| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Multiphase Coatings for Environments with Multiple Degradation Mechanisms |
| Author(s) |
Luis Granadillo, Ian McCue |
| On-Site Speaker (Planned) |
Luis Granadillo |
| Abstract Scope |
Hard coatings deposited via thermal spray are widely used to enhance the corrosion, wear, and oxidation resistance of metal alloys. However, it is challenging to design coatings for materials in environments with multiple degradation mechanisms, such as corrosion fatigue. While it is well-established that corrosion pits nucleate fatigue cracks, coatings in aqueous environments only perform well under static loading conditions and eventually fail in dynamic environments either by delamination or developing deleterious cracks themselves. In this work, we hypothesize that the ideal coating is a multi-phase bicontinuous composite, where the constituent phases synergistically act to electrochemically induce surface-healing mass-transport, while simultaneously imparting exceptional fracture toughness. These coatings are fabricated via deposition of a homogeneous material, which then undergoes a peritectic reaction with the substrate during a post-deposition heat treatment. This talk will discuss the kinetics of this reaction, the morphology and length scale of the resulting coating, and its properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Process Technology, Mechanical Properties |