| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Grain Boundaries, Interfaces, and Surfaces in Ceramics: Fundamental Structure—Property—Performance Relationships
|
| Presentation Title |
Surface and Fracture Energy in Layered Ceramics |
| Author(s) |
Oriol Gavalda-Diaz, Katharina Marquardt, Eduardo Saiz, Finn Giuliani |
| On-Site Speaker (Planned) |
Oriol Gavalda-Diaz |
| Abstract Scope |
Layered materials such as graphite or MAX phases are present in many applications and environments such as geology, energy storage or nuclear energy. Their layered structure results in a material with stronger in-(basal)-plane than out-of-plane ({0001} basal plane) bonds. This results in a marked anisotropy in surface energy that can be employed, for instance, to engineer toughening in structural components but also as a way of storing ions in batteries. However, the quantification of interfacial and fracture energies in these materials have proven challenging. In this work we use small-scale fracture testing to evaluate the basal plane failure in two different layered materials: a Ti3SiC2 MAX phase and Highly Ordered Pyrolytic Graphite (HOPG). The goal is to measure basal plane delamination energies in order to understand how they are influenced by chemistry and how they affect fracture. |