A5039758381- Metallic Glasses and Amorphous Alloys
- Geomagnetism and Paleomagnetism Studies
- Astro and Planetary Science
- Fusion materials and technologies
- Magnetic Properties and Applications
- Microstructure and Mechanical Properties of Steels
- Magnetic Properties of Alloys
- Planetary Science and Exploration
- Glass properties and applications
- Magnetic Properties and Synthesis of Ferrites
- Iron oxide chemistry and applications
- Trace Elements in Health
- Hydrogen embrittlement and corrosion behaviors in metals
- Iron Metabolism and Disorders
- Mineralogy and Gemology Studies
- Magnetic properties of thin films
- Nuclear materials and radiation effects
- Metallurgy and Cultural Artifacts
- Phase-change materials and chalcogenides
- Graphite, nuclear technology, radiation studies
- Thermodynamic and Structural Properties of Metals and Alloys
- Electromagnetic wave absorption materials
- Nuclear Physics and Applications
- Geological and Geochemical Analysis
- High Entropy Alloys Studies
Slovak University of Technology in Bratislava
2015-2024
Information Technology Institute
2021
Abstract The corrosion behavior of 310S austenitic stainless steel, subjected to different surface treatments machined (MA), sandblasting (SB), and polishing (PO), was exposed a 550°C supercritical water (SCW) environment. aged samples were analyzed using variable‐energy slow positron beam techniques. obtained results revealed that the plastic deformation near‐surface region MA SB substantially recovered in SCW conditions. At least two distinct oxide layers formed, oxidation process created...
High‐chromium steels are key alloys used for the construction of technological devices in industry. Stainless suitable components that exposed to a corrosive environment long time because chromium has anticorrosion properties due segregation and formation passivation layer. The physicochemical surface bulk material as well determined by microstructure. Herein, steel NS219 is focused on, where concentration around 13.5 wt%. In order study microstructure steel, Mössbauer spectroscopy used....
The effect of combined presence iron and nickel has been studied in rapidly quenched amorphous (Fe-Ni) <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">81</sub> Nb xmlns:xlink="http://www.w3.org/1999/xlink">7</sub> B xmlns:xlink="http://www.w3.org/1999/xlink">12</sub> system with the ratio Fe/Ni=2/1 1/2 as-quenched state after annealing. Field dependencies magnetostriction as well values saturation were correlated evolution nanocrystalline...
Amorphous and nanocrystalline (Fe1–xNix)81Nb7B12 (x = 0, 0.25, 0.5, 0.75) alloys were measured by M?ssbauer spectrometry in the weak external magnetic field of 0.5 T. From structural analyses, ferromagnetic bcc-FeNi fcc-FeNi paramagnetic (Fe-Ni)23B6 phases identified annealed samples. It was shown that intensities 2nd 5th lines (A23 parameter) are most sensitive parameters. Rather small changes observed values internal field. Our results showed amorphous precursor is more to influence than...
Nanocrystalline (Fe1-xNix)81Nb7B12 (x = 0, 0.25, 0.5, 0.75) and Vitroperm alloys were studied by Mössbauer spectroscopy after neutron irradiation at uences of 10 16 n/cm 2 17 .From structure analyses, we have identied ferromagnetic bcc-FeNi in nanocrystalline state partly paramagnetic (Fe-Ni)23B6 phase.Neutron had an inuence on the magnetic microstructure, which is manifested change parameters, such as direction net moment, intensity internal eld volumetric fraction.The results indicate that...
Iron-based nanomaterials have high technological impacts on various pro-environmental applications, including wastewater treatment using the co-precipitation method. The purpose of this research was to identify changes iron nanomaterial’s structure caused by presence selenium, a typical water contaminant, which might affect removal when method is used. Therefore, we investigated maturation co-precipitated nanosized ferric oxyhydroxides under alkaline conditions and their thermal...
This contribution aims in characterization of structural positions iron human and horse spleen. 57Fe Mössbauer spectroscopy was employed as a principal method investigation addition to X-ray diffraction transmission electron microscopy (TEM). At room temperature, ferritin nanoparticles exhibit superparamagnetic behavior due their small dimensions. Corresponding spectra show doublet-like patterns. Experiments performed at low temperatures unveiled presence magnetically split components...
High-induction Si-poor Fe-Nb-Cu-B-Si Finemet ribbons annealed in inert gas ambience are known to build oxides and prefer surface crystallization. Phosphorus-3 at% of P instead B was substituted see how it can influence these effects. The off-axis magnetic anisotropy caused by surfaces squeezing the ribbon interior reduced found out that major source squeeze is crystallization not oxides. Phosphorus appears hamper preferentially substitution also improves softness vacuum-annealed grain size...
Abstract The 57 Fe Mössbauer spectroscopy method was used to investigate iron-containing compounds in town Košice meteorite fallen on the territory of Slovakia February 2010. results showed that spectra consisted magnetic and non-magnetic components related different iron-bearing phases. phase includes olivine, pyroxene traces 3+ component comprises troilite (FeS) iron-rich Fe-Ni alloy with hyperfine field typical for kamacite. Samples from were obtained powder depths inspect its...
Nanocrystalline (Fe3Ni1)81Nb7B12 alloy was irradiated by electron beams of doses up to 4 MGy.Irradiation had an influence on the magnetic microstructure studied alloys.It has manifested as a change in mean orientation local magnetization, intensity internal field, and distribution function induction field.All these parameters were determined from measured Mössbauer spectra.The magnetization most sensitive parameter.Structural changes not identified spectroscopy X-ray diffraction.The results...
The investigated oxide dispersion strengthened steels were received from laboratories involved in the Coordinated Research Project F11014 "Benchmarking of Structural Materials Pre-selected for Advanced Nuclear Reactors", namely India (IGCAR), Russia (Bochvar Institute), China (University Beijing), and Japan (Kyoto University).The application Mössbauer spectroscopy on these materials is aimed to reveal complex information about studied via unique characteristics as micromagnetic properties...
Metallic glass ribbons of composition Fe83(Sn/P)5B12 with or without 2% phosphorus substitution were irradiated a 5 MeV electron beam, and 4 MGy dose.We examined the effect irradiation on magnetic properties in amorphous sample, its result nanocrystallized sample.Both non-irradiated samples annealed at 400 • C for 1/2 h vacuum to obtain nanocrystalline phase.The P-containing ribbon is better terms softness but saturation induction reduced by 2.5%.Both materials show merely minute effects...
Meteorite fall was observed by the Košice town in Slovakia February 2010 and it classified as an ordinary chondrite H5. The samples were prepared powder form scratched from surface. Mossbauer spectra measured at room temperature liquid nitrogen temperature. Spectra consist of components related to iron-bearing phases with different content. Non-magnetic part fitted three quadrupole doublets. According its parameters, we identified olivine, pyroxene, traces Fe3+ phases. Magnetic consists...
Abstract Olivine basalts from southern Egypt were studied by 57 Fe Mössbauer spectroscopy at 297 and 77 K, optical microscopy X-ray diffraction. The spectra show three-magnetic sextets, three doublets of ferrous (Fe 2+ ), a weak ferric 3+ ) doublet that is attributable to nanophase oxide (npOx). magnetic sextets relate titanomagnetite the olivine, pyroxene, ulvöspinel. Variations in hyperfine parameters various components are attributed changes local crystal chemistry. intensity oxidation...