FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2914332854> ?p ?o ?g. }

• W2914332854 abstract "Ferritic high temperature alloys are widely used as boiler tube and heat exchanger materials in coal, biomass and co-fired power plants. All technologies have in common that the applied materials are exposed to different temperatures, process pressures and reactive atmospheres that lead to a change of the material properties and a further degradation of the material. Material changes caused by aging in highly corrosive and toxic gases such as SO2 are mainly studied ex situ after the reaction is finished. The solid material is deposited in the atmosphere for a certain period of time, and material changes are then examined by various microscopic techniques such as optical microscopy (OM), electron microprobe analysis (EMPA), scanning electron microscopy (SEM and TEM) and X-ray diffraction (XRD). Nevertheless, extensive efforts were made to study material changes of high temperature alloys under oxidizing and reducing atmospheres by environmental scanning electron microscopy or in situ TEM techniques However, the possibilities of microscopic in situ techniques are very limited for the use of highly corrosive and toxic gases such as SO2. Since Sulfur induced corrosion at temperatures relevant for coal and biomass fired power plants, which is causing breakaway oxidation and sulfide precipitation at grain boundaries, is still of scientific interest, the current work focuses on the effect of SO2 in an initial stage of corrosion of ferritic alloys. For the analysis of early stages of combined oxidation and sulphidation processes of Fe-Cr model alloys the usage of a light furnace to conduct a rapid reactive annealing experiment is feasible. Previous studies presented distinct results of the influence of chromium on early high temperature corrosion by SO2 by this technique and subsequent classical metallographic analyses. However, it is still not possible to trace the corrosion mechanism in real time by conducting single aging experiments. The current work introduces two different approaches to study the initial stages of high temperature oxidation processes by applying above state of the art X-ray diffraction and spectroscopy methods. One part focuses on the real time observation of the formation of corrosion products such as oxides and sulfides by energy dispersive X-ray diffraction (EDXRD). The potential of this technique to study crystallization and growth processes of thin films in a reactive environment in real time was previously shown for different compound semiconductors. This approach was now applied to follow oxidation and sulphidation processes of ferritic model alloys in SO2 and SO2/H2O environments. The diffraction signals of the X-rays were detected during the corrosion process and the peak area and positions were analyzed as a function of time. This procedure enables monitoring external oxide growth and material loss in real time in an early stage of corrosion. The other part of the current work presents the possibilities of X-ray absorption near edge structure spectroscopy (XANES) to characterize oxide scales and their growth mechanisms. Precise phase identification and quantification of corrosion products in a multi-phase oxide/sulfide scale is a pre-requisite to understand diffusion paths of metal ions and gas components. It is a challenging task to distinguish structurally similar reaction products such as Fe3O4 and FeCr2O4 especially in thin films with texture effects by diffraction. To illustrate for example Cr-out diffusion of an alloy throughout an inner and external oxide scale the differentiation of Fe3O4 and FeCr2O4 is indispensable. XANES uses the photoionization effect at the metal absorption edge in an aging product and accesses by this structural and chemical information. The current work uses XANES at the Fe-K and Cr-K absorption edge to identify various aging products grown as thin layers on alloys after short time aging experiments. A reaction chamber for combining high temperature oxidation experiments with surface sensitive X-ray absorption near edge structure spectroscopy will be introduced and first results of XANES on scales at high temperatures will be presented." @default.
• W2914332854 created "2019-02-21" @default.
• W2914332854 creator A5084145099 @default.
• W2914332854 date "2018-01-01" @default.
• W2914332854 modified "2023-09-26" @default.
• W2914332854 title "Early stages of high temperature oxidation/sulfidation studied by synchrotron x-ray diffraction and spectroscopy" @default.
• W2914332854 hasPublicationYear "2018" @default.
• W2914332854 type Work @default.
• W2914332854 sameAs 2914332854 @default.
• W2914332854 citedByCount "0" @default.
• W2914332854 crossrefType "journal-article" @default.
• W2914332854 hasAuthorship W2914332854A5084145099 @default.
• W2914332854 hasConcept C127413603 @default.
• W2914332854 hasConcept C138411078 @default.
• W2914332854 hasConcept C159985019 @default.
• W2914332854 hasConcept C178790620 @default.
• W2914332854 hasConcept C185592680 @default.
• W2914332854 hasConcept C191897082 @default.
• W2914332854 hasConcept C192562407 @default.
• W2914332854 hasConcept C20625102 @default.
• W2914332854 hasConcept C26771246 @default.
• W2914332854 hasConcept C2778480967 @default.
• W2914332854 hasConcept C2781099003 @default.
• W2914332854 hasConcept C42360764 @default.
• W2914332854 hasConcept C47908070 @default.
• W2914332854 hasConcept C518881349 @default.
• W2914332854 hasConcept C77176794 @default.
• W2914332854 hasConcept C87976508 @default.
• W2914332854 hasConceptScore W2914332854C127413603 @default.
• W2914332854 hasConceptScore W2914332854C138411078 @default.
• W2914332854 hasConceptScore W2914332854C159985019 @default.
• W2914332854 hasConceptScore W2914332854C178790620 @default.
• W2914332854 hasConceptScore W2914332854C185592680 @default.
• W2914332854 hasConceptScore W2914332854C191897082 @default.
• W2914332854 hasConceptScore W2914332854C192562407 @default.
• W2914332854 hasConceptScore W2914332854C20625102 @default.
• W2914332854 hasConceptScore W2914332854C26771246 @default.
• W2914332854 hasConceptScore W2914332854C2778480967 @default.
• W2914332854 hasConceptScore W2914332854C2781099003 @default.
• W2914332854 hasConceptScore W2914332854C42360764 @default.
• W2914332854 hasConceptScore W2914332854C47908070 @default.
• W2914332854 hasConceptScore W2914332854C518881349 @default.
• W2914332854 hasConceptScore W2914332854C77176794 @default.
• W2914332854 hasConceptScore W2914332854C87976508 @default.
• W2914332854 hasLocation W29143328541 @default.
• W2914332854 hasOpenAccess W2914332854 @default.
• W2914332854 hasPrimaryLocation W29143328541 @default.
• W2914332854 hasRelatedWork W1976875082 @default.
• W2914332854 hasRelatedWork W1985251569 @default.
• W2914332854 hasRelatedWork W1985515678 @default.
• W2914332854 hasRelatedWork W1992999906 @default.
• W2914332854 hasRelatedWork W2020166277 @default.
• W2914332854 hasRelatedWork W2022200140 @default.
• W2914332854 hasRelatedWork W2076685236 @default.
• W2914332854 hasRelatedWork W2092937031 @default.
• W2914332854 hasRelatedWork W2093498996 @default.
• W2914332854 hasRelatedWork W2136954402 @default.
• W2914332854 hasRelatedWork W2139198378 @default.
• W2914332854 hasRelatedWork W2314712495 @default.
• W2914332854 hasRelatedWork W2317708510 @default.
• W2914332854 hasRelatedWork W2326494413 @default.
• W2914332854 hasRelatedWork W2982669713 @default.
• W2914332854 hasRelatedWork W3172497031 @default.
• W2914332854 hasRelatedWork W355336213 @default.
• W2914332854 hasRelatedWork W47977057 @default.
• W2914332854 hasRelatedWork W2256795167 @default.
• W2914332854 hasRelatedWork W2801270010 @default.
• W2914332854 isParatext "false" @default.
• W2914332854 isRetracted "false" @default.
• W2914332854 magId "2914332854" @default.
• W2914332854 workType "article" @default.