About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
High-Temperature Corrosion and Degradation of Materials
|
| Presentation Title |
Optimizing Conditions for Environmental Barrier Coating Testing in High-temperature, High-velocity Steam Environments |
| Author(s) |
Matthew Caulfield, Elizabeth Opila |
| On-Site Speaker (Planned) |
Matthew Caulfield |
| Abstract Scope |
Ytterbium disilicate has emerged as a key material for Environmental Barrier Coatings (EBCs) applied to silicon carbide (SiC) ceramic matrix composites (CMCs) for high-temperature gas-turbine engine applications. These coatings protect the underlying SiC CMCs from harsh environments, where high-temperature high-velocity steam present in the combustion environment poses significant challenge for the long-term thermochemical stability of EBCs. A horizontal tube furnace, termed a “steam jet,” has been built in which high-velocity water vapor (~250 m/s) impinges on EBC coated CMCs at temperatures up to 1500°C, replicating the range of standard operating conditions seen in a gas-turbine engine. The study explores key parameters such as sample angle, standoff distance, capillary tube diameter, and steam mass flow rate, using computational models to guide experimental setup with the goal of maximizing the uniformity and extent of the silica (SiO2) depleted area on reaction-bonded SiC and EBC-coated SiC samples. |