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A Novel Thermomechanical Processing Route to Fabricate ODS Ferritic Stainless Steel Interconnects and Their Oxidation Behavior
Ajay Kumar,
Published in Springer New York LLC
2019
Volume: 91
   
Issue: 5-6
Pages: 609 - 624
Abstract
Abstract: Oxide dispersion-strengthened AISI 430 alloy was fabricated using a novel thermomechanical processing route for potential application as interconnect in solid oxide fuel cells. The process can be termed as reverse friction deposition wherein the final product is formed by curling up as a seamless tube on the surface of the parent rod which is used as a consumable tool in a friction stir welding machine. The oxide dispersion alloy is obtained by incorporating 8 mol% yttria-stabilized zirconia powder in drilled holes in the rod. The number and spatial distribution of holes were optimized for a sound product and uniform distribution of the particles. The oxidation behavior of the formed tube was remarkably different from that of the parent rod. The dispersion of zirconia particles on the outer surface of the tube retards Cr diffusion owing to their grain boundary pinning effect which also refines the Fe 2 O 3 crystal size. (Cr, Mn)O 4 spinel, which is known to be electrically conductive, formed in the inner surface of the tube. The tube thus can be used as an interconnect in tubular solid oxide fuel cells and potentially prevent Cr poisoning of the cathode. Graphical Abstract: [Figure not available: see fulltext.]. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.
About the journal
JournalData powered by TypesetOxidation of Metals
PublisherData powered by TypesetSpringer New York LLC
ISSN0030770X
Open AccessNo
Concepts (28)
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    Chromium
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    Chromium compounds
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    Deposition
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    Dispersions
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    Fabrication
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    FERRITIC STAINLESS STEEL
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    Friction
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    Friction stir welding
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    Grain boundaries
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    Hematite
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    Manganese compounds
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    Oxidation
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    Plastic flow
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    Stainless steel
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    Tubes (components)
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    WELDING RODS
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    Yttria stabilized zirconia
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    YTTRIUM OXIDE
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    Zirconia
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    Electrically conductive
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    FERRITIC STAINLESS STEEL
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    Interconnect
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    ODS ALLOYS
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    OXIDE DISPERSION STRENGTHENED
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    Thermo-mechanical processing
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    TUBULAR SOLID OXIDE FUEL CELLS
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    YTTRIA STABILIZED ZIRCONIA POWDERS
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    Solid oxide fuel cells (sofc)