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Phase transformations of the Ag-Cu nanoparticles

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Year of publication 2014
Type Conference abstract
MU Faculty or unit

Faculty of Science

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Description The near-eutectic composition Ag-Cu nanoparticles (NPs) were prepared by solvothermal synthesis from metallo-organic precursors. The nanoparticle size was measured by dynamic light scattering (DLS). The size and shape were evaluated by electron microscopy (TEM and HRTEM). The phase diagrams of the AgCu system of both bulk alloy and nanoparticles were calculated [1] by the CALPHAD method [2] and then compared with experimental findings. Thermal behaviour was investigated by differential scanning calorimetry (DSC) and temperature controlled X-ray diffraction method (t-XRD). The observed phase transformations were AgCu bulk alloy melting (BM), nanoparticle melting point depression (MPD) and spinodal decomposition (SD). Moreover NPs aggregation and low temperature sintering (LTS) phenomena were observed experimentally too. The electron microscopy (TEM, SEM) observation was used for bulk alloy, microparticles (MP), and nanoparticles. The experimental characterisation and investigations show that prepared AgCu nanoparticles undergoes changes that results to occurrence of the bulk, microparticles and nanoparticles in dependence to temperature heat treatment and stabilization functionalization.
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