Densification and grain growth during sintering of porous Ce<sub>0.9</sub>Gd<sub>0.1</sub>O<sub>1.95</sub>tape cast layers: A comprehensive study on heuristic methods
- Authors:
- DOI:
- 10.1016/j.jeurceramsoc.2013.03.025
- Abstract:
- The sintering behavior of porous Ce0.9Gd0.1O1.95(CGO10) tape cast layers was systematically investigated to establish fundamental kinetic parameters associated to densification and grain growth. Densification and grain growth were characterized by a set of different methods to determine the dominant sintering mechanisms and kinetics, both in isothermal and at constant heating rate (iso-rate) conditions. Densification of porous CGO10 tape is thermally activated with typical activation energy which was estimated around 440–470 kJ mol−1. Grain growth showed similar thermal activation energy of ∼427 ± 22 kJ mol−1in the temperature range of 1100–1250ºC. Grain-boundary diffusion was identified to be the dominant mechanism in porous CGO10 tapes. Grain growth and densification mechanism were found strictly related in the investigated temperature range. Porosity acts as a grain growth inhibitor and grain boundary mobility in the porous body was estimated around 10−18–10−16m3N−1s−1 at the investigated temperature range.© 2013 Elsevier Ltd. All rights reserved.
- Type:
- Journal article
- Language:
- English
- Published in:
- Journal of the European Ceramic Society, 2013, Vol 33, Issue 13-14, p. 2529-2537
- Keywords:
- Sintering; Grain growth; CeO2; Porosity; Grain boundary
- Main Research Area:
- Science/technology
- Publication Status:
- Published
- Review type:
- Peer Review
- Submission year:
- 2013
- Scientific Level:
- Scientific
- ID:
- 242800003