Regulating grain growth and sintering mechanism of Si3N4 ceramics: Three effects achieved simultaneously by controlling the amount of CaF2 additive

Regulating grain growth and sintering mechanism of Si3N4 ceramics: Three effects achieved simultaneously by controlling the amount of CaF2 additive

מידע ביבליוגרפי
Parent link:Journal of the European Ceramic Society.— .— Amsterdam: Elsevier Science Publishing Company Inc.
Vol. 46, iss. 9.— 2026.— Article number 118224, 11 p.
מחברים אחרים: Wei Ning, Xinxin Cao, Guifang Han, Kashkarov E. B. Egor Borisovich, Travitsky (Travitzky) N. Nakhum
סיכום:Title screen
This study explores the regulation of grain growth and sintering mechanism of self-toughening Si3N4 simply by controlling the amount of CaF2 added. CaF2 was transformed into CaO in-situ via its reaction with SiO2 on the surface of Si3N4. This simultaneously achieved three effects: inhibiting the secondary phase CaSiO3 generated easily by direct addition of CaO; in-situ generated CaO regulates the grain growth and densification of Si3N4 with high aspect ratio; formation of CaF2-CaO low viscosity liquid phase facilitates sintering and densification process. All these can be achieved by adjusting the amount of CaF2. The reaction mechanism of CaF2 as a novel sintering additive in Si3N4 ceramics was explored for the first time through thermodynamic theoretical calculation and phase diagram. This work provides a new combination method for the design and development of easy-to-control, efficient and cost-effective sintering additives for Si3N4 and other high temperature ceramics
Текстовый файл
AM_Agreement
שפה:אנגלית
יצא לאור: 2026
נושאים:
электронный ресурс
труды учёных ТПУ
Si3N4 ceramics
In-situ formation of CaO
CaF2-CaO liquid phase
Grain growth
Self-toughening
גישה מקוונת:https://doi.org/10.1016/j.jeurceramsoc.2026.118224
פורמט: אלקטרוני Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=685082

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