Application potential of oxide coatings made of spinels
Authors: Dr. Susan Conze, Dr.-Ing. Lutz-Michael Berger, Dr.-Ing. Christoph Vorkötter, Dr. Tobias Kalfhaus, Prof. Dr. Robert Vaßen
DOI: https://doi.org/10.53192/TSB20220142
Oxide coatings made of spinels can be used in more applications than currently known. For such an extension of applications alternative compositions of the whole MgO-Al2O3 system and FeAl2O4 were explored using sintered ceramic bodies. On this base a selection of promising compositions for the preparation of experimental feedstock powders was made. Due to the higher stability of spinel in the MgO-Al2O3 system experimental feedstock powders with different stoichiometry were prepared and investigated together with commercially available compositions. After spray parameter optimization using atmospheric plasma spraying (APS) the coating microstructures and phase compositions as well as the coating properties were systematically studied. Hardness, sliding wear resistance, dielectric breakdown strength and corrosion resistance against H2SO4 are presented in this contribution.
Pages: 42 - 50
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