0000000000247737

AUTHOR

N.p. Barradas

showing 3 related works from this author

A study of solar thermal absorber stack based on CrAlSiNx/CrAlSiNxOy structure by ion beams

2019

Renewable energies are foreseen as a major energy resource for next generations. Among several energy sources and technologies available, Concentrated Solar Power (CSP) technology has a great potential, but it needs to be optimised, in particular to reduce the costs, with an increase of the operating temperature and long term stability. This goal can be achieved by tailoring the composition and multilayer structure of films. In this work we present and discuss the results obtained from solar absorber coatings based on nitride/oxynitride structures. A four-layer film structure, W/CrAlSiNx(HA)/CrAlSiNxOy(LA)/SiAlOx, was deposited on stainless steel substrates using magnetron sputtering deposi…

Nuclear and High Energy PhysicsMaterials scienceCrAlSiNx /CrAlSiNxOy02 engineering and technologyaurinkoenergia010402 general chemistry01 natural sciences7. Clean energyRutherford Backscattering Spectrometry (RBS)time of flight elastic recoil detection analysis (TOF-ERDA)Operating temperatureSputteringConcentrated solar power:Engenharia dos Materiais [Engenharia e Tecnologia]Thermal stabilityCrAlSiN /CrAlSiN O x x yInstrumentationpinnoitteetTime of flight Elastic Recoil Detection Analysis (TOF-ERDA)CrAlSiNx/CrAlSiNxOyScience & TechnologySolar selective absorberbusiness.industrySputteringSolar selective absorber ; Rutherford Backscattering Spectrometry (RBS) ; Time of flight Elastic Recoil Detection Analysis (TOF-ERDA) ; CrAlSiNx/CrAlSiNxOySputteringSputter deposition021001 nanoscience & nanotechnologyRutherford backscattering spectrometry0104 chemical sciencesElastic recoil detectionsolar selective absorberspektrometriaEngenharia e Tecnologia::Engenharia dos MateriaisOptoelectronicssputteringohutkalvot0210 nano-technologybusinessEnergy source
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New experimental molecular stopping cross section data of Al2O3, for heavy ions

2014

Abstract Molecular stopping cross section data of Al2O3, for heavy ions of 12C, 16O, 28Si, 35Cl, 79Br within the energy range of 0.01–1.0 MeV/nucleon were measured. Both direct transmission and bulk analysis methods were applied. Stopping cross sections were calculated both with the SRIM and MSTAR codes. Evaluation and intercomparison of the new data with the calculated and previously measured ones are reported in this paper.

Nuclear and High Energy PhysicsRange (particle radiation)ta114ChemistryHadronCarbon-12Stopping cross section ; Stopping power ; ERDA ; Heavy ion IBA ; Light element analysisCharged particleIonNuclear physicsBaryonStopping power (particle radiation)NucleonInstrumentation
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Determination of molecular stopping cross section of 12C, 16O, 28Si, 35Cl, 58Ni, 79Br, and 127I in silicon nitride

2015

Abstract Silicon nitride is a technologically important material in a range of applications due to a combination of important properties. Ion beam analysis techniques, and in particular, heavy ion elastic recoil detection analysis can be used to determine the stoichiometry of silicon nitride films, which often deviates from the ideal Si3N4, as well as the content of impurities such as hydrogen, even in the presence of other materials or in a matrix containing heavier elements. Accurate quantification of IBA results depends on the basic data used in the data analysis. Quantitative depth profiling relies on the knowledge of the stopping power cross sections of the materials studied for the io…

Silicon nitrideNuclear and High Energy PhysicsIon beam analysisMaterials scienceta114HydrogenIon beam analysischemistry.chemical_elementHeavy ionsIonElastic recoil detectionchemistry.chemical_compoundchemistrySilicon nitrideImpurityThin filmAtomic physicsStopping powerInstrumentationStoichiometryNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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