In-situ Experiments

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OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisIn-situ experimentsby Nuclear Forward ScatteringV. Procházka, V. VrbaFinancováno z projektu: IGA PrF 2014017V. Procházka, V. VrbaIn-situ experiments

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisOutline1Introduction2In-situ observation of chemical reactions3In-situ crystallization of amorphous metals4Data analysisV. Vrba, V. ProcházkaIn-situ experiments

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisOutline1Introduction2In-situ observation of chemical reactions3In-situ crystallization of amorphous metals4Data analysisV. Vrba, V. ProcházkaIn-situ experiments

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisPalacky University in Olomouc, Czech Republic(Vrba, Procházka)Slovak Technical University in Bratislava(Miglierini)V. Vrba, V. ProcházkaIn-situ experiments

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisOutline1Introduction2In-situ observation of chemical reactions3In-situ crystallization of amorphous metals4Data analysisV. Vrba, V. ProcházkaIn-situ experiments

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisHigh valence (VI) iron decompositionCleaning of contaminated water and waste waterFind mechanism of the decompositionObservation of possible intermediate state57Fe to 75% enriched powder of K2 FeVI O4sample holder - capillaryT 200 C, 220 C, 235 C and 250 CCharacteristic time of decomposition is tens ofminutesTime NFS spectrum accumulation - 1 min.P01, DESY, HamburgV. Vrba, V. ProcházkaIn-situ experiments

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisResults, isothermal decomposition at 235 Camplitude (a.u.)20 min.V. Vrba, V. Procházka70 min.140 min.18016014012010080604020140 min.104(b)70 min.20 min.103102101100204060In-situ experiments80 100 120 140 160time (ns)amplitude (a.u.)AnalysisBulding physical model(spectral components)Fitting of HyperfineparametersCONUSSannealing time (min)Precursor paramagneticProduct magnetic(a)

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysis1.1W1 WIII0.90.80.70.60.50.40.30.20.104080 120 160 200annealing time (min.)V. Vrba, V. ProcházkaWIIIWIVWV0.10.080.060.040.0204080 120 160 200annealing time (min.)In-situ experimentsamount of component III, IV, Vamount of component I and IIResults,isothermal process, T 235 C

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisOutline1Introduction2In-situ observation of chemical reactions3In-situ crystallization of amorphous metals4Data analysisV. Vrba, V. ProcházkaIn-situ experiments

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisAmorphous metals crystallizationAmorphous metals (metalic glasses), composition Fe90 Zr7 B3Interesting magnetic propertiesIts properties are determined by microstructural orderingPreparation - fast wheel quenching, disorder of melting iffrozenIncreased temperature caused growing of small grains in theamorphous matterV. Vrba, V. ProcházkaIn-situ experiments

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisCrystallizationID18, GrenobleIsothermal heatingNFS data were accumulated during 1 min.Analysis5E3120 min(a)120 min(b)log10 amplitude (a.u.)annealing time (min)1201008040 min6040 min402015 min15 min2E37E23E27E13E17E03E01E0020406080100 120 140 160time (ns)V. Vrba, V. Procházka20406080100 120 140 160time (ns)In-situ experiments

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisResults of NFS experimentshyperfine field (T)Three different areas were identifiedAmorphous, crystal grains and grains interface28crystalline2624interface(a)22relative face0.00153045607590 105 120 135time of annealing (min)V. Vrba, V. ProcházkaIn-situ experiments

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisOutline1Introduction2In-situ observation of chemical reactions3In-situ crystallization of amorphous metals4Data analysisV. Vrba, V. ProcházkaIn-situ experiments

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisSequential fitting procedureCONUSSIn-situ experiments contain around 100interferograms.Neighbors differ only slightly.Fitted parameters of N-th interferogram are inputvalues for N 1-th interferogramSequence of fitting is neededHUBERT - interface software for CONUSSV. Vrba, V. ProcházkaIn-situ experiments

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisHUBERT - interface software for CONUSSInterface software - CONUSS run behindTransform data from .fio (Hamburg) and .mca(Grenoble) format to 3column structureRun CONUSS,Sequential fitting procedureWritten in QtCreatorUsing "gnuplot"as a plotting toolIt is FREE and offerd for anyonee-mail: v.prochazka@upol.cz,willywillow@seznam.czV. Vrba, V. ProcházkaIn-situ experiments

OutlineIntroductionIn-situ observation of chemical reactionsIn-situ crystallization of amorphous metalsData analysisHUBERT - interface software for CONUSSV. Vrba, V. ProcházkaIn-situ experiments

In-situ observation of chemical reactions In-situ crystallization of amorphous metals Data analysis Outline 1 Introduction 2 In-situ observation of chemical reactions 3 In-situ crystallization of amorphous metals 4 Data analysis V

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