Udhayabanu, V. ; Singh, Navneet ; Murty, B. S. (2010) Mechanical activation of aluminothermic reduction of NiO by high energy ball milling Journal of Alloys and Compounds, 497 (1-2). pp. 142-146. ISSN 0925-8388
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.jallcom.2010.03.089
Abstract
The effect of mechanical activation on NiO-Al reaction has been investigated by carrying out high energy ball milling using toluene as the process controlling agent. NiO reduction reaction progresses gradually and a maximum of 70% reduction has been observed in 20 h of milling. Amorphous alumina forms as the product of NiO reduction and it transforms to stable α-Al2O3 at 1000 °C via the formation of metastable transition γ-Al2O3. The activation energy of NiO reduction in unmilled powder is 277 kJ/mol whereas in 20 h milled powder the activation energy has been reduced to 150 kJ/mol.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Nanostructured Materials; Mechanical Alloying; Solid State Reaction; Kinetic; X-ray Diffraction; Transmission Electron Microscopy |
| ID Code: | 73901 |
| Deposited On: | 08 Dec 2011 03:56 |
| Last Modified: | 08 Dec 2011 03:56 |
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