화학공학소재연구정보센터
International Journal of Hydrogen Energy, Vol.40, No.26, 8407-8418, 2015
Laser machining of LaNi0.6M0.4O3_(delta) (M: Co, Fe) dip-coated on a Fe-22Cr mesh material to obtain a new contact coating for SOFC: Interaction between Crofer22APU interconnect and La0.6Sr0.4FeO3 cathode
A Fe-22Cr mesh was dipped into a ceramic (LaNi0.6M0.4O3-delta; M: Co, Fe) slurry to form a metallic/ceramic material as contact coating for solid oxide fuel cells (SOFCs). This composite was directly adhered to a Crofer22APU channeled interconnect and micro-holes were performed on coating using a femtosecond laser. Then, La0.6Sr0.4FeO3 (LSF) cathode was spray deposited on top of this ablated system to analyze the formed structures in terms of the electrical performance, processing reproducibility and long-term behavior at 800 degrees C. The adequate reproducibility of the process was confirmed through area specific resistance (ASR) testing on four replicas for each system. After long-term treatment, the chromium diffusion within both the interconnect and mesh of the composite was quantitatively analyzed using energy dispersive X-ray spectroscopy (EDX). The laser irradiated composite showed short-range damage, which was limited to the formation of iron and chromium oxides due to the evaporation and oxidation of the mesh. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.