The equilibrium liquidus temperatures of rhenium–carbon, platinum–carbon and cobalt–carbon eutectic alloys

Lowe, D.; Todd, A. D. W.; Bossche, Rafael Van den; Bloembergen, P.; Anhalt, K.; Ballico, Mark; Bourson, F.; Briaudeau, S.; Campos, Jesús; Cox, M G; Campo, D. del; Dury, M. R.; Gavrilov, V. R.; Grigoryeva, Irina; Hernanz, María Luisa; Jahan, F.; Khlevnoy, B. B.; Khromchenko, Vladimir B.; Lu, X.; Machin, G.; Mantilla, J. M.; Martín, M. J.; McEvoy, H C; Rougié, B.; Sadli, M.; Salim, S. G. R.; Sasajima, N.; Taubert, D. R.; Ham, Eric; Wang, T; Wei, Dong; Whittam, Aaron; Wilthan, Boris; Woods, D.; Woodward, John T.; Woolliams, Emma; Yamada, Yoshiro; Yamaguchi, Yu; Yoon, Howard W.; Yuan, Z.

doi:10.1088/1681-7575/aa6eeb

Cited by 26 publications

(24 citation statements)

References 16 publications

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“…This approach is expected to have competitive uncertainties compared to ITS-90 above 1300 K and will facilitate direct linkage to the kelvin definition. This work builds on earlier work where low uncertainty values for the HTFPs of Co-C (~1597 K), Pt-C (~2011 K) and re-C (~2747 K) were determined [34,36,37].…”

Section: Realisation and Dissemination Of The Kelvin Above 1300 Kmentioning

confidence: 66%

Towards Realising the Redefined Kelvin

Machin¹,

Sadli²,

Pearce³

et al. 2022

SSRN Journal

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Section: Realisation and Dissemination Of The Kelvin Above 1300 Kmentioning

confidence: 66%

Towards Realising the Redefined Kelvin

Machin¹,

Sadli²,

Pearce³

et al. 2022

SSRN Journal

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“…Additionally, the components and uncertainties herein are based upon the most studied HTFP cells, namely Co-C, Pt-C and Re-C. To compile this list of uncertainties and their values we relied heavily on work done in establishing definitive melting temperatures as part of the CCT WG-NCTh/InK project, which is summarised in [4], [7], [8], [9].…”

Section: Methodsmentioning

confidence: 99%

“…The uncertainty in the liquidus temperature should be taken as the difference between the upper-limit and point-of-inflection temperatures divided by 2 √ 3. In [8], this amounted to, on average, 0.024 K, 0.044 K and 0.069 K for Co-C, Pt-C and Re-C, respectively, although values can be calculated for each individual plateau. These values are taken to be both the best and normal uncertainties.…”

Section: Identification Of the Point-of-inflection And The Liquidus P...mentioning

confidence: 99%

On the uncertainties in the realization of the kelvin based on thermodynamic temperatures of high-temperature fixed-point cells

Todd¹,

Anhalt²,

Bloembergen³

et al. 2021

Metrologia

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In July 2016 the Consultative Committee for Thermometry’s Non-Contact Thermometry Working Group formed a task group to compile a complete list of uncertainties for high-temperature fixed points, categorize them as well specified or not, and recommend areas of future research. We describe herein two paths to realizing T by indirect primary radiometry using high-temperature fixed-point blackbody cells: one in which published values for the metal–carbon eutectic material transition temperatures are used and the other where a set of cells has their transition temperatures determined directly. The uncertainty components that need to be considered for each path are given together with typically achievable values and how well those values are known. This work concentrates on Co–C, Pt–C and Re–C.

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“…The high temperature blackbody is a Re-C eutectic fixed point cell which has been fully characterised in previous papers [19,20] as well as thermal gradients coming from the furnace and the cell design. In this paper, the temperature of the Re-C blackbody was fixed slightly above (2760 K) the liquidus temperature (2748 K) thanks to a feedback-loop reacting on the supply current of the oven electrical heater.…”

Section: Measurement Of Blackbody Temperature With Its-90 Scheme Over...mentioning

confidence: 99%

The synthetic double wavelength technique: a simple robust method for thermodynamic temperature determination

et al. 2020

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This paper describes a new relative technique developed at LNE-Cnam, for the determination of the thermodynamic temperature of blackbodies without recourse to a radiometric reference. This technique is referred to as the ‘synthetic double wavelength technique’ (SDWT) as it is considered to be a particular case of the ‘double wavelength technique’ (DWT). It offers a new experimental technique for the determination of the thermodynamic temperature at high temperature and as such a new means for the mise-en-pratique of the new definition of the kelvin achievable by any national metrology institute provided a multi-wavelength radiation thermometer combining large and narrow bandwidths is available. In this work, a first experimental implementation of this technique based on a wavelength-tuneable spectroradiometer providing both narrowband and broadband signals with the particularity of the broadband signal being virtually synthesised from the spectral distribution of the narrowband signals sampled over a wide spectral range. SDWT determination of the thermodynamic temperature of a blackbody at 2760 K was performed with a level of uncertainty that confirms the promising capabilities of this technique.

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The equilibrium liquidus temperatures of rhenium–carbon, platinum–carbon and cobalt–carbon eutectic alloys

Cited by 26 publications

References 16 publications

Towards Realising the Redefined Kelvin

Towards Realising the Redefined Kelvin

On the uncertainties in the realization of the kelvin based on thermodynamic temperatures of high-temperature fixed-point cells

The synthetic double wavelength technique: a simple robust method for thermodynamic temperature determination

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