| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1498318 | Scripta Materialia | 2015 | 4 Pages |
Abstract
Nanocrystalline yttria was prepared by mechanical processing. A fraction was annealed in air at 473 K. Annealed and non-annealed powders were treated in Ar at temperatures between 700 and 1000 K, which induced a parabolic grain growth kinetics with an Arrhenius-like dependence on temperature. Grain growth is significantly slower in annealed powders with respect to non-annealed ones. This is related to oxygen chemical absorption during annealing in air and the consequent decrease of oxygen vacancies originally present in powders.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Sebastiano Garroni, Roberto Orrù, Francesco Delogu, Giacomo Cao,