About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
Corrosion, Irradiation, and Cracking Studies in Support of Coating Development for SiC-based Accident Tolerant Fuel Cladding |
Author(s) |
Stephen Raiman, Peter Doyle, Peter Mouche, Yutai Katoh |
On-Site Speaker (Planned) |
Stephen Raiman |
Abstract Scope |
SiC/SiC ceramic matrix composite (CMC) materials are attractive candidate materials for accident tolerant fuel (ATF) cladding. To improve hermiticity and compatibility with the coolant water, dual-purpose coatings are in development.
To test the performance of the coating candidates during normal operating conditions, SiC and SiC/SiC composite samples were prepared with TiN, Cr, and CrN coatings. The samples were exposed to high temperature water in autoclaves to test their durability in light water reactor (LWR) conditions and irradiated in the MIT reactor to determine their radiation tolerance.
Several coatings cracked during irradiation, perhaps due to differential swelling between the coatings and substrates. Some coatings that were irradiated in coolant water had higher rates of corrosion when compared to samples exposed to the same conditions without irradiation. This talk reports on the finding from the first generation of dual-purpose coatings and discusses current development efforts on second generation coatings. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Other, |