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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Advances in Surface Engineering II
Presentation Title High Temperature Oxidation Behaviors of SiON Coated AISI 441 in Different Atmospheres
Author(s) Kathy Lu, Kaustubh Bawane, Rajendra Bordia
On-Site Speaker (Planned) Kathy Lu
Abstract Scope Silicon oxynitride (SiON) coated AISI 441 was prepared using pyrolysis of dip coated perhydropolysilazane (PHPS) precursor polymer. The high-temperature oxidation behaviors of SiON coated AISI 441 substrates were studied in Ar+O2, Ar+H2O, and Ar+CO2 atmospheres at 800°C for 100 hours. The SiON coated AISI substrates showed better performance in all three atmospheres as compared to the uncoated AISI 441 substrate. The result was attributed to the dense, crack free SiON coating which provided complete separation between oxidizing species and the steel substrate. The thin oxide scale was observed on top of the SiON coating for all the atmospheres, which was attributed to the diffusion of metallic species (Cr, Mn, and Fe) in the AISI 441 substrate through the SiON coating.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

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