Niobium silicide synthesis by spark plasma sintering of composite powders

Efimochkin I.Yu., Kuzmina N.A., Grachshencov D.V., Svetlov I.L., Bobrovkiy A.P.
UDC
621.762.222
DOI
10.18577/2307-6046-2018-0-11-54-63
Article PDF (Russian) (1.03 MB)
How to cite
Efimochkin I.Yu., Kuzmina N.A., Grachshencov D.V., Svetlov I.L., Bobrovkiy A.P. Niobium silicide synthesis by spark plasma sintering of composite powders // Proceedings of VIAM. 2018. No. 11. DOI: 10.18577/2307-6046-2018-0-11-54-63. URL: https://test.viam.ru/en/journal/2018/11/7
Keywords
high-temperature materials, composite materials, Nb–Si system, niobium silicide, mechanical alloying, synthesis, spark plasma sintering, structure.
Abstract

The possibility of niobium silicide synthesis by the spark plasma technique from a binary mixture of mechanical alloyed elemental powders is considered. The X-ray phase analysis of the synthesized samples of niobium silicide was carried out, their microstructure were investigated by the methods of scanning electron microscopy, and X-ray microscopic analysis were used to evaluate the elemental composition. The performed X-ray phase analysis of the synthesized samples demonstrated the preparation of stable tetragonal α-Nb5Si3 and hexagonal γ-Nb5Si3, stabilized by intercalation of carbon atoms. The stability of obtained samples of niobium silicide under 1500°Cfor 10 h was investigated.

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