August 2016; 138(8): 081601. https://doi.org/10.1115/1.4032646
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