ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Using both the statistical-thermodynamics methods within the scope of the selfconsistentfield approximation and the diffraction data on coherent (or diffuse) scattering of X-rays(or thermal neutrons) from (dis)ordered f.c.c.-Ni–Fe alloys of various compositions, the estimationof interatomic interactions (including their magnetic contribution) and their temperature–concentration dependences were obtained. Based on the static concentration-wave representation,the expressions for configuration free energies of L12-Ni3Fe-type permalloy, L10-NiFe-type elinvarand L12-Fe3Ni-type invar were analyzed, considering explicit expressions for configuration entropiesof atomic and magnetic subsystems with their configuration internal energies. Phase diagramof a system at issue was plotted within the field of the presence of f.c.c.-Ni–Fe alloys; their phaseboundaries, equilibrium (static) properties near critical points (order parameter, etc.), and possiblemicrostructures developed by composition-controlled magnetic transitions and/or order–disorderconstant-composition solid–solid phase transformations were discussed. The obtained results werecompared with available experimental data
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.138.303.pdf
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