Influence of Ni2+/Co2+ ratio in electrolyte on morphology, structure and magnetic properties of electrolytically produced Ni−Co alloy powders
Autori
Maksimović, VesnaKusigerski, Vladan
Stoiljković, Milovan
Maletaškić, Jelena
Nikolić, Nebojša D.
Članak u časopisu (Objavljena verzija)
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© 2020 Elsevier Ltd.
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Nickel−cobalt (Ni−Co) alloy powders were produced galvanostatically by using sulphate electrolytes withvarious ratios of Ni2+/Co2+ (mole ratios). The morphology, phase structure, chemical composition and magneticproperties were examined by scanning electron microscope (SEM), X-ray diffractometer (XRD), atomic emissionspectrometer (AES), and SQUID-based magnetometer, respectively. Morphology of the particles changed fromcauliflower-like and dendritic to coral-like and spongy-like ones with increasing Ni2+/Co2+ ratio from 0.25 to 4.0. XRDanalysis of the Ni−Co powders revealed that the decrease of Ni2+/Co2+ ratios (the increase of Co content) caused achange of structure from face centered cubic (FCC) obtained for the ratios of 4.0, 1.5 and 0.67 to a mixture of FCC andhexagonal closed-packed (HCP) phases for the ratio of 0.25. The increasing content of nickel led to change ofmechanism of electrolysis from irregular (up to ~40 wt.% Ni in the electrolytes) to close to equilibrium (between~40... and 60 wt.% Ni in the electrolytes) and anomalous co-deposition (over 60 wt.% Ni in the electrolytes) type. All ofthe obtained Ni−Co alloy samples behaved as soft magnetic materials while their magnetic parameters showedimmediate composition dependence since both coercivity and saturation magnetization almost linearly increased withincrease of the Co content.
Ključne reči:
Ni−Co alloy powders / electrolysis / hydrogen / morphology / magnetic propertiesIzvor:
Transactions of Nonferrous Metals Society of China, 2020, 30, 4, 1046-1057Finansiranje / projekti:
- Sinteza, procesiranje i karakterizacija nanostrukturnih materijala za primenu u oblasti energije, mehaničkog inženjerstva, zaštite životne stredine i biomedicine (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45012)
- Efekti dejstva laserskog zračenja i plazme na savremene materijale pri njihovoj sintezi, modifikaciji i analizi (RS-MESTD-Basic Research (BR or ON)-172019)
- Magnetni i radionuklidima obeleženi nanostrukturni materijali za primene u medicini (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45015)
DOI: 10.1016/S1003-6326(20)65276-1
ISSN: 1003-6326
WoS: 000531812800018
Scopus: 2-s2.0-85083833160
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Institucija/grupa
VinčaTY - JOUR AU - Maksimović, Vesna AU - Kusigerski, Vladan AU - Stoiljković, Milovan AU - Maletaškić, Jelena AU - Nikolić, Nebojša D. PY - 2020 UR - https://vinar.vin.bg.ac.rs/handle/123456789/8950 AB - Nickel−cobalt (Ni−Co) alloy powders were produced galvanostatically by using sulphate electrolytes withvarious ratios of Ni2+/Co2+ (mole ratios). The morphology, phase structure, chemical composition and magneticproperties were examined by scanning electron microscope (SEM), X-ray diffractometer (XRD), atomic emissionspectrometer (AES), and SQUID-based magnetometer, respectively. Morphology of the particles changed fromcauliflower-like and dendritic to coral-like and spongy-like ones with increasing Ni2+/Co2+ ratio from 0.25 to 4.0. XRDanalysis of the Ni−Co powders revealed that the decrease of Ni2+/Co2+ ratios (the increase of Co content) caused achange of structure from face centered cubic (FCC) obtained for the ratios of 4.0, 1.5 and 0.67 to a mixture of FCC andhexagonal closed-packed (HCP) phases for the ratio of 0.25. The increasing content of nickel led to change ofmechanism of electrolysis from irregular (up to ~40 wt.% Ni in the electrolytes) to close to equilibrium (between~40 and 60 wt.% Ni in the electrolytes) and anomalous co-deposition (over 60 wt.% Ni in the electrolytes) type. All ofthe obtained Ni−Co alloy samples behaved as soft magnetic materials while their magnetic parameters showedimmediate composition dependence since both coercivity and saturation magnetization almost linearly increased withincrease of the Co content. T2 - Transactions of Nonferrous Metals Society of China T1 - Influence of Ni2+/Co2+ ratio in electrolyte on morphology, structure and magnetic properties of electrolytically produced Ni−Co alloy powders VL - 30 IS - 4 SP - 1046 EP - 1057 DO - 10.1016/S1003-6326(20)65276-1 ER -
@article{ author = "Maksimović, Vesna and Kusigerski, Vladan and Stoiljković, Milovan and Maletaškić, Jelena and Nikolić, Nebojša D.", year = "2020", abstract = "Nickel−cobalt (Ni−Co) alloy powders were produced galvanostatically by using sulphate electrolytes withvarious ratios of Ni2+/Co2+ (mole ratios). The morphology, phase structure, chemical composition and magneticproperties were examined by scanning electron microscope (SEM), X-ray diffractometer (XRD), atomic emissionspectrometer (AES), and SQUID-based magnetometer, respectively. Morphology of the particles changed fromcauliflower-like and dendritic to coral-like and spongy-like ones with increasing Ni2+/Co2+ ratio from 0.25 to 4.0. XRDanalysis of the Ni−Co powders revealed that the decrease of Ni2+/Co2+ ratios (the increase of Co content) caused achange of structure from face centered cubic (FCC) obtained for the ratios of 4.0, 1.5 and 0.67 to a mixture of FCC andhexagonal closed-packed (HCP) phases for the ratio of 0.25. The increasing content of nickel led to change ofmechanism of electrolysis from irregular (up to ~40 wt.% Ni in the electrolytes) to close to equilibrium (between~40 and 60 wt.% Ni in the electrolytes) and anomalous co-deposition (over 60 wt.% Ni in the electrolytes) type. All ofthe obtained Ni−Co alloy samples behaved as soft magnetic materials while their magnetic parameters showedimmediate composition dependence since both coercivity and saturation magnetization almost linearly increased withincrease of the Co content.", journal = "Transactions of Nonferrous Metals Society of China", title = "Influence of Ni2+/Co2+ ratio in electrolyte on morphology, structure and magnetic properties of electrolytically produced Ni−Co alloy powders", volume = "30", number = "4", pages = "1046-1057", doi = "10.1016/S1003-6326(20)65276-1" }
Maksimović, V., Kusigerski, V., Stoiljković, M., Maletaškić, J.,& Nikolić, N. D.. (2020). Influence of Ni2+/Co2+ ratio in electrolyte on morphology, structure and magnetic properties of electrolytically produced Ni−Co alloy powders. in Transactions of Nonferrous Metals Society of China, 30(4), 1046-1057. https://doi.org/10.1016/S1003-6326(20)65276-1
Maksimović V, Kusigerski V, Stoiljković M, Maletaškić J, Nikolić ND. Influence of Ni2+/Co2+ ratio in electrolyte on morphology, structure and magnetic properties of electrolytically produced Ni−Co alloy powders. in Transactions of Nonferrous Metals Society of China. 2020;30(4):1046-1057. doi:10.1016/S1003-6326(20)65276-1 .
Maksimović, Vesna, Kusigerski, Vladan, Stoiljković, Milovan, Maletaškić, Jelena, Nikolić, Nebojša D., "Influence of Ni2+/Co2+ ratio in electrolyte on morphology, structure and magnetic properties of electrolytically produced Ni−Co alloy powders" in Transactions of Nonferrous Metals Society of China, 30, no. 4 (2020):1046-1057, https://doi.org/10.1016/S1003-6326(20)65276-1 . .