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<p>Specific heat of liquid iron, nickel, and zirconium has been measured by a new kind of aerodynamic levitation facility. The heating is ensured by a laser and a three-color pyrometer has been developed to measure dynamically both temperature and absorptivity of the sample at laser wavelength. A heat balance on a temperature plateau allows to determine the heat losses, and the cooling is then used to determine the specific heat. This new method provides results for a large temperature range above the melting point and without the assumption of constant emissivity. Results are compared with data obtained by others contactless methods available in literature, and present good agreement. This original method offers the specific heat of iron between 2000&#xa0;K and 2337&#xa0;K. The specific heat of nickel is determined between 1838&#xa0;K and 2162&#xa0;K. The specific heat of liquid zirconium is measured between 2283&#xa0;K and 2754&#xa0;K. Proposed values complete or extend a very limited literature for these materials at the liquid state.</p>

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A New Approach to Determining the Specific Heat of Liquid Metals at High Temperatures by Aerodynamic Levitation

  • 期刊论文

  • 发表日期：

    2025年11月18日

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  • Maelenn Le Mener,
  • Coline Bourges,
  • Elodie Courtois,
  • Thomas Pierre,
  • Mickael Courtois

摘要

Specific heat of liquid iron, nickel, and zirconium has been measured by a new kind of aerodynamic levitation facility. The heating is ensured by a laser and a three-color pyrometer has been developed to measure dynamically both temperature and absorptivity of the sample at laser wavelength. A heat balance on a temperature plateau allows to determine the heat losses, and the cooling is then used to determine the specific heat. This new method provides results for a large temperature range above the melting point and without the assumption of constant emissivity. Results are compared with data obtained by others contactless methods available in literature, and present good agreement. This original method offers the specific heat of iron between 2000 K and 2337 K. The specific heat of nickel is determined between 1838 K and 2162 K. The specific heat of liquid zirconium is measured between 2283 K and 2754 K. Proposed values complete or extend a very limited literature for these materials at the liquid state.