TEM, SEM, and X-ray analysis of Cu-Ni alloy nanoparticles

ALEJO C. CARRERAS; M. DE LOS A. CANGIANO; M. W. OJEDA; M. DEL C. RUIZ

Campinas

Jornada; 22ª Reunião Anual de Usuários do LNLS/CNPEM; 2012

Cu{Ni alloys are extensively used in several metallurgical industries. The tradi- tional methods for the synthesis of these alloys have some limitations, mainly re- lated with manufacturing costs and with the homogeneity of the ¯nal product, which encourages the study and development of new methodologies to produce them. In our research group we have developed a new chemical route for the syn- thesis of Cu{Ni alloys [1,2]. The process involves four steps, including the precursor preparation by the citrate-gel method and the subsequent decomposition, calcina- tion and reduction. In this work, the physicochemical characterization of Cu{Ni alloy nanoparticles sinthesized by the new chemical route is presented. The sam- ple characterization was performed by means of Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-Ray Di®raction (XRD). The results of TEM and EDS analyses showed that Cu{Ni alloy nanoparticles with a good chemical homogeneity were ob- tained. The mean Cu/Ni atomic ratio was around 0.98. The XRD diagram showed the formation of a new phase with intermediate lattice parameter between the cor- responding to pure Cu and Ni structures, and with an average grain size around 6 nm. The chemical homogeneity of the alloy obtained is discussed on the basis of the resolution of the analytical techniques used. [1] M. de los A. Cangiano, A. C. Carreras, M. W. Ojeda and M. del C. Ruiz, A new chemical route to sythesize Cu{Ni alloy nanostructured particles. Journal of Alloys and Compounds, 458 (2008) 405-409. [2] M. de los A. Cangiano, M. W. Ojeda, A. C. Carreras, J. A. Gonz¶alez and M. del C. Ruiz, A study of the composition and microstructure of nanodispersed Cu{Ni alloy obtained by di®erent routes from copper and nickel oxides. Materials Characterization, 61 (2010) 1135-1146.Journal of Alloys and Compounds, 458 (2008) 405-409. [2] M. de los A. Cangiano, M. W. Ojeda, A. C. Carreras, J. A. Gonz¶alez and M. del C. Ruiz, A study of the composition and microstructure of nanodispersed Cu{Ni alloy obtained by di®erent routes from copper and nickel oxides. Materials Characterization, 61 (2010) 1135-1146., 458 (2008) 405-409. [2] M. de los A. Cangiano, M. W. Ojeda, A. C. Carreras, J. A. Gonz¶alez and M. del C. Ruiz, A study of the composition and microstructure of nanodispersed Cu{Ni alloy obtained by di®erent routes from copper and nickel oxides. Materials Characterization, 61 (2010) 1135-1146.Materials Characterization, 61 (2010) 1135-1146., 61 (2010) 1135-1146.