The consolidation of SiC ceramics using MAX phases as a new family of sintering activators

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发表日期：

2024年4月7日

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Jaroslaw Wozniak,
Mateusz Petrus,
Dorota Moszczynska,
Artur Lachowski,
Tomasz Cygan,
Kamil Broniszewski,
Andrzej Olszyna

摘要

This paper discusses the influence of Ti₃AlC₂—MAX phase addition, intended to act as a sintering activator and a strengthening phase, to silicon carbide. The composites are prepared via powder processing and consolidated using the spark plasma sintering (SPS) method. The effects of the Ti₃AlC₂ addition on microstructure, sinterability, and mechanical properties were evaluated. The addition of MAX phases allows for the production of high-density sinters containing TiC as the reinforcing phase. Titanium carbide is formed as a result of the thermal degradation of Ti₃AlC₂. The highest hardness of 2540 HV5 was obtained for a sample containing 15 wt. % of Ti₃AlC₂, while the highest fracture toughness of 4.15 MPa*m^0.5 for the sample containing 20 wt. %.