Sol-gel Autocombustion Synthesis of Nanocrystalline High-entropy Alloys

Niu, Bo; Zhang, Fan; Ping, Hang; Li, Na; Zhou, Jieyang; Lei, Liwen; Xie, Jingjing; Zhang, Jinyong; Wang, Weimin; Fu, Zhengyi

doi:10.1038/s41598-017-03644-6

Cited by 108 publications

(57 citation statements)

References 30 publications

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“…The possibility to obtain bimetallic single-phase metallic alloys using the SCS approach has previously been shown by some of the authors 36 , 44 , 45 . Calculated values of crystalline sizes ( d ) of the NPs, show all to have a high degree of crystallinity with d values ranging from ~ 12 to ~ 28 nm.…”

Section: Resultsmentioning

confidence: 93%

Corrosion and transformation of solution combustion synthesized Co, Ni and CoNi nanoparticles in synthetic freshwater with and without natural organic matter

Khort

Hedberg

Mei

et al. 2021

Sci Rep

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Pure metallic Co, Ni, and their bimetallic compositions of Co3Ni, CoNi, and CoNi3 nanomaterials were prepared by solution combustion synthesis. Microstructure, phase composition, and crystalline structure of these nanoparticles (NPs) were characterized along with studies of their corrosion and dissolution properties in synthetic freshwater with and without natural organic matter (NOM). The nanomaterials consisted of aggregates of fine NPs (3–30 nm) of almost pure metallic and bimetallic crystal phases with a thin surface oxide covered by a thin carbon shell. The nanomaterials were characterized by BET surface areas ranging from ~ 1 to 8 m2/g for the Ni and Co NPs, to 22.93 m2/g, 14.86 m2/g, and 10.53 m2/g for the Co3Ni, CoNi, CoNi3 NPs, respectively. More Co and Ni were released from the bimetallic NPs compared with the pure metals although their corrosion current densities were lower. In contrast to findings for the pure metal NPs, the presence of NOM increased the release of Co and Ni from the bimetallic NPs in freshwater compared to freshwater only even though its presence reduced the corrosion rate (current density). It was shown that the properties of the bimetallic nanomaterials were influenced by multiple factors such as their composition, including carbon shell, type of surface oxides, and the entropy of mixing.

show abstract

Section: Resultsmentioning

confidence: 93%

Corrosion and transformation of solution combustion synthesized Co, Ni and CoNi nanoparticles in synthetic freshwater with and without natural organic matter

Khort

Hedberg

Mei

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Typical XRD patterns and calculated crystalline cell parameters (a, V) of the NPs are shown in Fig 3 and The possibility to obtain bimetallic single-phase metallic alloys using the SCS approach has previously been shown by some of the authors 37,45,46 . Calculated values of crystalline sizes (d) of the NPs,…”

Section: Xrdmentioning

confidence: 90%

Corrosion and Transformation of Solution Combustion Synthesized Co, Ni and CoNi Nanoparticles in Synthetic Freshwater with and without Natural Organic Matter

Khort

Hedberg

Mei

et al. 2020

Preprint

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Pure metallic Co, Ni, and their bimetallic compositions of Co3Ni, CoNi, and CoNi3 nanomaterials were prepared by solution combustion synthesis. Microstructure, phase composition, and crystalline structure of these nanoparticles (NPs) were characterized along with studies of their corrosion and dissolution properties in synthetic freshwater with and without natural organic matter (NOM). The nanomaterials consisted of aggregates of fine NPs (3–30 nm) of almost pure metallic and bimetallic crystal phases with thin surface oxide covered by a thin carbon shell. The nanomaterials were characterized by BET surface areas ranging from ~ 1 to 8 m2/g for the Ni and Co NPs, to 22.93 m2/g, 14.86 m2/g, and 10.53 m2/g for the Co3Ni, CoNi, CoNi3 NPs, respectively. More Co and Ni were released from the bimetallic NPs compared with the pure metals although their corrosion current densities were lower. In contrast to findings for the pure metal NPs, the presence of NOM increased the release of Co and Ni from the bimetallic NPs in freshwater compared to freshwater only even though its presence reduced the corrosion rate (current density). It was shown that the properties of the bimetallic nanomaterials were influenced by multiple factors such as their composition, including carbon shell, type of surface oxides, and the entropy of mixing.

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“…A production route for CoCrCuNiAl-HEA NPs with an average diameter of 14 nm is based on the popular sol-gel autocombustion process. 15 However, no colloidal NPs have been produced by the method so far, and the chemical compositions of the NPs that were synthesized were not studied in detail. By plasma arc discharge synthesis, CoCrCuFeNi-HEA NPs of average diameters larger than 80 nm were produced in a reactive gas atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Kinetically-controlled laser-synthesis of colloidal high-entropy alloy nanoparticles

et al. 2019

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Sol-gel Autocombustion Synthesis of Nanocrystalline High-entropy Alloys

Cited by 108 publications

References 30 publications

Corrosion and transformation of solution combustion synthesized Co, Ni and CoNi nanoparticles in synthetic freshwater with and without natural organic matter

Corrosion and transformation of solution combustion synthesized Co, Ni and CoNi nanoparticles in synthetic freshwater with and without natural organic matter

Corrosion and Transformation of Solution Combustion Synthesized Co, Ni and CoNi Nanoparticles in Synthetic Freshwater with and without Natural Organic Matter

Kinetically-controlled laser-synthesis of colloidal high-entropy alloy nanoparticles

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