Datta, M. K. ; Pabi, S. K. ; Murty, B. S. (2001) Thermal stability of nanocrystalline fcc and hcp Ni(Si) synthesised by mechanical alloying of Ni90Si10 Philosophical Magazine Letters, 81 (2). pp. 77-84. ISSN 0950-0839
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Official URL: http://www.tandfonline.com/doi/abs/10.1080/0950083...
Related URL: http://dx.doi.org/10.1080/095008301300006717
Abstract
The thermal stability of nanocrystalline fcc and hcp Ni(Si), obtained by mechanical alloying of Ni90Si10, has been studied. The allotropic transformation from fcc to hcp Ni(Si) is accompanied by a volume expansion of 8.6% and is observed when fcc Ni(Si) reaches a critical crystallite size of 10nm. The hcp phase transforms to stable fcc Ni(Si) at 573K. It has been identified that the lattice distortion in nanometre-sized crystallites from the equilibrium configuration and the decrease in the interfacial energy with grain refinement act as self obstacles in controlling the grain growth of nanocrystalline materials.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Taylor and Francis Group. |
| ID Code: | 73377 |
| Deposited On: | 02 Dec 2011 08:00 |
| Last Modified: | 02 Dec 2011 08:00 |
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