High temperature oxidation tests for the high velocity solution precursor flame sprayed manganese–cobalt oxide spinel protective coatings on SOFC interconnector steel. (18th May 2015)

• Record Type: Journal Article
• Authors: Puranen, Jouni; Laakso, Jarmo; Honkanen, Mari; Heinonen, Saara; Kylmälahti, Mikko; Lugowski, Stan; Coyle, Thomas W.; Kesler, Olivera; Vuoristo, Petri
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 18(2015)
• Page Start: 6216
• Page End: 6227
• Publication Date: 2015-05-18
• Subjects: Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.02.129
• Languages: English
• ISSNs: 0360-3199

Abstract

<abstract xml:lang="en" abstract-type="author" id="abs0010"> <title id="sectitle0010">Abstract</title> <sec> <p id="abspara0010">High velocity solution precursor flame spray process was used to deposit MnCo_1.9Fe_0.1O₄ and Mn_1.5Co_1.5O₄ coatings on Crofer 22 APU ferritic stainless steel samples. The solution precursors were manufactured by diluting metal nitrates into deionized water. The as-sprayed coatings were oxidized at 850 °C for 500 h to evaluate Cr-barrier and electrical properties.</p> <p id="abspara0015">The post-mortem studies were performed with various qualitative and quantitative elemental analysis methods and a four-point measurement was used for the area specific resistance studies. The as-sprayed coatings were formed of single crystallite nanoparticles (10–20 nm) and polycrystalline sub-micron particles (100–500 nm). The small particle and crystallite size showed strong sintering behavior during the oxidation cycle. Cr-migration was fully prevented thought the oxidized coatings. The surface topography and grain growth dominated the electrical properties during the test cycle.</p> </sec> </abstract>