Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1499351 | Scripta Materialia | 2012 | 4 Pages |
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Roman Korobko, Chien-Ting Chen, Sangtae Kim, Sidney R. Cohen, Ellen Wachtel, Nimrod Yavo, Igor Lubomirsky,