| Titre : | The thermal explosion synthesis of AlNi monitored by neutron thermodiffractometry (2011) |
| Auteurs : | X. Turrillas, Auteur ; M.J. Mas-Guindal, Auteur ; T.C. Hansen, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Acta materialia (Vol. 58 N° 7, Avril 2010) |
| Article en page(s) : | pp. 2769–2777 |
| Note générale : | Métallurgie |
| Langues : | Anglais |
| Tags : | Nickel aluminides Neutron diffraction Nucleation and growth Thermodiffraction |
| Résumé : | The synthesis of AlNi from thermally activated equimolar powder mixtures of aluminium and nickel was monitored in situ and acquired diffraction patterns every 2 s or less. The analysis of diffraction patterns View the MathML source permitted establishment of its kinetics, which could be modeled according to an equation expressed as kt=[α/(1-α)]3/2. From 1530 to View the MathML source an activation energy of 9 ± 2 kJ mol−1 was estimated. Also, the crystallite size evolution on cooling was established to vary from ≈14 nm at 1530 °C to ≈28 nm at 180 °C. Finally, the reaction was found to occur through the melting of aluminium and the subsequent dissolving of nickel to form the polycrystalline single-phase product, AlNi. |
| DEWEY : | 669 |
| ISSN : | 1359-6454 |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S1359645410000273 |
