Evaluation of thermal properties of CuCrFeV (Ti, Ta, W, Mo) for nuclear fusion applications
This work investigates the influence of composition on the thermal properties of the high entropy alloy family Cu5Cr35Fe35V20-X5 (at. %), where X = Ti, Ta, W or Mo in the framework of acting as a thermal barrier between the W-based plasma-facing elements and the CuCrZr or Cu-based heat sink compone...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-12-01
|
| Series: | Nuclear Materials and Energy |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S235217912400190X |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846113693912268800 |
|---|---|
| author | A. Rodríguez-López B. Savoini M.A. Monge A. Galatanu M. Galatanu |
| author_facet | A. Rodríguez-López B. Savoini M.A. Monge A. Galatanu M. Galatanu |
| author_sort | A. Rodríguez-López |
| collection | DOAJ |
| description | This work investigates the influence of composition on the thermal properties of the high entropy alloy family Cu5Cr35Fe35V20-X5 (at. %), where X = Ti, Ta, W or Mo in the framework of acting as a thermal barrier between the W-based plasma-facing elements and the CuCrZr or Cu-based heat sink components of the fusion reactor. The alloys were produced by arc melting and their microstructure and mechanical properties were previously characterized by XRD, SEM, and Vickers hardness measurements. Thermal properties have been measured on as-cast at thermally treated alloys using the laser flash method in the temperature range 25 °C to 600 °C to determine the thermal diffusivity, α, thermal conductivity, λ, and specific heat, Cp. Dilatometry experiments were also carried out to obtain the linear thermal expansion coefficient, CTE, as a function of temperature.For all materials, the thermal conductivity increases with temperature from 15 W/m·K at RT to 28 W/m·K at 600 °C and does not significantly depend on the thermal treatment for the Mo-HEA and W-HEA, but increases after aging for the Ta-HEA and Ti-HEA. These values are lower than those of W (∼122 W/m·K at 600 °C) and much lower than for CuCrZr-IG (∼354 W/m·K at 400 °C). The thermal expansion coefficients of these HEAs, ∼10 × 10−6 °C−1 at RT and ∼ 2 × 10−6 °C−1 at 650 °C are between those of CuCrZr and the W for the entire operative temperature range. These results indicate that the Cu5Cr35Fe35V20-X5 (X = Ti, Ta, W, Mo) HEAs have a promising combination of the thermophysical properties, λ, Cp and CTE, to act as thermal barrier in plasma-facing components that require the union of W- and Cu-based materials. |
| format | Article |
| id | doaj-art-09a47fb11f4740fe91eed9326be451b4 |
| institution | Kabale University |
| issn | 2352-1791 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj-art-09a47fb11f4740fe91eed9326be451b42024-12-21T04:28:20ZengElsevierNuclear Materials and Energy2352-17912024-12-0141101767Evaluation of thermal properties of CuCrFeV (Ti, Ta, W, Mo) for nuclear fusion applicationsA. Rodríguez-López0B. Savoini1M.A. Monge2A. Galatanu3M. Galatanu4Universidad Carlos III de Madrid, Dpto. de Física, Avda. de la Universidad 30, Leganés 28911, SpainUniversidad Carlos III de Madrid, Dpto. de Física, Avda. de la Universidad 30, Leganés 28911, Spain; Instituto Tecnológico de Química y Materiales Álvaro Alonso Barba (IAAB), Avda. de la Universidad 30, Leganés 28911, SpainUniversidad Carlos III de Madrid, Dpto. de Física, Avda. de la Universidad 30, Leganés 28911, Spain; Instituto Tecnológico de Química y Materiales Álvaro Alonso Barba (IAAB), Avda. de la Universidad 30, Leganés 28911, Spain; Corresponding author.National Institute of Materials Physics, Magurele 077125, RomaniaNational Institute of Materials Physics, Magurele 077125, RomaniaThis work investigates the influence of composition on the thermal properties of the high entropy alloy family Cu5Cr35Fe35V20-X5 (at. %), where X = Ti, Ta, W or Mo in the framework of acting as a thermal barrier between the W-based plasma-facing elements and the CuCrZr or Cu-based heat sink components of the fusion reactor. The alloys were produced by arc melting and their microstructure and mechanical properties were previously characterized by XRD, SEM, and Vickers hardness measurements. Thermal properties have been measured on as-cast at thermally treated alloys using the laser flash method in the temperature range 25 °C to 600 °C to determine the thermal diffusivity, α, thermal conductivity, λ, and specific heat, Cp. Dilatometry experiments were also carried out to obtain the linear thermal expansion coefficient, CTE, as a function of temperature.For all materials, the thermal conductivity increases with temperature from 15 W/m·K at RT to 28 W/m·K at 600 °C and does not significantly depend on the thermal treatment for the Mo-HEA and W-HEA, but increases after aging for the Ta-HEA and Ti-HEA. These values are lower than those of W (∼122 W/m·K at 600 °C) and much lower than for CuCrZr-IG (∼354 W/m·K at 400 °C). The thermal expansion coefficients of these HEAs, ∼10 × 10−6 °C−1 at RT and ∼ 2 × 10−6 °C−1 at 650 °C are between those of CuCrZr and the W for the entire operative temperature range. These results indicate that the Cu5Cr35Fe35V20-X5 (X = Ti, Ta, W, Mo) HEAs have a promising combination of the thermophysical properties, λ, Cp and CTE, to act as thermal barrier in plasma-facing components that require the union of W- and Cu-based materials.http://www.sciencedirect.com/science/article/pii/S235217912400190XHigh entropy alloyThermal propertiesThermal conductivityThermal expansion coefficientThermal barrierInterlayer |
| spellingShingle | A. Rodríguez-López B. Savoini M.A. Monge A. Galatanu M. Galatanu Evaluation of thermal properties of CuCrFeV (Ti, Ta, W, Mo) for nuclear fusion applications Nuclear Materials and Energy High entropy alloy Thermal properties Thermal conductivity Thermal expansion coefficient Thermal barrier Interlayer |
| title | Evaluation of thermal properties of CuCrFeV (Ti, Ta, W, Mo) for nuclear fusion applications |
| title_full | Evaluation of thermal properties of CuCrFeV (Ti, Ta, W, Mo) for nuclear fusion applications |
| title_fullStr | Evaluation of thermal properties of CuCrFeV (Ti, Ta, W, Mo) for nuclear fusion applications |
| title_full_unstemmed | Evaluation of thermal properties of CuCrFeV (Ti, Ta, W, Mo) for nuclear fusion applications |
| title_short | Evaluation of thermal properties of CuCrFeV (Ti, Ta, W, Mo) for nuclear fusion applications |
| title_sort | evaluation of thermal properties of cucrfev ti ta w mo for nuclear fusion applications |
| topic | High entropy alloy Thermal properties Thermal conductivity Thermal expansion coefficient Thermal barrier Interlayer |
| url | http://www.sciencedirect.com/science/article/pii/S235217912400190X |
| work_keys_str_mv | AT arodriguezlopez evaluationofthermalpropertiesofcucrfevtitawmofornuclearfusionapplications AT bsavoini evaluationofthermalpropertiesofcucrfevtitawmofornuclearfusionapplications AT mamonge evaluationofthermalpropertiesofcucrfevtitawmofornuclearfusionapplications AT agalatanu evaluationofthermalpropertiesofcucrfevtitawmofornuclearfusionapplications AT mgalatanu evaluationofthermalpropertiesofcucrfevtitawmofornuclearfusionapplications |