Diffusion Paths for Interstitial Impurities in Different Polymorphic Modifications of Niobium Silicide Nb5Si3


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Structural models of the α, β, and γ modifications of Nb5Si3 silicides, which are used as a reinforcing phase in composites obtained in situ based on the Nb‒Si system, have been constructed by computer simulation methods. A geometric analysis of unit cells is performed using the H-poisk program to estimate the voids existing in the structures. The results of measuring the number of voids and their sizes are reported. A conclusion about possible diffusion paths of interstitial boron, carbon, nitrogen and oxygen atoms is drawn based on the calculation results, and the solubility of these impurities in the structure of each Nb5Si3 modification is estimated.

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N. Kuzmina

All-Russia Scientific Research Institute of Aviation Materials

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Email: viamlab1@mail.ru
俄罗斯联邦, Moscow, 105005

N. Eremin

Moscow State University

Email: viamlab1@mail.ru
俄罗斯联邦, Moscow

E. Marchenko

Moscow State University

Email: viamlab1@mail.ru
俄罗斯联邦, Moscow

I. Svetlov

All-Russia Scientific Research Institute of Aviation Materials

Email: viamlab1@mail.ru
俄罗斯联邦, Moscow, 105005

N. Muromtsev

Moscow State University

Email: viamlab1@mail.ru
俄罗斯联邦, Moscow

A. Neuman

All-Russia Scientific Research Institute of Aviation Materials

Email: viamlab1@mail.ru
俄罗斯联邦, Moscow, 105005

D. Yakushev

Moscow State University

Email: viamlab1@mail.ru
俄罗斯联邦, Moscow

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