Physicochemical properties of the Crofer 22 APU steel with La0.6Sr0.4Co0.2Fe0.8O3-δ protective-conductive coatings prepared by pulsed laser deposition
| Autor: | Durda Ewa, Kruk Andrzej |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Processing and Application of Ceramics, Vol 17, Iss 3, Pp 301-313 (2023) |
| Druh dokumentu: | article |
| ISSN: | 1820-6131 2406-1034 |
| DOI: | 10.2298/PAC2303301D |
| Popis: | Commercial La0.6Sr0.4Co0.2Fe0.8O3-δ powder was used for preparation of corresponding perovskite films on commercial Crofer 22 APU high chromium steel by pulsed laser deposition. The obtained films PLD1 and PLD2 with a thickness of 1.1 and 0.35 μm, respectively, were dense and homogeneous, with good adhesion to the polished surface. Oxidation studies of the samples were carried out in air at 800°C for 200h. The calculated parabolic rate constant kp after isothermal oxidation for the PLD1 sample was 4.10 × 10−14 g2cm−4s−1 and was approximately four times lower than the oxidation rate determined for the PLD2 sample. As a result of the oxidation process, in both cases, a thin oxide layer of chromia and Mn1.5Cr1.5O4 spinel was formed on the steel/film interface. In addition, small amounts of manganese-chromium spinel crystals were observed on the films’ surfaces. Values of the specific electrical resistance at 800 °C after 100 h of the experiment were 0.06 and 0.038W•cm2 for PLD1 and PLD2, respectively. The results indicate that the applied coatings meet the criteria set upon protective-conductive layers for interconnect materials, for the IT-SOFCs (intermediate-temperature solid oxide fuel cells) applications. |
| Databáze: | Directory of Open Access Journals |
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