About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
|
| Presentation Title |
On the Generality of Σ3 as the Preferred Orientation at Interfaces of Crystals |
| Author(s) |
Catherine Zhou, Gregory S. Rohrer, Paul A. Salvador |
| On-Site Speaker (Planned) |
Paul A. Salvador |
| Abstract Scope |
The generality of a preferred orientation at crystalline interfaces will be demonstrated by analyzing computed grain boundary energies of metals from an epitaxial film perspective. fcc and bcc boundaries are sorted structurally in a fashion analogous to combinatorial substrate epitaxy (CSE) experiments. CSE observations made for several close-packed oxides will be briefly reviewed to support the hypothesis that a single preferred orientation relationship (OR) exists, regardless of interface plane, which we call the eutactic OR. The eutactic OR is structurally similar to the Σ3 coincident site lattice (CSL) OR for grain boundaries of metals. Based on low-energy outliers in the grain boundary populations, it is shown that the Σ3 CSL OR is the preferred OR for both metal families, also regardless of the interface orientation. The combined observations for metal grain boundaries and epitaxial oxides are consistent with the existence of a single preferred OR at interfaces of crystals. |