Diffusion Paths for Interstitial Impurities in Different Polymorphic Modifications of Niobium Silicide Nb5Si3
| Autor: | D. A. Yakushev, Nikolay N. Eremin, N. A. Muromtsev, A. V. Neuman, I. L. Svetlov, N.A. Kuzmina, Ekaterina I. Marchenko |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
020502 materials Diffusion Niobium Analytical chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound 0205 materials engineering chemistry Impurity Phase (matter) Silicide General Materials Science Solubility Boron Carbon |
| Zdroj: | Crystallography Reports. 63:319-326 |
| ISSN: | 1562-689X 1063-7745 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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