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

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

Archives of Civil and Mechanical Engineering

2024

Vol. 24, no. 2

art. no. e101, 2024

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*m0.5 for the sample containing 20 wt. %.