The phase composition and structure of the niobium-silicon composite manufactured by directional solidification in the liquid metal cooler

Kuzmina N.A., Bondarenko Yu.A.
UDC
669.018.44
DOI
10.18577/2307-6046-2016-0-5-3-3
Article PDF (Russian) (973.89 KB)
How to cite
Kuzmina N.A., Bondarenko Yu.A. The phase composition and structure of the niobium-silicon composite manufactured by directional solidification in the liquid metal cooler // Proceedings of VIAM. 2016. No. 5. DOI: 10.18577/2307-6046-2016-0-5-3-3. URL: https://test.viam.ru/en/journal/2016/5/3
Abstract

The research of high-temperature heat-resistant alloy based on niobium-silicon system – Nb–Nb5Si3, obtained in the process of high-gradient directional solidification with a flat growth front without the use of seed has been carried out. The data of metallography and X-ray powder diffraction have been obtained, phase, structural and quantitative analysis has been carried out, crystallographic orientation of the matrix and reinforcing phases of eutectic composite has been determined. The comparative description of structural parameters of the phases at different stages of solidification along the height of the ingot from the beginning of solidification to the residual melt has been provided. Work is executed within implementation of the complex scientific direction 9.4. «Composites on the basis of the refractory metals, strengthened by intermetallic compound» («The strategic directions of development of materials and technologies of their processing for the period till 2030»)

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