Metallic interconnects for SOFC: Characterisation of corrosion resistance and conductivity evaluation at operating temperature of differently coated alloys

Fontana, Sébastien; Amendola, Roberta; Chevalier, Sébastien; Piccardo, Paolo; Caboche, Gilles; Viviani, Massimo; Molins, Régine; Sennour, Mohamed

doi:10.1016/j.jpowsour.2007.06.255

Cited by 232 publications

(129 citation statements)

References 47 publications

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“…9,17,18 The key requirements for a protective coating include dense structure, high electronic conductivity, thermal, mechanical and chemical compatibility with the adjacent components and low diffusion coefficients of Cr and O. Among coating mate-rials, such as reactive element oxides, 11,[19][20][21][22][23][24] 72,73 Although the feasibility of these techniques has been substantiated, individual processes exhibit their characteristic drawbacks along with their advantages. For example, electroplating is suitable for uniformly applying thin film over a complex configuration, but the large negative reduction potential of manganese makes the control of the spinel composition extremely difficult.…”

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confidence: 99%

Highly Dense Mn-Co Spinel Coating for Protection of Metallic Interconnect of Solid Oxide Fuel Cells

Lee

Hong

Kim

et al. 2014

J. Electrochem. Soc.

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The major degradation issues of solid oxide fuel cells (SOFC) are associated with the oxide scale growth and Cr evaporation of the metallic interconnect. To address these challenges, a highly dense spinel oxide coating was fabricated on a ferritic stainless steel interconnect using a cost-competitive ceramic processing route. The nano-scale Mn 1.5 Co 1.5 O 4 spinel powder was synthesized using a glycine-nitrate method, and the particle agglomerates were effectively disintegrated by a high-energy attrition milling process. The spinel protective coating, which was applied by screen printing, was sintered to a nearly full density, without causing damage to the metallic substrate, by a high-temperature annealing process in a reducing environment, followed by re-oxidation at a moderate temperature. The dense spinel coating remarkably reduced the growth rate of chromia scale and restrained the evaporation of chromium species, as verified by area specific resistance (ASR) measurements and analysis on chromium distribution over the cross-section. Strong adhesion between the coating and substrate was confirmed after 500-hour operation. The sintering mechanism involved in reduction-oxidation heat-treatment was studied based on dilatometry measurements and microstructural features. The implication of the ASR change and the chromium migration for stability of practical SOFC stacks was discussed in detail.

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confidence: 99%

Highly Dense Mn-Co Spinel Coating for Protection of Metallic Interconnect of Solid Oxide Fuel Cells

Lee

Hong

Kim

et al. 2014

J. Electrochem. Soc.

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“…Today, one of the most common used material for interconnects in solid oxide fuel cells (SOFC) is chromite ferrite steels of the Crofer type containing 0.03% C, 20-24% Cr, 0.3-0.8% Mn, 0.1-0.6% Si, up to 0.2% Ti, up to 0.2% La, up to 0.1% Al. These materials have high electrical and thermal conductivity, a satisfactory heat resistance and a coefficient of thermal expansion close to the electrolyte [23]. Their main disadvantage is the tendency to form volatile compounds CrO 3 and CrO 2 (OH) 2 , which predetermine "cathode pollution", and therefore, reduce the productivity of the SOFC.…”

Section: Methodsmentioning

confidence: 99%

Presence of Oxygen in Ti-Al-C MAX Phases-Based Materials and their Stability in Oxidizing Environment at Elevated Temperatures

et al. 2018

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The Ti3AlC2-, (Ti,Nb)3AlC2-and Ti2AlC-based materials turned out to be more resistant than Crofer JDA steel in oxidizing atmosphere as 1000 h long tests at 600• C have shown. But the amounts of oxygen absorbed by the materials during testing were different. The Ti2AlC-based material demonstrated the lowest oxygen uptake, (Ti,Nb)3AlC2-based absorbed a somewhat higher amount and the highest amount was absorbed by Ti3AlC2-based material. Scanning electron microscopy and the Auger study witnessed that amounts of oxygen in the MAX phases before the exposure in air were as well different: the approximate stoichiometries of the matrix phases of materials were Ti3.1−3.2AlC2−2.2, Ti1.9−4Nb0.06−0.1AlC1.6−2.2O0.1−1.2 and Ti2.3−3.6AlC1−1.9O0.2−0.6, respectively. The higher amount of oxygen present in the MAX phase structures may be the reason for higher resistance to oxidation during long-term heating in air at elevated temperature. The studied materials demonstrated high stabilities in hydrogen atmosphere as well. The bending strength of the Ti3AlC2-and (Ti,Nb)3AlC2-based materials after keeping at 600• C in air and hydrogen increased by 10-15%, but the highest absolute value of bending strength before and after being kept in air and hydrogen demonstrated the Ti2AlC-based material (about 590 MPa).

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“…If the REE addition is too highthe negative effects are observed, like embrittlement increase and mechanical properties deterioration. REE can be incorporated into the surface area of materials using different methods of surface treatment: ion implantation [1,3,4], plasma immersion ion implantation [2], solgel coating [4,9], metal organic chemical vapour deposition [10][11][12][13], plasma beams application [2,5,14], pack cementation [3]. * corresponding author; e-mail: b.sartowska@ichtj.waw.pl…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of AISI 316L Steel Surface Layer Implanted with Rare Earth Element

et al. 2015

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Stainless steels with their very good corrosion resistance are used in nuclear, petrochemical, chemical, pulp and paper chemical industries as well as in food processing and others. Unfortunately, poor tribological properties of this kind of steel can be the limitation in the situations in which wear can be responsible for material degradation, like corrosion-erosion. Improvement of the wear resistance of austenitic stainless steels can be achieved using different methods of surface modification, for example: enrichment of the surface layer with reactive elements. Rare earth elements were implanted to AISI 316L austenitic stainless steel using the MEVVA type implanter (65 kV). Different rare earth elements implanted doses: 10 15 , 5×10 15 , and 5×10 16 ion/cm 2 were applied. Initial and modified surfaces were investigated using scanning electron microscopy, elemental analysis with the energy dispersive spectroscopy method, X-ray diffraction analysis and the Rutherford backscattered spectroscopy. Tribological properties were investigated using the Amsler method. The most important result was that the surface layers of AISI 316L steel implanted with rare earth elements showed improvement of tribological properties as compared with the initial material.

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Metallic interconnects for SOFC: Characterisation of corrosion resistance and conductivity evaluation at operating temperature of differently coated alloys

Cited by 232 publications

References 47 publications

Highly Dense Mn-Co Spinel Coating for Protection of Metallic Interconnect of Solid Oxide Fuel Cells

Highly Dense Mn-Co Spinel Coating for Protection of Metallic Interconnect of Solid Oxide Fuel Cells

Presence of Oxygen in Ti-Al-C MAX Phases-Based Materials and their Stability in Oxidizing Environment at Elevated Temperatures

Tribological Properties of AISI 316L Steel Surface Layer Implanted with Rare Earth Element

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