V. N. Urtzev, D. A. Mirzaev, I. L. Yakovleva, N. A. Tereshchenko, “Cu-rich Precipitates Structural Forms During Decomposition of Alloys in Fe-Cu System”, Vestn. Samar. Gos. Tekhn. Univ., Ser. Fiz.-Mat. Nauki [J. Samara State Tech. Univ., Ser. Phys. Math. Sci.], 2010, Issue 1(20),Pages <nobr>244

Short Communication
Solid State Physics

Cu-rich Precipitates Structural Forms During Decomposition of Alloys in Fe-Cu System

V. N. Urtzev^a, D. A. Mirzaev^b, I. L. Yakovleva^c, N. A. Tereshchenko^c

^a Research & Technological Centre Ausferr limited liability company
^b Dept.of Physical Metallurgy and Solid State Physics, Southern Ural State University, Chelyabinsk
^c Lab. of Physical Metallurgy, Institute of Metal Physics, Ural Division of the Russian Academy of Sciences, Ekaterinburg

Abstract: Structural forms of copper during decomposition of supersaturated solid solutions in the Fe-Cu system are analyzed in thermodynamic terms. First-principles methods are used to calculate free energies of BCC, 9R and FCC phases of copper at themperature 0 K. The possibility that a spinodal reaction, which is followed by formation of a copper-rich BCC phase, takes place at initial stages of decomposition in the Fe-Cu system is substantiated.

Keywords: Fe-Cu alloys, solid solution decomposition, free energy, phase nucleation.

UDC: 669.153:669-157.8

MSC: 82D35

Original article submitted 30/VII/2009
revision submitted – 23/X/2009

DOI: 10.14498/vsgtu718