Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1448960 | Acta Materialia | 2010 | 9 Pages |
Abstract
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 (λ=1.3112Å) permitted establishment of its kinetics, which could be modeled according to an equation expressed as kt=[α/(1-α)]3/2kt=[α/(1-α)]3/2. From 1530 to ≈600°C an activation energy of 9 ± 2 kJ mol−1 was estimated. Also, the crystallite size evolution on cooling was established to vary from ≈14≈14 nm at 1530 °C to ≈28≈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.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
X. Turrillas, M.J. Mas-Guindal, T.C. Hansen, M.A. Rodríguez,