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Coatings 2017, 7(12), 226; https://doi.org/10.3390/coatings7120226

Plasma-Sprayed LSM Protective Coating on Metallic Interconnect of SOFC

1
Institute of Materials Science and Engineering, National Taipei University of Technology, Taipei 106, Taiwan
2
Dental Department, Mackay Memorial Hospital, Taipei 106, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Morteza Eslamian
Received: 3 November 2017 / Revised: 30 November 2017 / Accepted: 9 December 2017 / Published: 11 December 2017
View Full-Text   |   Download PDF [24128 KB, uploaded 11 December 2017]   |  

Abstract

In this study, a (La0.8Sr0.2)0.98MnO3 protective layer was prepared on the C276, Crofer22 APU, SUS304, and SUS430 alloys by the atmospheric plasma spraying technique (APS). The oxidation behavior and electrical property of these metal alloys have been investigated isothermally at 800 °C in air for up to 300 h. Results showed that the ferritic steels transform into MnCr2O4 spinels and a Cr2O3 layer during isothermal oxidation. The C276 alloy formed NiCr2O4 and FeCr2O4 layers; these are protective and act as an effective barrier against chromium migration into the outer oxide layer, and the alloy demonstrated good oxidation resistance and a reasonable match to the coefficient of thermal expansion of the substrate and a low-oxide scale area-specific resistance. The ASR effects on the formation of oxide scale have been investigated, and the ASR of coated samples was below 0.024 Ω·cm2. It has good electrical conductivity for SOFC in long-term use. View Full-Text
Keywords: solid oxide fuel cell; metallic interconnect; plasma spray solid oxide fuel cell; metallic interconnect; plasma spray
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Chen, J.-W.; Lin, K.-Y.; Yang, Y.-C.; Yeh, S.-T. Plasma-Sprayed LSM Protective Coating on Metallic Interconnect of SOFC. Coatings 2017, 7, 226.

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