THERMODYNAMIC ANALYSIS OF PHASE FORMATION IN MECHANICAL ALLOYEDFe3AlPOWDER

L. X. Pang (), X. H. Hao, N. F. Han, J. Xu, X. D. Tang and J. Li
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L. X. Pang: Department of Civil Engineering, Shandong Jiaotong University, Jinan 250023, P. R. China
X. H. Hao: Department of Civil Engineering, Shandong Jiaotong University, Jinan 250023, P. R. China
N. F. Han: Department of Civil Engineering, Shandong Jiaotong University, Jinan 250023, P. R. China
J. Xu: Department of Civil Engineering, Shandong Jiaotong University, Jinan 250023, P. R. China
X. D. Tang: Department of Civil Engineering, Shandong Jiaotong University, Jinan 250023, P. R. China
J. Li: School of Material Science and Engineering, Jinan University, Jinan 250022, P. R. China

Surface Review and Letters (SRL), 2011, vol. 18, issue 03n04, 115-120

Abstract: Nanocrystalline supersaturated solid solutions were formed by mechanically alloyedFe-28Al(in atom percent) from the elemental powder of iron and aluminum. Phase evolution, grain size and lattice strain of these powders were determined and discussed. A thermodynamic model was developed based on semi-experimental theory of Miedema to calculate the chemical driving force for phase evolution. The influence of thermodynamic driving forces, namely the Gibbs free energy of mixing, for the solid solution and the amorphous was discussed and corresponded to the sequence of phase formations during mechanical alloying.

Date: 2011
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DOI: 10.1142/S0218625X11014540

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