| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Engineering Ceramics: Microstructure-Property-Performance Relations and Applications
|
| Presentation Title |
Heterointerface and Grain Boundary Energies, Chemical Segregation, and Their Influence on Microstructure in Multiphase Ceramics |
| Author(s) |
Komal Syed, Nadjia Motley, William Bowman |
| On-Site Speaker (Planned) |
William Bowman |
| Abstract Scope |
Heterointerface energy measurements for multiphase systems are rarely reported, in contrast to grain boundary (GB) energies for single phase systems. Here, thermal groove dimensions of single-phase, two-phase, and three-phase (YSZ, Al2O3, MgAl2O4) ceramics were measured to calculate relative energies for six different types of interfaces [1-2]. We show that interface areas in multiphase composites are governed by relative energies, e.g., Al2O3-Al2O3 occur less frequently in multiphase systems, attributed to higher relative GB energies. We also show that heterointerface energies are intermediate between the GB energies of the two constituent phases. Interface energies for any specific type of boundary were similar for single phases versus multiphases, but the influence of GB chemistry variations is reflected in the energy distribution. Our novel insights on interface energies can inform materials design due to their strong influences on microstructural evolution.
[1] K. Syed…W.J. Bowman (2022) Acta Materialia
[2] K. Syed…M.L. Mecartney (2020) Materialia |