In the present work, the glass formation of Zr 59Nb 5Cu 18Ni 8 Al 10 alloys of 2 mm diameter were prepared through casting in water cooled copper mould and in a ribbon form by the single roller melt spinning method. This study is primarily devoted to evaluate the results obtained by the two methods. The thermal stability was evaluated by differential scanning calorimetry (DSC) at a heating rate of 10 °C/mn. The glass formation, structural properties and morphology of the bulk metallic glass are presented, including glass transition temperature (T g) and crystallization temperature (T x). The microstructure and phases composition of the alloy have been analyzed using X-ray diffraction and indicate that the alloy is fully amorphous. The mechanical properties of bulk Zr 59Nb 5Cu 18Ni 8Al 10 alloy is obtained by compression tests at room temperature. The fracture and morphologies after compression test are observed by Scanning Electron Microscopy (SEM), revealed the fragile plastic of the alloy. The Energy Dispersive Spectrometer (EDS) micro-analysis is performed by measuring the energy and intensity distribution of X-ray signals generated by a focused electron beam on the specimen with a diameter 2 mm.
The morphology and mechanical properties of Zr 59Nb 5Cu 18Ni 8AL 10 metallic glasses
BARICCO, Marcello
2012-01-01
Abstract
In the present work, the glass formation of Zr 59Nb 5Cu 18Ni 8 Al 10 alloys of 2 mm diameter were prepared through casting in water cooled copper mould and in a ribbon form by the single roller melt spinning method. This study is primarily devoted to evaluate the results obtained by the two methods. The thermal stability was evaluated by differential scanning calorimetry (DSC) at a heating rate of 10 °C/mn. The glass formation, structural properties and morphology of the bulk metallic glass are presented, including glass transition temperature (T g) and crystallization temperature (T x). The microstructure and phases composition of the alloy have been analyzed using X-ray diffraction and indicate that the alloy is fully amorphous. The mechanical properties of bulk Zr 59Nb 5Cu 18Ni 8Al 10 alloy is obtained by compression tests at room temperature. The fracture and morphologies after compression test are observed by Scanning Electron Microscopy (SEM), revealed the fragile plastic of the alloy. The Energy Dispersive Spectrometer (EDS) micro-analysis is performed by measuring the energy and intensity distribution of X-ray signals generated by a focused electron beam on the specimen with a diameter 2 mm.
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