ISBN-13: 9783639149906 / Angielski / Miękka / 2009 / 148 str.
In the last decades, Solid Oxide Fuel Cells (SOFCs) gained an important place among the alternative energy production sources. This is due to SOFCs wide operation temperature range (600-1000 C) and to the possibility of using many types of fuels, including various hydrocarbons. The ferritic stainless steel interconnect is one of the main components of a SOFC stack. Interconnects require high electrical conductivity coatings with blocking properties against Cr transport from the steel substrate. This book provides a study of the oxides with spinel structure obtained by thermal oxidation of Mn-Co-Fe metallic thin films. The films were deposited by magnetron co-sputtering on ZMG232L (Hitachi Metals Ltd.(r)) ferritic stainless steel. The coatings' properties were studied as a function of annealing parameters (atmosphere, temperature and time). The most promising results to be used for stack applications were obtained for 1 m Mn-Co coatings deposited on pre-annealed ZMG232L. Low resistivity, no Cr diffusion and no undesired oxide phases were detected for these coatings. Based on the electrical properties, the estimated lifetime of SOFCs using these coated interconnects is 22000 h."
In the last decades, Solid Oxide Fuel Cells (SOFCs)gained an important place among the alternativeenergy production sources. This is due to SOFCs wideoperation temperature range (600-1000 °C) and to thepossibility of using many types of fuels, includingvarious hydrocarbons. The ferritic stainless steelinterconnect is one of the main components of a SOFCstack. Interconnects require high electricalconductivity coatings with blocking propertiesagainst Cr transport from the steel substrate. Thisbook provides a study of the oxides with spinelstructure obtained by thermal oxidation of Mn-Co-Femetallic thin films. The films were deposited bymagnetron co-sputtering on ZMG232L (Hitachi MetalsLtd.®) ferritic stainless steel. The coatingsproperties were studied as a function of annealingparameters (atmosphere, temperature and time). Themost promising results to be used for stackapplications were obtained for 1 μm Mn-Co coatingsdeposited on pre-annealed ZMG232L. Low resistivity,no Cr diffusion and no undesired oxide phases weredetected for these coatings. Based on the electricalproperties, the estimated lifetime of SOFCs usingthese coated interconnects is 22000 h.