A5014548485- High-Temperature Coating Behaviors
- Advancements in Solid Oxide Fuel Cells
- Nuclear Materials and Properties
- Corrosion Behavior and Inhibition
- Metallurgical Processes and Thermodynamics
- Electronic and Structural Properties of Oxides
- Magnesium Alloys: Properties and Applications
- Hydrogen embrittlement and corrosion behaviors in metals
- Semiconductor materials and devices
- Aluminum Alloys Composites Properties
- Fuel Cells and Related Materials
- Metal and Thin Film Mechanics
- Catalytic Processes in Materials Science
- Aluminum Alloy Microstructure Properties
- Conservation Techniques and Studies
- Advanced materials and composites
- Intermetallics and Advanced Alloy Properties
- Building materials and conservation
- Advanced ceramic materials synthesis
- Magnesium Oxide Properties and Applications
- Metal Alloys Wear and Properties
- Copper Interconnects and Reliability
- Advanced Welding Techniques Analysis
- Concrete Corrosion and Durability
- Electrocatalysts for Energy Conversion
Chalmers University of Technology
2015-2024
École Nationale Supérieure des Ingénieurs en Arts Chimiques et Technologiques
2023
Swedish e-Science Research Centre
2012
University of Gothenburg
1998-2008
Institute of Inorganic Chemistry of the Slovak Academy of Sciences
2006
Max-Planck-Institut für Nachhaltige Materialien
2006
Trelleborg (Sweden)
2006
There remains growing interest in magnesium (Mg) and its alloys, as they are the lightest structural metallic materials. Mg alloys have potential to enable design of lighter engineered systems, including positive implications for reduced energy consumption. Furthermore, also emerging viable biodegradable materials battery electrodes. In spite greatest historical usage at present, wider use restricted by a number inherent limitations, vulnerability corrosion, poor formability low creep...
In recent years, a number of ferritic interconnect materials for use in solid oxide fuel cells (SOFC) have been developed and are now commercially available. Although similar, there substantial variations minor alloying elements. This study compares the oxidation performance five such materials: Crofer 22 H, APU (ThyssenKrupp VDM), Sanergy HT (Sandvik Materials Technology), ZMG232 G10 (Hitachi Metals) E-Brite (ATI Allegheny Ludlum). 1000 h exposures carried out tubular furnaces at 850 °C,...
The effect of temperature on the NaCl-induced atmospheric corrosion Mg–Al alloy AM50 has been investigated in laboratory. corroded samples were analyzed gravimetrically and by SEM, EDX, XRD, FTIR. 99.97% Mg was also studied for reference. While is strongly reduced with decreasing temperature, does not exhibit such a trend. dependence attributed to aluminum content alloy. Several crystalline magnesium hydroxy carbonates formed at 4 22 °C but absent −4 °C.
Reactive Element (RE) and RE/cobalt-coated stainless steel AISI 441 was exposed at Solid Oxide Fuel Cell (SOFC) cathode conditions (850 °C in air with 3% water content) for up to 500 h. The chromium evaporation measured by applying the denuder technique. Uncoated material exhibited severe spallation which could be successfully prevented using cerium or lanthanum coatings. By double layer coatings of combination cobalt oxidation rate decreased volatilisation also about 90% lower than uncoated...
The atmospheric corrosion of several Mg–Al alloys was investigated at − 4, 4 and 22 °C. rate increased with increasing temperature decreasing Al content. Also, the effect became stronger cast microstructure found to influence both average dependence corrosion. on is discussed in terms enriched layer bottom surface film breakdown same by chloride ions.
The present work investigates the low-cost steels AISI 441, 430, and 444 against tailor-made high Cr steel Crofer 22 APU (22.9 wt% Cr) at 800 °C in simulated solid oxide fuel cell (SOFC) cathode conditions. Furthermore, a low steel, 409 (11.4 is included study. oxidation, chromium evaporation, area-specific resistance (ASR) of uncoated Ce/Co-coated are studied for up to 3000 h. showed significant improvement behaviour compared their counterparts. oxidation evaporation between varied...
Ferritic stainless steel interconnects are used in solid oxide fuel cells; however, coatings required to improve their performance. Although several types of have been proposed, they scarcely investigated under similar conditions. This study compares the characteristics uncoated Crofer 22 APU and eight different on for up 3000 h at 800 °C. The were deposited various research laboratories around world, experiments performed Chalmers University Technology, Sweden. Cross-sections samples...
The oxidation of 304-type (Fe18Cr10Ni) austenitic stainless steel was investigated at 500 and 600 °C in 5% O2 + 40% H2O. Prior to exposure the samples were sprayed with KCl, K2CO3 or K2SO4, amount salt corresponding 1.35 μmol K+/cm2. For reference, salt-free exposed H2O (N2 used as carrier gas). oxidized analyzed SEM/EDX, XRD, IC FIB. KCl strongly accelerate corrosion 304L while K2SO4 has little influence on rate morphology corroded surface. react chromium-rich oxide sample surface, forming...
The influence of KCl, NaCl and CaCl2 on the oxidation 304-type (Fe18Cr10Ni) stainless steel at 600 °C in 5 %O2 + 40 %H2O was investigated. Prior to exposure, a small amount preferred salt (cation equivalent: 1.35 μmol/cm2) deposited samples. Exposure time 1–168 h. oxidized samples were analyzed by SEM/EDX, XRD, FIB IC. presence KCl strongly accelerates high temperature corrosion 304L. Corrosion attack is initiated formation alkali chromate through reaction with protective oxide. Chromate...
Chromium species volatilization, oxide scale growth, and electrical resistance were studied at 650 750 °C for thin metallic Co- Ce/Co-coated steels intended to be utilized as the interconnect material in Intermediate Temperature Solid Oxide Fuel Cells (IT-SOFC). Mass gain was recorded follow oxidation kinetics, chromium evaporation measured using denuder technique Area Specific Resistance (ASR) measurements carried out on 500 h pre-exposed samples. The microstructure of thermally grown...
For Intermediate-Temperature SOFC, the lower operating temperature allows for a broader range of steel grades to be used as interconnects. This work compares oxidation performances six Cr2O3-forming steels and one Al2O3-forming steel, under single- dual-atmosphere conditions. Single-atmosphere exposures in combination with Cr(VI) evaporation measurements were carried out at 600 °C. Except AISI 430 all showed protective behaviour similar values low area specific resistance (ASR) values....
A key component of a Solid Oxide Fuel Cell (SOFC) is the interconnect, which connects individual fuel cells in series to form cell stack. The interconnect exposed air and parallel; these so-called dual-atmosphere conditions cause severe corrosion on air-side. This work investigates coatings that can mitigate this effect. Physical Vapour Deposition (PVD) Cr2O3, CeO2, YSZ, Al2O3 ferritic stainless steel (AISI 441) were under for up 3000 h. evolution products was evaluated using optical...
The influence of ambient concentrations carbon dioxide on the NaCl-induced atmospheric corrosion high purity die-cast MgAl alloys (AM20 and AM60) MgAlZn alloy (AZ91) is reported. Samples were exposed four weeks in a carefully controlled synthetic atmosphere. Relative humidity was 95%, temperature concentration or 350 ppm. Sodium chloride added before exposures products analyzed by gravimetry, ion chromatography, X-ray diffraction, environmental scanning electron microscopy. Mass gain metal...
The effect of the addition chlorine and/or sulfur to fuel on fly ash composition, deposit formation, and superheater corrosion has been studied during biomass combustion in a circulating fluidized-bed boiler. (HCl (aq)) (SO2 (g)) were added proportions relevance for potassium chemistry. composition bottom ashes was analyzed. Gas particle measurements performed downstream cyclone before convection pass flue gas recorded stack with series standard instruments an FTIR analyzer. At position...