About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2023
|
Presentation Title |
Corrosion Resistant SiOCN Coatings on Steel with Repair Capability |
Author(s) |
Kathy Lu, Hyeon Joon Choi |
On-Site Speaker (Planned) |
Kathy Lu |
Abstract Scope |
Corrosion of spent nuclear fuel storage canister is a serious concern due to deposition of corrosive marine salts by inducing chloride-induced pitting corrosion. Ceramic coatings are desirable options thanks to their high resistance to corrosive environments and good mechanical properties. However, the interfacial compatibility with the steel substrate is a challenge. In this study, a SiOCN coating has been developed based on polysilazane and polysiloxane preceramic polymers. The multilayer coating system consists of a 600 nm thick SiON bond coat, a 66 nm thick SiOC buffer layer, a 604 nm thick SiONC main coat, and a 50 nm thick SiON/SiO2 top coat. Coating composition and structural evolution were analyzed. The SiOCN amorphous coating showed improved hardness and reduced modulus than the SiON layer only. The coating can also be repaired after damage. This coating provides a new approach of extending the lifetime of nuclear waste container in corrosive conditions. |
Proceedings Inclusion? |
Planned: |