| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Morphological Evolution Mechanisms in Phase-separating Polycrystalline Alloy Films Exposed to a Vapor Phase |
| Author(s) |
William Farmer, Rahul Raghavan, Kumar Ankit |
| On-Site Speaker (Planned) |
William Farmer |
| Abstract Scope |
Morphological self-assembly during physical vapor deposition (PVD) of immiscible alloy films is typically influenced by a kinetic interplay of deposition flux and atomic diffusion. However, such films often develop surface grooves depending on the energy of the film/vapor interface, which modifies the surface evolution characteristics of the phase-separated domains with respect to inner regions of the film. Till date, most studies deal with substrate-directed spinodal decomposition while any effect of the free surface has been neglected. Here, we employ a ternary Cahn-Hillard approach to explore the influence of atomic diffusion along the surface, grain boundaries, and interphase interfaces on phase separation in polycrystalline alloy films. Our systematic evaluation of the scaling laws as a function of surface depth provides novel insights into the role of surface grooving and film thickness while serving as an important first step in comprehending morphological evolution in PVD of phase separating alloys. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |