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Nonequilibrium alloy formation in the immiscible Cu–Mo system studied by thermodynamic calculation and ion beam mixing

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5 Author(s)
Bai, X. ; Department of Materials Science and Engineering, Advanced Materials Laboratory, Tsinghua University, Beijing 100084, China ; Wang, T.L. ; Ding, N. ; Li, J.H.
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For the equilibrium immiscible Cu–Mo system characterized by a positive heat of formation (+19 kJmol-1), thermodynamic calculation showed that by adding an adequate interfacial free energy, the Gibbs free energy of the Cu–Mo multilayered films could be elevated up to a higher level than the convex-shaped free energy curve of the amorphous phase and supersaturated solid solutions. Accordingly, ion beam mixing of the Cu–Mo multilayered samples did result in forming a unique amorphous phase with an alloy composition around 80 at. % Mo and two supersaturated solid solutions of fcc and bcc structures at around 27 at. % and 90 at. % Mo, respectively, matching well with the thermodynamic calculation.

Published in:

Journal of Applied Physics  (Volume:108 ,  Issue: 7 )

Date of Publication:

Oct 2010

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