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Towards the development of high temperature comparison artifacts for radiation thermometry.

Teixeira, R N*; Machin, G; Orlando, A* (2013) Towards the development of high temperature comparison artifacts for radiation thermometry. AIP Conf. Proc., 1552. pp. 363-368.

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Abstract

This paper describes the methodology and first results of the development of high temperature fixed point artifacts of unknown temperature suitable for scale comparison purposes. This study is being undertaken at the Thermal Metrology Division of Inmetro, Brazil, as part of PhD studies. In this initial phase of the study two identical cobalt carbon eutectic cells were constructed and one doped with a konwn amount of copper. This was an attempt to achieve a controlled change in the transition temperature of the alloy during melting. Copper was chosen due to the relatively simple phase diagram it forms with carbon and cobalt. The cobalt, in powder form, was supplied by Alfa Aesar at 99.998 % purity, and was mixed with carbon powder (1,9 % by weight) of 99.9999 % purity. Complete filling of the crucible took 6 steps and was performed in a vertical furnace with graphite heating elements, in an inert gas atmosphere.

Item Type: Article
Keywords: key comparisons, high temperature fixed points, radiation thermometry, radiometry
Subjects: Engineering Measurements
Engineering Measurements > Thermal
Identification number/DOI: 10.1063/1.4821388
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/5957

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