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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium 2026 Technical Division Student Poster Contest
Presentation Title SPG-94: Surface Roughness of Silicone Oxycarbide Coatings for Extreme Environments: Effects of Glass Filler Loading and Heat Treatment
Author(s) Taehyun Kim, Ravi Arukula, Xiaoning Qi
On-Site Speaker (Planned) Taehyun Kim
Abstract Scope High-temperature silicone oxycarbide (SiOC) coatings can be fabricated on steel substrates via a polysiloxane conversion process. These coatings provide corrosion resistance and thermal stability in extreme environments. A smooth coating surface is critical to maintain desired properties and anti-corrosion performance. Controlling the surface roughness of SiOC coatings remains a challenge due to pyrolysis-induced volume shrinkage, which can lead to cracks and porosity and, in turn, increase surface roughness . This study investigated the effects of glass filler (GF) loading, GF pre-processing, and heating profiles on the roughness of SiOC coatings. Profilometer measurements show an average surface roughness (Ra) range of 6.26-12.36µm by controlling GF loading, 5.03-22.76µm by heating profile, and 12.36-13.61µm by pre-processing GFs . These results demonstrate that GF loading and heating profiles are the main factors affecting the surface roughness. In summary, these studied effects suggest we could potentially control surface roughness at the micrometer scale.
Proceedings Inclusion? Undecided
Keywords High-Temperature Materials, Surface Modification and Coatings, Ceramics

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