Structure of Nb-Si-C-based composite obtained by self-propagating high-temperature synthesis

•γ-Nb5Si3/NbC/NbSi2 composite has been obtained by SHS of Nb2O5-SiC-Al-Mg system.•The morphological distribution of phases of composite has been studied.•In the presence of carbon, γ-Nb5Si3 is formed, which is the Novotny phase.•The changes of crystal structure of phases after heating have been anal...

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Bibliographic Details
Published in:Materials letters 2023-10, Vol.349, p.134900, Article 134900
Main Authors: Larionova, N.S., Nikonova, R.M., Ladyanov, V.I.
Format: Article
Language:English
Subjects:
Composite materials
Crystal structure
Electron microscopy
Microstructure
SHS
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Summary:•γ-Nb5Si3/NbC/NbSi2 composite has been obtained by SHS of Nb2O5-SiC-Al-Mg system.•The morphological distribution of phases of composite has been studied.•In the presence of carbon, γ-Nb5Si3 is formed, which is the Novotny phase.•The changes of crystal structure of phases after heating have been analyzed. Alumothermic self-propagating high-temperature synthesis was used for obtaining 2Nb-1Si-1C composite material. The morphology, structure and phase composition of the composite were studied by X-ray diffraction and scanning electron microscopy. It was found that γ- Nb5Si3, NbC, NbSi2 phases were formed in the sample.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2023.134900