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Physics of Metals and Metallography

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01.12.2023 | ELECTRICAL AND MAGNETIC PROPERTIES

Thermal Conductivity and Thermal Diffusivity of Iron in the Temperature Range of 300–1700 K

verfasst von: A. Sh. Agazhanov, D. A. Samoshkin, S. V. Stankus

Erschienen in: Physics of Metals and Metallography | Ausgabe 12/2023

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Abstract

The laser flash method was used to measure the thermal diffusivity (a) of carbonyl iron in the temperature range of 300–1700 K with a detailed study of the critical region of 980–1170 K. The initial experimental data in the field of the magnetic phase transformation are processed by the scaling power law. The values of the critical indexes (γ′, γ) for the thermal diffusivity are obtained below and above the Curie temperature T_С = 1048 ± 5 K; these values are \(\gamma {\kern 1pt} '\) = 0.51 and γ = 0.35, which significantly exceed in magnitude the value of the characteristic critical index for the heat capacity (γ ≈ –0.1). The thermal conductivity (λ) is calculated from the measured data on the thermal diffusivity. The results are compared with the known literature data, and special attention is paid to the behavior of the curves a(T) and λ(T) in the region of the magnetic phase transformation. A table of the recommended temperature dependences for a and λ along with estimated errors has been developed.

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Titel: Thermal Conductivity and Thermal Diffusivity of Iron in the Temperature Range of 300–1700 K
verfasst von: A. Sh. Agazhanov
D. A. Samoshkin
S. V. Stankus
Publikationsdatum: 01.12.2023
Verlag: Pleiades Publishing
Erschienen in: Physics of Metals and Metallography / Ausgabe 12/2023
Print ISSN: 0031-918X
Elektronische ISSN: 1555-6190
DOI: https://doi.org/10.1134/S0031918X2360183X

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