The effect of type of liquid-phase sintering additives on physical and mechanical properties of SiC ceramics.

E. S. Tverdokhleb (Antonova), N. A. Golubeva, M. G. Lisachenko

2025

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DOI 10.17073/1683-4518-2024-11-42-45
Data confidence 70 medium
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Abstract

Горячим прессованием получена керамика на основе карбида кремния с использованием в качестве спекающих добавок соединений алюминия (Al 2 O 3 или AlN) и оксидов редкоземельных элементов (Lu 2 O 3 , Er 2 O 3 ). Исследовано влияние вида спекающей добавки на механические свойства, микроструктуру и фазовый состав керамики на основе карбида кремния. Получены керамические материалы на основе карбида кремния с пределом прочности при изгибе 671 МПа при комнатной температуре и 386МПа при 1600 °С, трещиностойкостью 5,4 МПа·м 1/2 , твердостью 26 Гпа.