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June 2016, № 6 (194)

Zakharov P.V., Eremin A.M., Manakov N.A., Starostenkov M.D., Vdovin R.S. COOPERATIVE ATOMIC DISPLACEMENTS NEAR INTERPHASE BOUNDARIES NI-γFEBy method of molecular dynamics studied the cooperative atomic displacements near the interface a bimetal solid-phase contact Ni-γFe. The differences in the behavior of the Ni and Fe atoms with their participation in the process of mass transfer across borders is established. Currently still a lot of unresolved issues related to the atomic structure of interfaces and mechanisms of their interaction with a variety of defects generated by, for example, by radiation exposure. In particular, special interest is the cooperative atomic displacements near the interphase boundaries and their contribution to the transport of energy and mass. It is shown that the introduction of interstitial atoms near the interface can cause a cooperative atomic displacements that lead to the climb of misfit dislocations. All cooperative atomic displacements proceeded on crowdions mechanism along the packed rows. The differences of behavior of atomic displacements on the number of interstitial atoms, and their type. The differences in the behavior of atoms, apparently, due to the high binding energy of the type Ni-γFe compared with connections type γFe-γFe, resulting in the Fe atoms are more mobile than the Ni atoms and penetrate through the interface is much more intense. Such activity of Fe atoms near the interface Ni-γFe border creates the preconditions for the consideration of such phenomena in the boundary as the basis for the creation of new materials with specific desired properties.Key words: bimetal, cooperative atomic displacements, misfit dislocations, interphase boundary, the method of molecular dynamics.

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About this article

Authors: Eryomin A.M., Zaharov P.V., Manakov N.A., Starostenkov M.D., Vdovin R.S.

Year: 2016

Editor-in-chief

Sergey Aleksandrovich
MIROSHNIKOV

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