Abstract
High-density ceramics of ceria doped with 0, 3, 5, 10, 15 and 20 mol.% Gd and with grain sizes exceeding 1.5 μm were investigated by nanoindentation. The deduced elastic moduli are independent of Gd content and remain close to the value reported for bulk ceramics (210 ± 5% GPa). All ceramics exhibit transient creep with displacement proportional to the 1/3 power of the time. For 0.05 < x < 0.2, the derived creep magnitude parameter decreases linearly with increasing Gd content. These results strongly suggest that defect rearrangement influences the measurements.
| Original language | English |
|---|---|
| Pages (from-to) | 155-158 |
| Number of pages | 4 |
| Journal | Scripta Materialia |
| Volume | 66 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - Feb 1 2012 |
Keywords
- Creep rate
- Elastic modulus
- Gd-doped ceria
- Nanoindentation
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
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Korobko, R., Chen, C. T., Kim, S., Cohen, S. R., Wachtel, E., Yavo, N., & Lubomirsky, I. (2012). Influence of Gd content on the room temperature mechanical properties of Gd-doped ceria. Scripta Materialia, 66(3-4), 155-158. https://doi.org/10.1016/j.scriptamat.2011.10.027