Abstract
Chromium-containing stainless steel is a prospective material for use as an interconnect in solid oxide fuel cells (SOFCs). However, during operations at high temperatures, the growth of oxide scales on the stainless steel causes the deteriorated performance of the SOFC. In this study, deposition of La-Cr-O coatings on stainless steel was conducted by using magnetron sputtering process. By using sputtering process, La-Cr-O coating exhibited with amorphous structure in nature, however, after annealing treatment at 800℃ for 1 hour, the deposited coating with LaCrO3 structure was obtained. Dynamic oxidation of La-Cr-O coated stainless steel studied by using thermo-gravimetric analysis (TGA) and differential scanning calorimeter (DSC) confirms that the better oxidation resistance and electrical resistance of the La-Cr-O-coated stainless steel during isothermal heating process. This was attributed to the transformation of coating from amorphous to LaCrO3 perovskite structure, resulting in a better performance after heating up to 800℃.
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