About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Phase Transformations in Ceramics: Science and Applications
|
| Presentation Title |
Characterization of High-Energy Ball Mill Induced Metastable Phase Transformations in Lanthanide Sesquioxides |
| Author(s) |
William Jackson Reed, Casey Corbridge, Antonio Fuentes, Eric O'Quinn, Changyong Park, David Sprouster, Maik Lang |
| On-Site Speaker (Planned) |
William Jackson Reed |
| Abstract Scope |
High-energy ball milling utilizes mechanical stress to drive chemical and physical transformations. The energy transfer from sample-tool interactions inside the milling container creates far-from-equilibrium conditions characterized by extreme temperature and pressure transients. These conditions induce phase transformations in Ln2O3 lanthanide sesquioxides from the cubic (C-type) to the monoclinic (B-type). A systematic investigation of this phase transformation behavior is presented utilizing tungsten carbide tools in a planetary ball mill as a function of Ln2O3 composition, milling speed, and milling time. The phase-formation rates with milling time were approximated for all systems using a Poison-type direct-impact model, showing that both C-to-B and B-to-C transformations occur during sample-tool interactions, which strongly depend on the Ln cation size of the compound and the milling speed. |