Thermoelectric behaviour with high lattice thermal conductivity of Nickel base Ni2CuCrFeAlx (x = 0.5, 1.0, 1.5 and 2.5) high entropy alloys
In this article, investigated Ni-based Ni _2 CuCrFeAl _x (0.5 ≤ x ≤ 2.5) alloys were prepared by powder metallurgy route. On varying x , the alloy changes from single FCC to single BCC with a transition duplex in FCC/BCC region. The severe scattering effect of lattice in these high-entropy alloys w...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ab7d5a |
| _version_ | 1797746424014700544 |
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| author | Lav Kush Sanjay Srivastava Yash Jaiswal Yogesh Srivastava |
| author_facet | Lav Kush Sanjay Srivastava Yash Jaiswal Yogesh Srivastava |
| author_sort | Lav Kush |
| collection | DOAJ |
| description | In this article, investigated Ni-based Ni _2 CuCrFeAl _x (0.5 ≤ x ≤ 2.5) alloys were prepared by powder metallurgy route. On varying x , the alloy changes from single FCC to single BCC with a transition duplex in FCC/BCC region. The severe scattering effect of lattice in these high-entropy alloys was observed by weak x-ray diffraction intensities. Also, owing to this lattice effect, the observed electrical and thermal conductivity are much smaller than those of pure metal components. On a contrary, because of additional scattering effect of FCC/BCC phase boundaries in the alloys, both conductivity values are even higher than those in the duplex phase region. Present work explains the properties of temperature dependant High-Entropy alloys (HEA’s) as a potential new class of thermoelectric materials. The thermoelectric properties can be controlled significantly by changing the valence electron concentration via appropriate substitutional elements. Both the electrical and thermal properties were found to decrease with a lower VEC number. These findings highlight the possibility to exploit HEA’s as a new class of futuristic high temperature TE materials. |
| first_indexed | 2024-03-12T15:37:36Z |
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| id | doaj.art-b299b575ee164c6c9e1acb41c19ff933 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:37:36Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-b299b575ee164c6c9e1acb41c19ff9332023-08-09T16:10:38ZengIOP PublishingMaterials Research Express2053-15912020-01-017303570410.1088/2053-1591/ab7d5aThermoelectric behaviour with high lattice thermal conductivity of Nickel base Ni2CuCrFeAlx (x = 0.5, 1.0, 1.5 and 2.5) high entropy alloysLav Kush0https://orcid.org/0000-0001-5939-2545Sanjay Srivastava1Yash Jaiswal2Yogesh Srivastava3Department of Materials and Metallurgical Engineering, Maulana Azad National Institute of Technology Bhopal, Madhya Pradesh-462003, IndiaDepartment of Materials and Metallurgical Engineering, Maulana Azad National Institute of Technology Bhopal, Madhya Pradesh-462003, IndiaDepartment of Chemical Engineering, Maulana Azad National Institute of Technology Bhopal, Madhya Pradesh-462003, IndiaDepartment of Materials and Metallurgical Engineering, Maulana Azad National Institute of Technology Bhopal, Madhya Pradesh-462003, IndiaIn this article, investigated Ni-based Ni _2 CuCrFeAl _x (0.5 ≤ x ≤ 2.5) alloys were prepared by powder metallurgy route. On varying x , the alloy changes from single FCC to single BCC with a transition duplex in FCC/BCC region. The severe scattering effect of lattice in these high-entropy alloys was observed by weak x-ray diffraction intensities. Also, owing to this lattice effect, the observed electrical and thermal conductivity are much smaller than those of pure metal components. On a contrary, because of additional scattering effect of FCC/BCC phase boundaries in the alloys, both conductivity values are even higher than those in the duplex phase region. Present work explains the properties of temperature dependant High-Entropy alloys (HEA’s) as a potential new class of thermoelectric materials. The thermoelectric properties can be controlled significantly by changing the valence electron concentration via appropriate substitutional elements. Both the electrical and thermal properties were found to decrease with a lower VEC number. These findings highlight the possibility to exploit HEA’s as a new class of futuristic high temperature TE materials.https://doi.org/10.1088/2053-1591/ab7d5ahigh entropy alloyspowder metallurgyXRD analysisDSC analysisthermoelectric(TE)electrical and thermal conductivity |
| spellingShingle | Lav Kush Sanjay Srivastava Yash Jaiswal Yogesh Srivastava Thermoelectric behaviour with high lattice thermal conductivity of Nickel base Ni2CuCrFeAlx (x = 0.5, 1.0, 1.5 and 2.5) high entropy alloys Materials Research Express high entropy alloys powder metallurgy XRD analysis DSC analysis thermoelectric(TE) electrical and thermal conductivity |
| title | Thermoelectric behaviour with high lattice thermal conductivity of Nickel base Ni2CuCrFeAlx (x = 0.5, 1.0, 1.5 and 2.5) high entropy alloys |
| title_full | Thermoelectric behaviour with high lattice thermal conductivity of Nickel base Ni2CuCrFeAlx (x = 0.5, 1.0, 1.5 and 2.5) high entropy alloys |
| title_fullStr | Thermoelectric behaviour with high lattice thermal conductivity of Nickel base Ni2CuCrFeAlx (x = 0.5, 1.0, 1.5 and 2.5) high entropy alloys |
| title_full_unstemmed | Thermoelectric behaviour with high lattice thermal conductivity of Nickel base Ni2CuCrFeAlx (x = 0.5, 1.0, 1.5 and 2.5) high entropy alloys |
| title_short | Thermoelectric behaviour with high lattice thermal conductivity of Nickel base Ni2CuCrFeAlx (x = 0.5, 1.0, 1.5 and 2.5) high entropy alloys |
| title_sort | thermoelectric behaviour with high lattice thermal conductivity of nickel base ni2cucrfealx x 0 5 1 0 1 5 and 2 5 high entropy alloys |
| topic | high entropy alloys powder metallurgy XRD analysis DSC analysis thermoelectric(TE) electrical and thermal conductivity |
| url | https://doi.org/10.1088/2053-1591/ab7d5a |
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