About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
ACerS-ECerS Joint Symposium: Emerging Leaders in Glass and Ceramics
|
| Presentation Title |
Micromechanical Testing of Ceramic Coatings for Nuclear Applications Up to 1000°C |
| Author(s) |
Dong (Lilly) Liu |
| On-Site Speaker (Planned) |
Dong (Lilly) Liu |
| Abstract Scope |
Multi-layered ceramic coatings, such as SiC and PyC, have been used to encapsulate spherical nuclear fuel kernels for several GenIV nuclear fission reactor designs. These coatings are typically between 30 µm to 100 µm thick and will subject to harsh environments. It is important to acquire local mechanical properties of these individual coating layers as well as the interfacial strength between the coatings for better understanding of their structural integrity and to support performance modelling. In this work, nanoindentation tests were carried out on SiC and PyC coatings over a range of temperatures from ambient to 1000°C with and without in-situ SEM imaging. The change of modulus and hardness as a function of temperature will be presented. In addition, micro-cantilever bending method was utilized to evaluate the interfacial strength between the SiC and PyC coatings. The local mechanical properties and residual stresses measured are correlated with the coating deposition process. |