| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Coatings to Protect Materials from Extreme Environments
|
| Presentation Title |
Protocol for Selecting Exemplary Silicate Deposit Compositions for Evaluation of Thermal and Environmental Barrier Coatings |
| Author(s) |
Andrew Ericks, Frank Zok, David Poerschke, Carlos Levi |
| On-Site Speaker (Planned) |
Andrew Ericks |
| Abstract Scope |
Molten silicate deposits pose a significant threat to the durability of protective oxide coatings in aeroengines. But the spread in deposit properties remains largely unexplored, hindering critical evaluation of candidate coating materials. To address this deficiency, a comprehensive dataset of over 100 compositions was compiled from various sources, and the thermophysical properties of each was computed using established analytical or computational models. Classes of deposits sharing similar compositional and property profiles are identified using principal component analysis and k-means clustering. The structure of the dataset is reduced to four distinct compositional classes. More importantly, the study represents a conceptual advancement in selection of exemplary compositions from a large disparate population in order to guide experimental and computational assessments of coating durability in service-relevant environments. |