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.

References

References
1.
Burley
,
N. A.
,
1969
, “
Solute Depletion and Thermo-E.M.F. Drift in Nickel-Base Thermocouple Alloys
,”
J. Inst. Metals
,
97
, pp.
252
254
.
2.
ASTM,
1993
, Manual on the Use of Thermocouple in Temperature Measurement,
American Society for Testing and Materials
, West Conshohochken, PA, pp. 20–61.
3.
Birks
,
N.
,
Meier
,
G. H.
, and
Pettit
,
F. S.
,
2006
,
Introduction to the High-Temperature Oxidation of Metals
,
Cambridge University Press
,
Cambridge, UK
, Chap. 5.
4.
Giggins
,
C. S.
, and
Pettit
,
F. S.
,
1969
, “
Oxidation of Ni-Cr Alloys Between 800 °C and 1200 °C
,”
Trans. Metall. Soc. AIME
,
245
, pp.
2495
2507
.
5.
Gatward
,
W. A.
,
1935
, “
Chromel & Alumel: Alloys for Thermocouples
,”
Met. Prog.
,
27
, pp.
31
35
.
6.
Wang
,
T. P.
,
Starr
,
C. D.
, and
Brown
,
N.
,
1966
, “
Thermoelectric Characteristics of Binary Alloys of Nickel
,”
Acta Metall.
,
14
(
5
), pp.
649
657
.
7.
Burley
,
N. A.
,
1972
, “
High Stable Nickel-Base Alloys for Thermocouples
,”
J. Aust. Inst. Met.
,
17
, pp.
101
113
.
8.
Anderson
,
R. L.
,
Lyons
,
J. D.
,
Kollie
,
T. G.
,
Christie
,
W. H.
, and
Eby
,
R.
,
1982
, “
Decalibration of Sheathed Thermocouples
,”
Temperature: Its Measurement and Control in Science and Industry
, Vol.
5
, American Institute of Physics, Melville, NY, pp.
977
1007
.
9.
Scervini
,
M.
, and
Rae
,
C.
,
2013
, “
The Contributions to Drift of Positive and Negative Thermoelements in Type K MIMS Thermocouples
,”
Temperature: Its Measurement and Control in Science and Industry, Ninth International Temperature Symposium, Los Angeles, CA, Mar. 19–23
, Vol. 1552, pp.
570
575
.
10.
Scervini
,
M.
, and
Rae
,
C.
,
2013
, “
An Improved Nickel Based MIMS Thermocouple for High Temperature Gas Turbine Applications
,”
ASME J. Eng. Gas Turbines Power
,
135
(
9
), p.
091601
.
11.
Scervini
,
M.
, and
Rae
,
C.
,
2011
, “
Thermocouple Apparatus and Method
,” Patent application publication No. WO2011121313 A1.
You do not currently have access to this content.