Processing of Polymer-Derived Ceramic Composite Coatings on Steel

Polymer‐derived ceramic composites are being investigated as environmental barrier coatings to protect stainless steel from oxidation and carburization. Coatings have been produced using poly(hydridomethylsiloxane) as a preceramic polymer and titanium disilicide as an expansion agent. Processing par...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2008-01, Vol.91 (1), p.41-45
Main Authors: Torrey, Jessica D., Bordia, Rajendra K.
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Ceramics
Cermets, ceramic and refractory composites
Chemical industry and chemicals
Corrosion protection
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals. Metallurgy
Miscellaneous
Other materials
Physics
Polymers
Porosity
Protective coatings
Specific materials
Stainless steel
Steel
Surface treatments
Technical ceramics
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Description
Summary:Polymer‐derived ceramic composites are being investigated as environmental barrier coatings to protect stainless steel from oxidation and carburization. Coatings have been produced using poly(hydridomethylsiloxane) as a preceramic polymer and titanium disilicide as an expansion agent. Processing parameters have been optimized and a relationship has been derived to predict the final coating thickness based on slurry viscosity and dip coating withdrawal speed. Microstructural analysis reveals a composite coating of oxidized filler particles in a silica matrix. A diffusion layer is visible at the coating–steel interface, indicating good bonding. The optimized coatings are ∼18 μm thick, and have some residual porosity and a density of 2.56 g/cm3.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2007.02019.x