Browsing by Subject "scanning electron microscope (SEM)"

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Access status: Open Access ,
Investigations of microstructure and phase transformations of Fe₇₁.₂₅Si₉.₅B₁₄.₂₅In₅ alloy
(2017) Wojciechowska, Mirosława; Ziewiec, Krzysztof; Ferenc, Jarosław
The aim of this work was to study the microstructure and high-temperature phase transformations of the Fe₇₁.₂₅Si₉.₅B₁₄.₂₅In₅ alloy. The alloy was remelted in a resistance furnace, and a sequence of melting and crystallization at a range of high temperatures was observed using a mid-wave infrared MWIR camera. The alloy was also investigated by differential thermal analysis (DTA). The microstructure of the alloy was studied using a scanning electron microscope SEM with an energy dispersive spectrometer (EDS). The results show that there is a clear partition into two liquids in the studied alloy. The ingot microstructure presents very strong segregation into the eutectic regions enriched in the Fe-Si-B and In-rich regions.
Access status: Open Access ,
Microstructure and phase composition of the Ni-Si-B-Ag-based plasma spray deposit
(2016) Ziewiec, Krzysztof; Wojciechowska, Mirosława; Jasiński, Marcin; Mucha, Dariusz; Lis, Marcin
The aim of this work is to study the possibility of obtaining an amorphous-crystalline composite starting from Ni-Si-B-based powder grade 1559-40 and silver powder. The process of plasma spray deposition was performed on a water-cooled copper substrate. The cooling rate was assessed using a mid-wave infrared MWIR camera. The microstructure of the deposit was studied using scanning electron microscope SEM with an energy dispersive spectrometer EDS. Phase identification was performed using X-ray diffraction XRD. The studies confirmed an amorphous-crystalline microstructure of the deposits. The predominant constituent of the microstructure was amorphous regions enriched in Ni, Si, and B, while the other constituent was Ag-rich crystalline inclusions identified as a face-centered cubic fcc.