Construction of a Cr3C2-C Peritectic Point Cell  for Thermocouple Calibration

Ogura, H.; Deuzé, T.; Morice, R.; Ridoux, P.; Filtz, Jean-Rémy

doi:10.9746/jcmsi.3.81

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…Recently, several eutectic and peritectic points, such as Pt-C (1738 • C), Cr 7 C 3 -Cr 3 C 2 (1742 • C), and Ru-C (1953 • C) eutectic points and Cr 3 C 2 -C (1826 • C) peritectic point, evaluated using W-Re thermocouples were reported [5][6][7]. This means that these points are not only applicable for measurements of the stability of W-Re thermocouples but also to realize precise evaluation, since they remove problems caused by large drifts of reference thermometers during the measurement of stability.…”

Section: Introductionmentioning

confidence: 99%

Stability of Tungsten–Rhenium Thermocouples in the Range from 0 °C to 1500 °C

2011

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The effect of exposure up to 1500 • C on emf values of type C (95 % tungsten 5 % rhenium vs. 74 % tungsten 26 % rhenium) thermocouples were evaluated. Three thermocouples consisting of thermocouple wires of 0.5 mm diameter, twin-bore beryllia tubes, and tantalum sheaths were prepared. After three type C thermocouples were calibrated in the range from 0 • C to 1550 • C, which confirmed insignificant difference among them, the drifts of two among them were measured at the palladium-carbon (Pd-C) eutectic point (1492 • C). They indicated a similar tendency, where the emf of thermocouples increased rapidly within the first 30 h, and after that, decreased gradually. To investigate the mechanism of the drift, the inhomogeneities of thermocouples were examined at 160 • C using a water heat-pipe furnace during the drift measurements at the Pd-C eutectic point. It was found that the increase of emf within the first 30 h exposure at around 1500 • C was caused by the emf change due to inhomogeneity above 700 • C, and after that, the decrease of emf was caused by that around 1400 • C.

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Section: Introductionmentioning

confidence: 99%

Stability of Tungsten–Rhenium Thermocouples in the Range from 0 °C to 1500 °C

2011

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“…Qu'ils soient dédiés à la thermométrie de contact ou à la pyrométrie optique, les PFHT réalisés à partir des transitions eutectiques sont élaborés, pour les points [6]. Les mélanges de métal et de carbone, obtenus à partir de poudre ou de feuilles de carbone (appelées feuilles C/C), ont été préalablement préparés puis versés (ou placés) dans les creusets.…”

Section: éTude Expérimentale Du Choix Des Matériaux Et Des Méthodes Dunclassified

“…Cette méthode garantit une bonne homogénéité du lingot. Sa masse est de 99,6 g pour un volume de 15,4 cm 3 , soit une masse volumique de 6,5 g/cm 3 , qui confirme celle estimée à partir des échantillons [6].…”

Section: Procédure De Remplissage De La Cellule Thermométriqueunclassified

Étude des points fixes de température du Cr-C aux transitions eutectique et péritectique

BOURSON¹,

SADLI²,

DEUZÉ³

et al. 2015

R. franç. métrol.

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“…Above 1000 °C, LNE-Cnam have a series of high temperature fixed-points (HTFPs) up to a temperature of 1500 °C suitable for thermocouple calibration, as well as a number of HTFPs up to a temperature of 1953 °C which are used for radiation thermometry but can be adapted for thermocouple calibration [19,[33][34][35][36][37][38]. However, due to technical problems with the furnace used for realizing these fixed points, the LNE-Cnam measurements in this article were restricted to the wire bridge calibrations using Pd and Pt points, and the freezing point of silver using a conventional tube furnace.…”

Section: Lne-cnam Facilitiesmentioning

confidence: 99%

A pan-European investigation of the Pt-40%Rh/Pt-20%Rh (Land–Jewell) thermocouple reference function

Pearce¹,

Elliott²,

Greenen³

et al. 2014

Meas. Sci. Technol.

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Accurate high temperature measurement has always been problematic for industry. The vast majority of industrial temperature measurements are performed with thermocouples. The development of any new thermocouple types requires the characterization of the relationship between thermocouple output and temperature, i.e. the reference function. An important thermocouple for measuring temperatures above about 1500 °C is the so-called Land–Jewell (Pt-40%Rh/Pt-20%Rh) thermocouple. This was used as a test thermocouple for a new European distributed facility for characterizing thermocouple reference function. The facility is described, and used to generate a demonstrator reference function for the thermocouple. It is found that the demonstrator reference function differs from the de-facto standard reference function of ASTM E1750-09 by several degrees above 1500 °C; a suggested explanation for this is given.

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Construction of a Cr3C2-C Peritectic Point Cell for Thermocouple Calibration

Cited by 7 publications

References 2 publications

Stability of Tungsten–Rhenium Thermocouples in the Range from 0 °C to 1500 °C

Stability of Tungsten–Rhenium Thermocouples in the Range from 0 °C to 1500 °C

Étude des points fixes de température du Cr-C aux transitions eutectique et péritectique

A pan-European investigation of the Pt-40%Rh/Pt-20%Rh (Land–Jewell) thermocouple reference function

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