Studies on elements diffusion of Mn/Co coated ferritic stainless steel for solid oxide fuel cell interconnects application

Zhang, Hui; Wu, Junwei; Liu, Xingbo; Baker, Adam

doi:10.1016/j.ijhydene.2013.02.026

Cited by 46 publications

(22 citation statements)

References 39 publications

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“…Thus it could be considered that Cr elements form the outer layer surrounding the Mn clusters, which means that Mn atoms move faster than Cr atoms. The results are consistent with the study of Zhang et al [17], the diffusion coefficient of Mn is greater than that of Cr, D Mn N D Cr (the element Cr is one order of magnitude slower than Mn). After Cr and Mn gather near Fe 3 C, they will replace Fe atoms to alloy cementites (Fe,Cr) 3 C and (Fe,Mn) 3 C in the manner of the in-situ nucleation.…”

Section: Resultssupporting

confidence: 92%

Influence of thermo-mechanical embrittlement processing on microstructure and mechanical behavior of a pressure vessel steel

Bai

Liaw

2016

Materials & Design

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Section: Resultssupporting

confidence: 92%

Influence of thermo-mechanical embrittlement processing on microstructure and mechanical behavior of a pressure vessel steel

Bai

Liaw

2016

Materials & Design

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“…Previous studies show that composition, concentration, and thickness of alloy coating all affect oxidation products besides oxidation temperature and time [13,18]. Element diffusion at high temperature will lead to element Fe and Cr from 430 SS substrate into oxide coating.…”

Section: Discussionmentioning

confidence: 99%

“…Partial Cu-Mn-O phase diagram [17] exhibits that it is a very narrow spinel stability region for the Cu x Mn 3−x O 4 spinel phase (x = 0.9-1.6), and the value of N cu for mono-spinel should be less than 1.3 Previous studies show that composition, concentration, and thickness of alloy coating all affect oxidation products besides oxidation temperature and time [13,18]. Element diffusion at high temperature will lead to element Fe and Cr from 430 SS substrate into oxide coating.…”

Section: Discussionmentioning

confidence: 99%

Thermal Growth Cu1.2Mn1.8O4 Spinel Coatings on Metal Interconnects for Solid Oxide Fuel Cell Applications

Guo

Lai

Shao

et al. 2017

Metals

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A novel cobalt-free Cu 1.2 Mn 1.8 O 4 spinel coating is prepared and evaluated for the metal interconnect of solid oxide fuel cell. Mn-35Cu and Co-35Mn alloy coatings are deposited on 430 SS substrate and then in-situ oxidized in air at 750 • C for 100 h. XRD results confirm that Cu 1.2 Mn 1.8 O 4 spinel with some Mn 2 O 3 is formed, and the average thickness of the coating is 70-80 µm according to cross section image. Spinel oxide coating is compact and has good adherence to the substrate, and very low Cr and Fe contents are detected in the coating. A small area specific resistance of 8.7 mΩ cm 2 is achieved at 800 • C for the composited Cu 1.2 Mn 1.8 O 4 spinel coating, which is much less than that of the composited (Co,Mn) 3 O 4 spinel coating. The research indicates that the Cu 1.2 Mn 1.8 O 4 coating evolved by the high-energy micro-arc alloying process is a promising coating material for the metallic interconnects.

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“…Moreover, a higher Mn-content in steels leads to lower Cr evaporation owing to the build-up of a thicker MnCrO spinel layer on top [5]. This lead to the development of a Co-Mn-based spinel coating which demonstrates many advantages: low ASR, Cr retention, reduction in oxidation rate and good thermal stability [8] [9][17] [18].…”

Section: Introductionmentioning

confidence: 99%

In-Situ Observation of Co-Ce Coated Metallic Interconnect Oxidation Combined with High-Resolution Post Exposure Analysis

et al. 2017

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Oxidation of Sanergy SSHT steel with Ce-Co coating, used as interconnect material, was observed in-situ in a modified environmental scanning electron microscope (ESEM) at nominal temperature between 800°C and 900°C under 33Pa of oxygen, for different durations (up to 60h). After these in-situ observations, lamellas of the observed target areas were prepared using a focused ion beam (FIB). This allowed the evaluation in the cross section of the final composition of the oxidation layers of the steel by scanning transmission electron microscopy (STEM) and energy dispersive x-ray analysis (EDX), of the same zone observed directly on the surface by ESEM. Results show the diffusion of manganese and iron towards the cobalt coating. Underneath, chromia scale forms. Under the applied conditions, the very thin cerium layer does not prevent the diffusion of other elements from the steel. Niobium (with silicium) and titanium form oxidized precipitates in the steel just below the chromia scale.

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Studies on elements diffusion of Mn/Co coated ferritic stainless steel for solid oxide fuel cell interconnects application

Cited by 46 publications

References 39 publications

Influence of thermo-mechanical embrittlement processing on microstructure and mechanical behavior of a pressure vessel steel

Influence of thermo-mechanical embrittlement processing on microstructure and mechanical behavior of a pressure vessel steel

Thermal Growth Cu1.2Mn1.8O4 Spinel Coatings on Metal Interconnects for Solid Oxide Fuel Cell Applications

In-Situ Observation of Co-Ce Coated Metallic Interconnect Oxidation Combined with High-Resolution Post Exposure Analysis

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