A5016784538- Electron and X-Ray Spectroscopy Techniques
- Graphene research and applications
- High-Temperature Coating Behaviors
- Glass properties and applications
- Advanced materials and composites
- Advancements in Battery Materials
- Hydrogen embrittlement and corrosion behaviors in metals
- Advanced Materials Characterization Techniques
- Fiber-reinforced polymer composites
- Silicon Carbide Semiconductor Technologies
- Aluminum Alloy Microstructure Properties
- Fusion materials and technologies
- Magnetic properties of thin films
- Surface and Thin Film Phenomena
- Semiconductor materials and devices
- Advanced Battery Technologies Research
- Microstructure and Mechanical Properties of Steels
- Pigment Synthesis and Properties
- Advanced Battery Materials and Technologies
- Ga2O3 and related materials
- Transition Metal Oxide Nanomaterials
- Aluminum Alloys Composites Properties
- Material Dynamics and Properties
- Microstructure and mechanical properties
- Nuclear Materials and Properties
University of Wrocław
2016-2025
The surface segregation process and its influence on high-temperature corrosion of five alloys—Fe0.95Al0.05, Fe0.95V0.05, Fe0.90Al0.05V0.05, Fe0.95Ti0.05 Fe0.95Ge0.05—were studied using X-ray photoelectron spectroscopy (XPS) 57Fe Transmission Mössbauer Spectroscopy (TMS). To prepare the alloys with highest concentration solutes, samples were annealed at elevated temperatures to induce process. After that, they exposed air 870 K for 1 5 h. It was found that sample 1073 had much better...
Abstract The surface segregation of Fe-Cr-Si alloys was studied using the X-ray photoelectron spectroscopy (XPS). experiment performed in two stages, for as-prepared samples and after oxidation process. Analysis measured XPS spectra allowed one to characterize changes chemical composition during thermal treatment procedures. According obtained results, it could be stated that enhanced anti-corrosion properties which contain more than 10 at. pct Cr 5 Si bulk are mainly connected with strong...
In this work, platinum silicide formation on selected semiconductors surfaces: Si(1 0 0), 1 1), 4H-SiC(0 1) and graphene–4H-SiC(0 via thermal annealing intercalation process are investigated. Growth morphology stability of formed silicides studied using X-ray Photoelectron Spectroscopy (XPS) Low Energy Electron Diffraction (LEED). Results chemical composition observed reconstructions corresponding to each substrate discussed compared. Despite graphene surface, takes place already at room...
In this work, the influence of intercalated gadolinium (Gd) atoms on graphene-4H-SiC(0001) properties are presented, using X-ray photoelectron spectroscopy, low energy electron diffraction and density functional theory calculations. Detailed analysis, ranging from adsorption to temperature induced intercalation under graphene, chemical composition, surface structures, charge transfer changes in graphene band structure is performed. The investigation carried out for various initial Gd film...
Powders with nanometric crystallites of two ternary alloys Fe0.90Cr0.05Si0.05 and Fe0.85Cr0.10Si0.05 were prepared by mechanical alloying (MA) in a planetary high-energy ball mill at various milling times followed annealing vacuum 900 K to induce an oxygen-induced surface segregation Cr Si atoms. The powders characterized X-ray diffraction (XRD), photoelectron spectroscopy (XPS) scanning electron microscopy (SEM). obtained results show that all crystallize the body-centered cubic structure...
Abstract A new route for the synthesis of (NbTa) $$_{0.67}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mrow /> <mml:mrow> <mml:mn>0.67</mml:mn> </mml:mrow> </mml:msub> </mml:math> (TiHfZr) $$_{0.33}$$ <mml:mn>0.33</mml:mn> C and (MoHfW) high-entropy carbides powders by mechanical alloying is presented. Namely, pure metal were wet-milled in toluene using a planetary mill under an argon atmosphere. The synthesized materials crystallize with rock-salt structure...
Herein, Na x Fe 1– y Mn O 2 ( = 0.4, 0.5, 0.6, 0.7, and 0.8) oxides, which are a potential cathode materials group for Na‐ion batteries, presented. Samples prepared by solid‐state synthesis crystallized in P2‐type structure (P6 3 /mmc). Mössbauer spectroscopy studies revealed that pristine deintercalated samples the whole iron occurs at high‐spin 3+ state. Electrochemical impedance measurements exhibited thermally activated electrical conductivity of 0.67 with relatively high activation...
The high-temperature corrosion behavior of three polycrystalline Fe-Si alloys containing approximately 4, 5, and 10 at% Si was studied using transmission Mössbauer spectroscopy (TMS), conversion electron (CEMS), x-ray photoelectron (XPS). XPS measurements reveal the strong segregation process silicon atoms to surface. Moreover, obtained results suggest that presence adsorbed oxygen on surface effectively enhances process. On other hand, TMS CEMS spectra show even 10% dissolved in iron matrix...
Abstract In this work, adsorption of Ti and Zr on the 6H‐SiC(0001) surface under oxygen pressure about 5×10 −6 Pa was studied. The topography, chemical composition thermal stability were investigated using X‐ray photoelectron spectroscopy (XPS) scanning tunneling microscopy (STM). results show that deposition titanium oxide onto SiC in island growth (Volmer–Weber type), which clearly seen STM images, whereas oxides adsorb, rather uniformly, an almost layer‐by‐layer mode. XPS study shows...
In this work, the influence of intercalated Gd atoms on graphene-4H-SiC(0001) properties are presented, using X-ray Photoelectron Spectroscopy, Low Energy Electron Diffraction and Density Functional Theory calculations. Ranging from adsorption to temperature induced intercalation under graphene detailed analysis chemical composition, occurred surface structures, detected charge transfer changes in band structure performed. It has been shown that already after gadolinium induces n-type doping...