UDC
666.7
DOI
10.18577/2307-6046-2026-0-7-134-144
Article PDF (Russian) (1.35 MB)
How to cite
V.V. Kholodova, D.I. Vershinin, N.E. Shchegoleva Liquid‑phase sintering of ceramics based on Si₃N₄ with complex oxide additives // Proceedings of VIAM. 2026. No. 7. DOI: 10.18577/2307-6046-2026-0-7-134-144. URL: https://viam-works.ru/en/journal/2026/7/10

Liquid‑phase sintering of ceramics based on Si₃N₄ with complex oxide additives

V.V. Kholodova, D.I. Vershinin, N.E. Shchegoleva
Abstract

The study investigates the influence of sintering additive concentrations on sintering process, resulting microstructure, physical and mechanical properties of silicon nitride based ceramics. It has been established that increasing the concentration of additive complexes from 5 to 15 wt. % increases the average density and the level of physical and mechanical properties of Si₃N₄ based ceramics. During sintering, complete transformation of α-Si₃N₄ into β-Si₃N₄ is observed with formation of elongated crystals. The nature of sintering process and formed microstructure are largely depend on the composition and properties of the molten additives.

Keywords
silicon nitride, liquid-phase sintering, sintering additives, activation of sintering, free sintering, high densification
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