Characterization of Cu-Ni nanostructured alloys obtained by a chemical route. Influence of the complexing agent content in the starting solution
The influence of the amount of complexing agent added to the starting solution on the physicochemical properties of Cu-Ni nanostructured alloys obtained through a chemical route, was studied. For this purpose, three Cu-Ni nanoalloy samples were synthesized by a previously developed procedure, starti...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/183245 |
| Acceso en línea: | http://hdl.handle.net/11336/183245 |
| Access Level: | acceso abierto |
| Palabra clave: | CHEMICAL SYNTHESIS CRYSTAL STRUCTURE CU-NI ALLOYS ELECTRON MICROSCOPY NANOSTRUCTURED MATERIALS X-RAY ANALYSIS https://purl.org/becyt/ford/2.10 https://purl.org/becyt/ford/2 |
| Sumario: | The influence of the amount of complexing agent added to the starting solution on the physicochemical properties of Cu-Ni nanostructured alloys obtained through a chemical route, was studied. For this purpose, three Cu-Ni nanoalloy samples were synthesized by a previously developed procedure, starting from solutions with citric acid to metal molar ratios (C/Me) of 0.73, 1.00 and 1.50. The synthesis technique consisted in preparing a precursor via the citrate-gel method, and carrying out subsequent thermal treatments in controlled atmospheres. Sample characterization was performed by scanning electron microscopy, X-ray microanalysis, X-ray diffraction, transmission electron microscopy, X-ray nanoanalysis and electron diffraction. In the three cases, copper and nickel formed a solid solution with a Cu/Ni atomic ratio close to 50/50, and free of impurities inside the crystal structure. The citric acid content of the starting solution proved to have an important influence on the morphology, size distribution, porosity, and crystallinity of the Cu-Ni alloy microparticles obtained, but a lesser influence on their chemical composition. The molar ratio C/Me = 1.00 resulted in the alloy with the Cu/Ni atomic ratio closest to 50/50. |
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