| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
|
| Presentation Title |
Grain Boundary Character and Relative Energy Distributions in Nanocrystalline Metallic Films |
| Author(s) |
Matthew J. Patrick, Gregory S. Rohrer, Katayun Barmak |
| On-Site Speaker (Planned) |
Matthew J. Patrick |
| Abstract Scope |
Grain boundary character distributions (GBCD) and relative grain boundary energy distributions (GBED) are routinely calculated from 3D serial-section electron backscatter diffraction (EBSD) data from microcrystalline bulk samples, and are found to be inversely correlated. For nanocrystalline thin films, precession electron diffraction (PED) has proven an effective method to measure the GBCD, but the GBED has not been reconstructed. Here, we attempt to adapt the established energy reconstruction method to PED data from films with columnar grain structures, where serial sectioning is not required to determine boundary inclination. The relative GBED does not, however, correlate with Read-Shockley-Wolf (RSW) calculated energies nor does it inversely correlate with the GBCD for either a 40 nm-thick tungsten film or a set of three 100 nm-thick aluminum samples. This failure likely implies that the assumed Herring condition of force balance does not fully specify the geometry at triple junctions in these films. |