| Full text | |
| Author(s): |
Grosso, Robson L.
[1, 2, 3]
;
Muccillo, Eliana N. S.
[3]
;
Muche, Dereck N. F.
[2]
;
Jawaharram, Gowtham S.
[1]
;
Barr, Christopher M.
[4]
;
Monterrosa, Anthony M.
[4]
;
Castro, Ricardo H. R.
[2]
;
Hattar, Khalid
[4]
;
Dillon, Shen J.
[1]
Total Authors: 9
|
| Affiliation: | [1] Univ Illinois, Urbana, IL 61801 - USA
[2] Univ Calif Davis, Davis, CA 95616 - USA
[3] Energy & Nucl Res Inst IPEN, Sao Paulo - Brazil
[4] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 - USA
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Nano Letters; v. 20, n. 2, p. 1041-1046, FEB 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
This work demonstrates a novel approach to ultrahigh-temperature mechanical testing using a combination of in situ nanomechanical testing and localized laser heating. The methodology is applied to characterizing and testing initially nanograined 10 mol % Sc2O3-stabilized ZrO2 up to its melting temperature. The results suggest that the low-temperature strength of nanograined, d < 50 nm, oxides is not influenced by creep. Tensile fracture of ZrO2 bicrystals produce a weak-temperature dependence suggesting that grain boundary energy dominates brittle fracture of grain boundaries even at high homologous temperatures; for example, T = 2050 degrees C or T approximate to 77% T-melt. The maximum temperature for mechanical testing in this work is primarily limited by the instability of the sample, due to evaporation or melting, enabling a host of new opportunities for testing materials in the ultrahigh-temperature regime. (AU) | |
| FAPESP's process: | 16/06205-1 - Characterization of nanostructured scandia-zirconia ceramics consolidated by spark plasma sintering. |
| Grantee: | Robson Lopes Grosso |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 17/25501-3 - Grain size dependent phase transition and Hall-Petch relationship in nanocrystalline Scandia-Zirconia: an in-situ TEM study |
| Grantee: | Robson Lopes Grosso |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |