Electron Microscopic Analysis of the Nb5Si3/NBC/NbSi2 Composite Structure

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The method of aluminothermic self-propagating high-temperature synthesis was used to obtain a composite material based on Nb-Si-C. The study of this system is of interest from the point of view of obtaining high-temperature materials of a new generation for gas turbine engine building, capable of replacing heat-resistant nickel alloys, as well as the potential possibility of forming MAX-phases (phases Mn + 1AXn where n = 1, 2, 3, ...; M is transitional d-metal, A – p-element, X – carbon). The resulting Nb-Si-C composite were studied by X-ray diffraction, scanning electron microscopy, and X-ray spectral microanalysis. It is shown that NbC carbide and silicides γ-Nb5Si3 and NbSi2 are formed in the sample. A detailed analysis of the morphological distribution of the constituent phases has been carried out.

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作者简介

R. Nikonova

Scientific Center for Metallurgical Physics and Materials Science, Udmurt Federal Research Center of the UB of the RAS

编辑信件的主要联系方式.
Email: rozam@udman.ru
俄罗斯联邦, Izhevsk

N. Larionova

Scientific Center for Metallurgical Physics and Materials Science, Udmurt Federal Research Center of the UB of the RAS

Email: rozam@udman.ru
俄罗斯联邦, Izhevsk

V. Ladyanov

Scientific Center for Metallurgical Physics and Materials Science, Udmurt Federal Research Center of the UB of the RAS

Email: rozam@udman.ru
俄罗斯联邦, Izhevsk

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补充文件

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2. Fig. 1. Diffractogram from Nb-Si-C sample and bar diagrams corresponding to phases NbSi2, NbC, Nb5Si3

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3. Fig. 2. Image of the sample fracture surface obtained by scanning electron microscopy

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4. Fig. 3. Distribution maps of Nb, Si, C on a separate section of the sample fracture surface

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