Swaminathan, Srinivasan Ko, Yoon Seok Lee, Young-Su Kim, Dong-Ik 2024-01-20T00:02:41Z 2024-01-20T00:02:41Z 2021-09-03 2017-11-30 0378-7753 https://pubs.kist.re.kr/handle/201004/122031 Two Fe-22 wt% Cr ferritic stainless steels containing varying concentrations of La (0.14 or 0.52 wt%), Cu (0.17 or 1.74 wt%) and B (48 or 109 ppm) are investigated with respect to oxidation behavior and high temperature area specific resistance (ASR) of the surface oxide scales. To determine the oxidation resistance of developed steels, continuous isothermal oxidation is carried out at 800 degrees C in air, for 2000 h, and their thermally grown oxide scale is characterized using dynamic SIMS, SEM/EDX, XRD and GI-XRD techniques. To assess their electrical performance, the ASR measurement by four-point probe method is conducted at 800 degrees C in air, for 400 h. In higher La content steel, the La-oxides at the scale/alloy interface promotes the oxygen transport which resulted in sub-surface oxidation of Mn, Cr, Ti and Al. Moreover, the inward growth of oxides contributes to increase of Fe-Cr alloy protrusions within the scale, which reduced the ASR. In contrast, sub-surface oxidation is reduced in high Cu-alloyed steel by segregated Cu at the scale/alloy interface. Thus, addition of Cu is effective to oxidation resistance and also to better electrical performance. However, no obvious impact of B on the scale sequence and/or ASR is observed. (C) 2017 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV HIGH-TEMPERATURE OXIDATION CROFER 22 APU STAINLESS-STEEL METALLIC INTERCONNECTS STAGE OXIDATION CHROMIA SCALE EVOLUTION DIFFUSION IRON DEPOSITION Oxidation behavior and area specific resistance of La, Cu and B alloyed Fe-22Cr ferritic steels for solid oxide fuel cell interconnects Article 10.1016/j.jpowsour.2017.09.077 1 JOURNAL OF POWER SOURCES, v.369, pp.13 - 26 JOURNAL OF POWER SOURCES 369 13 26 scie scopus 000413799900003 2-s2.0-85030460573 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article HIGH-TEMPERATURE OXIDATION CROFER 22 APU STAINLESS-STEEL METALLIC INTERCONNECTS STAGE OXIDATION CHROMIA SCALE EVOLUTION DIFFUSION IRON DEPOSITION Solid oxide fuel cell interconnects Area specific resistance High temperature oxidation Lanthanum Copper Boron