Thermal conductivity reduction by nanostructuration in electrodeposited CuNi alloys
| Autor: | Enrico Bertero, Maxime Tranchant, Marisol Martín-González, Cristina V. Manzano, Pablo Cervino-Solana, Olga Caballero-Calero, Laetitia Philippe |
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| Přispěvatelé: | Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas (España), Comunidad de Madrid, Ministerio de Economía y Competitividad (España), European Commission, CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI) |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Metallurgy 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Thermoelectric materials 01 natural sciences Nanocrystalline material 0104 chemical sciences Thermal conductivity Electrical resistivity and conductivity Seebeck coefficient Thermoelectric effect Materials Chemistry Figure of merit Crystallite 0210 nano-technology |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Resumen del trabajo presentado en la Virtual Conference on Thermoelectrics, celebrada de forma virtual del 20 al 22 de julio de 2021 In the last years, the use of inexpensive and scalable materials in the industry for thermoelectric applications has received great interest, such as CuNi alloys. In this work, nanocrystalline CuNi alloys with different compositions were grown by pulsed electrodeposition. The incorporation of saccharine in the electrolyte allowed to reduce the crystallite size of the CuNi down to 30-40 nm. The thermoelectric properties, such as electrical conductivity, Seebeck coefficient, and thermal conductivity of these nanocrystalline alloys, were studied. The maximum figure of merit at room temperature obtained was (6.4 ± 1.5)·10-2 for nanocrystalline Cu0.65Ni0.35. The thermal conductivity of CuNi alloys was reduced by the nanostructuration to a value of 9.0 ± 0.9 W/m·K, making these nanocrystalline CuNi alloys more competitive than other more classical thermoelectric materials. This work opens a new field to be investigated, that can be described as the use of commercial alloys such as CuNi for thermoelectric applications, and shows the use of a new approach to enhance the thermoelectric properties of inexpensive and/or fewer pollutant materials. |
| Databáze: | OpenAIRE |
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