About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Sintering and Related Powder Processing Science and Technologies
|
| Presentation Title |
Convenient application of SPS in the understanding of fundamental kinetics and sintering behavior in ceramics |
| Author(s) |
Caen Ang, Sean Drewry, Ethan Payne, Brandon Connor |
| On-Site Speaker (Planned) |
Caen Ang |
| Abstract Scope |
Use of Spark Plasma Sintering (SPS) as a conceptual "hammer" to rapidly consolidate difficult-to-sinter materials is a common perception of its utility. However, its use in understanding kinetics of sintering is valid since temperature, time and shrinkage data are typically recorded. These are the key variables that satisfy the requirements of models developed by the pioneers such as Coble, Johnson and Young. This work demonstrates the utility of minimal pressure to obtain data on shrinkage with appropriate temperature and time intervals, followed by interpretation of sintering mechanisms, activation energies and extrapolation of meaningful kinetics. The refinements of the method are also demonstrated in 1) obtaining differential shrinkage rates and minimizing instrument feedback, 2) extrapolating or eliminating applied pressure, 3) ability to discern effects of vacancy / defect population and 4) investigating the capability to distinguish the slowest migrating species in a mixed ternary or complex compositions. |