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Sign of the interaction parameter in disordered Fe–Al alloys

✍ Scribed by Simon Dorfman; David Fuks; Vlad Liubich

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
279 KB
Volume
70
Category
Article
ISSN
0020-7608

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✦ Synopsis

In the framework of the coherent potential approximation we show that the interaction parameter for disordered Fe᎐Al alloy strongly depends on the concentration. The calculations were provided within linear muffin-tin orbital formalism in the atomic sphere approximation. Calculation data for B2 phase for different Ž . concentrations were used to extract the interaction parameter, V 0 , for disordered solid solutions and were compared with the parameter treated from the X-ray scattering data.

Ž . The concentration dependence of V 0 leads to the failure of the application of the regular solid solution model to the study of the phase relations in the Fe᎐Al system.

Ž . Parameter V k , which is responsible for ordering tendency, also depends on s concentration, and it is in accordance with the experimental data.

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