MnxCo3-xO4 spinel coatings: Controlled synthesis and high temperature oxidation resistance behavior |
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| Affiliation: | 1. Faculty of Applied Physics and Mathematics, Gdansk University of Technology, Poland;2. Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Poland;1. Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia;2. Department of Mechanical and Manufacturing Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia;1. Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al.Mickiewicza 30, 30-059 Krakow, Poland;2. Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, 4000 Roskilde, Denmark;1. Key Lab of Ship-Machinery Maintenance & Manufacture, Dalian Maritime University, Dalian 116026, China;2. School of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, China;1. Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino 10129, Italy;2. Institut de Recerca en Energia de Catalunya (IREC), Jardins de les Dones de Negre, 1, 2ª pl., Sant Adrià de Besòs, Barcelona 08930, Spain;3. Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, ul. G. Narutowicza 11/12, Gdańsk 80-233, Poland;4. AGH University of Science and Technology, al. Mickiewicza 30, Krakow 30-059, Poland;5. Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstr. 6, Erlangen 91058, Germany;1. ENEA C.R. Casaccia, 00123 Rome, Italy;2. School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;3. University of Tuscia – DAFNE, 01100 Viterbo, Italy |
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| Abstract: | A controllable method for the synthesis of MnxCo3-xO4 (x = 0.4, 0.8, 1.0, 1.2) spinel coatings with unique microstructures and high-temperature oxidation resistances for solid oxide fuel cells is crucially desired. Herein, we report the synthesis and analysis of synthesized coatings with different phase compositions of ferritic stainless steel interconnects. The coatings are fabricated using a sol-gel dip-coating method. Multiple experimental results confirm that the MnxCo3-xO4 coatings exhibit the advantages of having fine grains and uniform density. Furthermore, the as-prepared Mn1.2Co1.8O4 coating has a low coefficient of thermal expansion (11.98 × 10-6 K-1), matching that of ferritic stainless steel, which effectively improves the anti-stripping property of the materials. In particular, oxidation tests illustrate that the oxidation weight gain of this coating decreased by 84.4% compared with bare ferritic stainless steel after 3600 h. The area-specific resistance (ASR) results indicate that the ASR value of the Mn1.2Co1.8O4-coated sample reduced by about 70% compared with those of the ferritic stainless steel samples, which demonstrates its desirable high-temperature oxidation resistance property. It is hoped that this work stimulates new research ideas for the development of spinel oxide coating. |
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| Keywords: | Solid oxide fuel cell Interconnect Controllable phase composition Oxidation resistance |
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