Conclusions
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1.
Quantitative characteristics were obtained in this work at high temperatures for the condensed nickel's oxidation and its diffusion into its backing made of the heat-resisting alloy ÉI868.
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2.
The data thus obtained serve to evaluate the condensed-nickel electrode is minimum thickness required to ensure the operation of the thin-film “nickel and ÉI868 alloy” thermocouple during a given time.
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3.
For a nickel electrode thickness of 30μ the thermocouple can operate at t=1000°C for ∼5 h.
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Literature cited
D. F. Simbirskii, A. F. Bogdanova, L. S. Grigor'ev, and B. I. Kolesnik, Izmeritel'. Tekh., No. 1 (1970).
O. Kubaszewski and B. Hopkins, Oxidation of Metals and Alloys [Russian translation], Metallurgiya, Moscow (1965).
J. Benard (editor), Oxidation of Metals [Russian translation], Vol. 2, Metallurgiya, Moscow (1969).
Additional information
Translated from Izmeritel'naya Tekhnika, No. 7, pp. 31–33, July, 1971.
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Palatnik, L.S., Bogdanova, A.F., Grigor'ev, L.S. et al. High-temperature stable thin-film thermocouples. Meas Tech 14, 1025–1027 (1971). https://doi.org/10.1007/BF00983033
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DOI: https://doi.org/10.1007/BF00983033