Hajra, P. ; Saha, D. R. ; Mada, M. R. ; Dutta, S. ; Brahma, P. ; Boughton, P. ; Bandyopadhyay, S. ; Chakravorty, D. (2014) High creep strain rates observed in nanocrystalline α-Fe2O3 particles by nanoindentation measurement Materials Science and Engineering: A, 605 . pp. 1-7. ISSN 0921-5093
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.msea.2014.03.038
Abstract
Nanocrystalline α-Fe2O3 with particle sizes in the range 10–24 nm were produced by mechanical milling of micron-sized α-Fe2O3 particles. Microstructures of sintered pellets of cold compacted powder were investigated by electron microscopy. Nanoindentation studies showed the creep strain rates had values of the order of 10−4 s−1 at room temperature with creep increasing to higher values with increase of particle diameter. This was attributed to grain boundary sliding enhancement due to a piezomagnetic-type effect in the particles. Compressive tests at room temperature carried out on bulk samples with nanosized crystallites also showed large creep strain rate behaviour. The result will be helpful in designing ceramic systems with plastic behaviour at room temperature.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Nanoindentation; Mechanical Properties; Nanocrystalline α-Fe2O3; Nanocomposites; Creep Strain Rate |
| ID Code: | 98630 |
| Deposited On: | 01 Dec 2014 10:11 |
| Last Modified: | 01 Dec 2014 10:11 |
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