Synthesis and Characterization of High Entropy Alloy 23Fe-21Cr-18Ni-20Ti-18Mn for Electrochemical Sensor Applications
High entropy alloys (HEA) are one of the modern-era alloys accelerating with greater velocity because of their excellent properties and different applications. In the present paper, we have successfully fabricated HEA (23Fe-21Cr-18Ni-20Ti-18Mn) powders by ball milling the elemental Fe, Cr, Ni, Ti, a...
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MDPI AG
2022-10-01
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| author | Shashanka Rajendrachari Vinayak Adimule Mahir Gulen Farshid Khosravi Kiran Kenchappa Somashekharappa |
| author_facet | Shashanka Rajendrachari Vinayak Adimule Mahir Gulen Farshid Khosravi Kiran Kenchappa Somashekharappa |
| author_sort | Shashanka Rajendrachari |
| collection | DOAJ |
| description | High entropy alloys (HEA) are one of the modern-era alloys accelerating with greater velocity because of their excellent properties and different applications. In the present paper, we have successfully fabricated HEA (23Fe-21Cr-18Ni-20Ti-18Mn) powders by ball milling the elemental Fe, Cr, Ni, Ti, and Mn powders for 15 h. The advancement of the milling process and phase transformation of HEAs were studied by using X-ray diffraction (XRD) and scanning electron microscope (SEM). The crystallite size and the lattice strain of the HEA were calculated by using the Williamson-Hall (W-H) equation and the values were found to be 7 nm and 0.0176%, respectively. Similarly, the true lattice parameter was calculated using the Nelson–Riley (N-R) extrapolation method, and the value was found to be 3.544 Å. We have successfully investigated the electrochemical response of 15 h ball milled 23Fe-21Cr-18Ni-20Ti-18Mn HEA powders to determine the ascorbic acid (AA) using cyclic voltammetry. We have modified the carbon paste electrode with ball milled HEA of concentrations 0, 2, 4, 6, 8, and 10 mg, and among them, 8 mg HEA modified carbon paste electrode (HEA-MCPE) depicted the highest current sensitivity. We reported the effect of modifier concentration, analyte concentration, scan rate, and pH on the oxidation peak of AA. The electrochemical active surface area of carbon paste and MCPE was calculated using the Nernst equation and the values were found to be 0.0014 cm<sup>2</sup> and 0.0027 cm<sup>2</sup>, respectively. The fabricated HEA-MCPE showed excellent current sensitivity, stability, anti-fouling, and selectivity. |
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| issn | 1996-1944 |
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| last_indexed | 2024-03-09T18:53:58Z |
| publishDate | 2022-10-01 |
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| spelling | doaj.art-9b02f7d72c9641c2a53c153935caad5f2023-11-24T05:37:40ZengMDPI AGMaterials1996-19442022-10-011521759110.3390/ma15217591Synthesis and Characterization of High Entropy Alloy 23Fe-21Cr-18Ni-20Ti-18Mn for Electrochemical Sensor ApplicationsShashanka Rajendrachari0Vinayak Adimule1Mahir Gulen2Farshid Khosravi3Kiran Kenchappa Somashekharappa4Department of Metallurgical and Materials Engineering, Bartin University, 74100 Bartin, TurkeyDepartment of Chemistry, Angadi Institute of Technology and Management (AITM), Belagavi 590009, IndiaMechanical Engineering Department, Faculty of Engineering, Bartin University, 74100 Bartin, TurkeyMechanical Engineering Department, Faculty of Engineering, Bartin University, 74100 Bartin, TurkeyDepartment of Chemistry, Govt. First Grade College, Shivamogga 577201, IndiaHigh entropy alloys (HEA) are one of the modern-era alloys accelerating with greater velocity because of their excellent properties and different applications. In the present paper, we have successfully fabricated HEA (23Fe-21Cr-18Ni-20Ti-18Mn) powders by ball milling the elemental Fe, Cr, Ni, Ti, and Mn powders for 15 h. The advancement of the milling process and phase transformation of HEAs were studied by using X-ray diffraction (XRD) and scanning electron microscope (SEM). The crystallite size and the lattice strain of the HEA were calculated by using the Williamson-Hall (W-H) equation and the values were found to be 7 nm and 0.0176%, respectively. Similarly, the true lattice parameter was calculated using the Nelson–Riley (N-R) extrapolation method, and the value was found to be 3.544 Å. We have successfully investigated the electrochemical response of 15 h ball milled 23Fe-21Cr-18Ni-20Ti-18Mn HEA powders to determine the ascorbic acid (AA) using cyclic voltammetry. We have modified the carbon paste electrode with ball milled HEA of concentrations 0, 2, 4, 6, 8, and 10 mg, and among them, 8 mg HEA modified carbon paste electrode (HEA-MCPE) depicted the highest current sensitivity. We reported the effect of modifier concentration, analyte concentration, scan rate, and pH on the oxidation peak of AA. The electrochemical active surface area of carbon paste and MCPE was calculated using the Nernst equation and the values were found to be 0.0014 cm<sup>2</sup> and 0.0027 cm<sup>2</sup>, respectively. The fabricated HEA-MCPE showed excellent current sensitivity, stability, anti-fouling, and selectivity.https://www.mdpi.com/1996-1944/15/21/7591microstructureball millinghigh entropy alloysascorbic acidelectrochemical sensorsanodic peak current |
| spellingShingle | Shashanka Rajendrachari Vinayak Adimule Mahir Gulen Farshid Khosravi Kiran Kenchappa Somashekharappa Synthesis and Characterization of High Entropy Alloy 23Fe-21Cr-18Ni-20Ti-18Mn for Electrochemical Sensor Applications Materials microstructure ball milling high entropy alloys ascorbic acid electrochemical sensors anodic peak current |
| title | Synthesis and Characterization of High Entropy Alloy 23Fe-21Cr-18Ni-20Ti-18Mn for Electrochemical Sensor Applications |
| title_full | Synthesis and Characterization of High Entropy Alloy 23Fe-21Cr-18Ni-20Ti-18Mn for Electrochemical Sensor Applications |
| title_fullStr | Synthesis and Characterization of High Entropy Alloy 23Fe-21Cr-18Ni-20Ti-18Mn for Electrochemical Sensor Applications |
| title_full_unstemmed | Synthesis and Characterization of High Entropy Alloy 23Fe-21Cr-18Ni-20Ti-18Mn for Electrochemical Sensor Applications |
| title_short | Synthesis and Characterization of High Entropy Alloy 23Fe-21Cr-18Ni-20Ti-18Mn for Electrochemical Sensor Applications |
| title_sort | synthesis and characterization of high entropy alloy 23fe 21cr 18ni 20ti 18mn for electrochemical sensor applications |
| topic | microstructure ball milling high entropy alloys ascorbic acid electrochemical sensors anodic peak current |
| url | https://www.mdpi.com/1996-1944/15/21/7591 |
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