Improvement of Oxidation Resistance of Fe-Cr Ferritic Alloy Sheets for SOFC Interconnects

Yasuda, Nobutaka; Uehara, Tetsutaro; Okamoto, Masayuki; Aoki, Chuya; Ohno, Toshiyuki; Toji, Akihiro

doi:10.1149/1.3205677

Cited by 10 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The study also found that additions of Cu, from 0.94 wt% to 1.44 wt%, reduced Cr vaporization in alloys containing 0.30 wt% Mn and helped limit growth of the Mn spinel layer. 24 However, Sachitanand et al also studied ZMG 232 G10 steel with Cu additions using the denuder technique described below, but could not reproduce the beneficial effect of Cu on Cr vaporization. 19 Silicon wafer collector.-Another variant to the standard condensation method uses ion-beam analysis to measure the amount of Cr collected on Si wafers during an experiment.…”

Section: Vapor Collection and Analysis Techniquesmentioning

confidence: 99%

“…4,13 In order to gauge the effectiveness of a coating or steel it is necessary to measure the amount of Cr vapor released at SOFC operating temperatures, thus a branch of experimental techniques has emerged to quantify Cr vaporization. [21][22][23][24] The standard approach, known as the transpiration method, enables measurement of chromium vapors in the presence of high concentrations of other gases. 25 Recently, other collection techniques have arisen to avoid some of the challenges posed by the standard transpiration method.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Methods to Quantify Reactive Chromium Vaporization from Solid Oxide Fuel Cell Interconnects

Key

Eziashi

Froitzheim

et al. 2014

J. Electrochem. Soc.

View full text Add to dashboard Cite

High-temperature (>600 • C) reactive vaporization of Cr from chromia and stainless steels in oxidizing environments is an industrially relevant phenomenon that has been and will continue to be studied extensively for decades. Recently, many experimental techniques have been developed to measure Cr vaporization from stainless steel interconnect (IC) components within solid oxide fuel cell (SOFC) systems. Many of these techniques are based on an experimental method known as the transpiration method, which is used to generate Cr vapors and subsequently collect them for quantitative analysis. However, vapor collection and analysis methods differ significantly between investigators within the community, as does the array of alloys (with and without protective surface coatings), temperatures, flow rates, and water vapor pressures used in experimentation. Therefore, the purpose of the present work is to provide an overview of experimental techniques used to quantify reactive Cr vaporization, and to compare data reported in literature on Cr vaporization from Cr 2 O 3 and chromium containing alloys in oxidizing environments.

show abstract

Section: Vapor Collection and Analysis Techniquesmentioning

confidence: 99%

mentioning

confidence: 99%

Methods to Quantify Reactive Chromium Vaporization from Solid Oxide Fuel Cell Interconnects

Key

Eziashi

Froitzheim

et al. 2014

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…Reducing the number of cells increases the current per cell, so it became necessary to further improve the high temperature durability of the ferritic stainless steel material that connects the cells. The degradation modes of the stainless steel used SOFC primarily include the growth of an insulating oxide layer such as Cr2O3, Cr poisoning of the SOFC cathode, 6,7 and anomalous oxidation [8][9][10] due to a decrease in the Cr concentration in the stainless steel. Therefore, high heat resistant ceramic coating is indispensable for the SOFC interconnectors to suppress these degradations.…”

Section: Introductionmentioning

confidence: 99%

Interface Design Development for High Durability of SOFC Interconnectors Using Electrodeposition Coating

Nakao¹,

Saito²,

Nishimura³

et al. 2023

ECS Trans.

View full text Add to dashboard Cite

Solid Oxide fuel cell (SOFC) mounted in ENE-FARM type S has been commercialized since 2012. For further market expansion of ENE-FARM type, higher efficiency, higher durability, and lower cost of SOFC stacks are required. A key technology to advance its performance is a coating on SOFC metallic interconnector for the long-term durability of SOFC stacks. We achieved significant reduction in resistance and improved durability by improving the highly mass producible electrodeposition coating method. In this research, the coating technology of the SOFC interconnector has been developed. Long-term durability was confirmed through high-temperature acceleration evaluation, and the electrodeposition coating on the SOFC interconnector was installed in the ENE-FARM type S.

show abstract

“…Therefore the effect of thickness of sheet of ZMG232L on oxidation behavior was investigated (3). Furthermore, the effect of alloying elements and impurities on oxidation resistance of ZMG232L was investigated and oxidation resistance of thin sheet was able to be improved by reducing Mn, increasing Cr, and adding W in ZMG232L (4,5).…”

Section: Introductionmentioning

confidence: 99%

Development of New Alloys for SOFC Interconnects with Excellent Oxidation Resistance and Reduced Cr-Evaporation

Yasuda¹,

Uehara²,

Tanaka³

et al. 2011

ECS Trans.

View full text Add to dashboard Cite

Recently, metallic materials, especially Fe-Cr ferritic alloys (ex. ZMG232L), are promising as interconnect materials of solid oxide fuel cells (SOFCs) operated at around medium temperatures such as 700 - 850oC. As for these alloys, good oxidation resistance and good electrical conductivity in thin sheets are required. Moreover, it is needed to reduce Cr evaporation, which causes the degradation of the cell, from oxidized alloy surface. In this study, the effect of chemical compositions on required properties at elevated temperature was investigated and new alloys for SOFC Interconnects were developed.

show abstract

Improvement of Oxidation Resistance of Fe-Cr Ferritic Alloy Sheets for SOFC Interconnects

Cited by 10 publications

References 3 publications

Methods to Quantify Reactive Chromium Vaporization from Solid Oxide Fuel Cell Interconnects

Methods to Quantify Reactive Chromium Vaporization from Solid Oxide Fuel Cell Interconnects

Interface Design Development for High Durability of SOFC Interconnectors Using Electrodeposition Coating

Development of New Alloys for SOFC Interconnects with Excellent Oxidation Resistance and Reduced Cr-Evaporation

Contact Info

Product

Resources

About