Electrophoretic deposition of MnCr2O4 coating for solid oxide fuel cell metallic interconnects

Document Type: Research Paper

10.22104/ijhfc.2014.16

Abstract

In the present study, Mn - Cr spinel powder was synthesized through a solid state reaction. In the next step, the electrophoretic deposition (EPD) method was used to apply the MnCr2O4 spinel, as an oxidation-resistant layer, on SUS 430 stainless steel in a potential of 300 V/cm. The coated and uncoated samples were then pre-sintered in air at 900 °C for 3 h followed by cyclic oxidation at 800 °C for 500 h. In order to study the effect of reducing pre-sintering atmosphere on oxidation resistance, the coated specimen was pre-sintered in 5% H2 / Ar at 900 °C for 3 h followed by cyclic oxidation at 800 °C for 500 h. The investigation of the oxidation resistance of the samples revealed that the MnCr2O4 spinel coating improved the oxidation resistance of the uncoated sample and also, the oxidation rate constant (Kp) for pre-sintered coating in 5% H2 / Ar was nearly 14 times smaller than that of the one pre-sintered in air.

Keywords


[1] Fontana S, Amendola R, Chevalier S, Piccardo P, Caboche G, Viviani M, et al. Metallic interconnects for SOFC: Characterisation of corrosion resistance and conductivity evaluation at operating temperature of differently coated alloys. Journal of Power Sources. 2007; 171(2): 652-62.

[2] Zhu WZ, Deevi SC. Opportunity of metallic interconnects for solid oxide fuel cells: a status on contact resistance. Materials Research Bulletin. 2003; 38(6): 957-72.

[3] Zhu WZ, Deevi SC. Development of interconnect materials for solid oxide fuel cells. Materials Science and Engineering: A. 2003; 348(1–2): 227-43.

[4] Brylewski T, Nanko M, Maruyama T, Przybylski K. Application of Fe–16Cr ferritic alloy to interconnector for a solid oxide fuel cell. Solid State Ionics. 2001, 143(2): 131-50.

[5] Yoo J, Woo S-K, Yu JH, Lee S, Park GW. La0.8Sr0.2MnO3 and (Mn1.5Co1.5)O4 double layer coated by electrophoretic deposition on Crofer22 APU for SOEC interconnect applications. International Journal of Hydrogen Energy, 2009, 34(3): 1542-7.

[6] Lai, K., et al. A quasi-two-dimensional electrochemistry modeling tool for planar solid oxide fuel cell stacks. Journal of Power Sources, 2011, 196 (6), 3204-3222.

[7] Yoon KJ, Cramer CN, Stevenson JW, Marina OA. Advanced ceramic interconnect material for solid oxide fuel cells: Electrical and thermal properties of calcium- and nickel-doped yttrium chromites. Journal of Power Sources. 2010, 195(22): 7587-93.

[8] Z. Yang, K.S. Weil, D.M. Paxton, J.W. Stevenson. J. Electrochem. Soc. 2003; 150: 1188

[9] Bateni MR, Wei P, Deng X, Petric A. Spinel coatings for UNS 430 stainless steel interconnects. Surface and Coatings Technology. 2007; 201(8): 4677-84.

[10] Hansson AN, Linderoth S, Mogensen M, Somers MAJ. Inter-diffusion between Co3O4 coatings and the oxide scale on Fe-22Cr. Journal of Alloys and Compounds. 2007; 433(1–2): 193-201.

[11] Wincewicz KC, Cooper JS. Taxonomies of SOFC material and manufacturing alternatives. Journal of Power Sources, 2005, 140(2): 280-96.

[12] Chen X, Hou PY, Jacobson CP, Visco SJ, De Jonghe LC. Protective coating on stainless steel interconnect for SOFCs: oxidation kinetics and electrical properties. Solid State Ionics. 2005, 176(5–6): 425-33.

[13] Shaigan N, Qu W, Ivey DG, Chen W. A review of recent progress in coatings, surface modifications and alloy developments for solid oxide fuel cell ferritic stainless steel interconnects. Journal of Power Sources. 2010, 195(6): 1529-42.

[14] Mikkelsen L, Chen M, Hendriksen PV, Persson A, Pryds N, Rodrigo K. Deposition of La0.8Sr0.2Cr0.97V0.03O3 and MnCr2O4 thin films on ferritic alloy for solid oxide fuel cell application. Surface and Coatings Technology. 2007, 202(4–7): 1262-6.

[15] Laxmidhar Besra, Meilin Liu. A review on fundamentals and applications of electrophoretic deposition (EPD). Progress in Materials Science, 2007, 52(1): 1-61.

[16] Hamaker HC. Formation of deposition by electrophoresis. Trans Farad Soc 1940; 36: 279–83.

[17] C. Wagner, Z. Phys. Chem. B21. 1933; 42.