In-situ synthesized cBN reinforced M3AX2 phase composites
Materials Chemistry and Physics, cilt.363, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 363
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.matchemphys.2026.132790
- Dergi Adı: Materials Chemistry and Physics
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: cBN, In-situ synthesis, MAX phases, Spark plasma sintering, Ti3SiC2
- Eskişehir Osmangazi Üniversitesi Adresli: Evet
Özet
In this study, high-purity cubic boron nitride (cBN) added in-situ synthesized silicon carbide/titanium silicon carbide (SiC/Ti3SiC2) composite materials were successfully fabricated via Spark Plasma Sintering (SPS) method for the first time. The influence of sintering parameters on phase evolution, mechanical properties and tribological performance was systematically investigated. It was determined that a sintering temperature of 1350 °C at 50 MPa provides the optial balance for Ti3SiC2 stability; whereas increasing the pressure accelerates diffusion kinetics, shifting the system toward thermodynamic equilibrium and promoting the transformation of the MAX phase into more persistent secondary phases. The incorporation of even 5 wt% cBN significantly enhanced the mechanical properties, resulting in a Vickers hardness of 10.86 ± 0.59 GPa, which represents a 48% increase compared to the monolithic matrix. Tribological evaluations revealed that the 15 wt% cBN composite achieved a minimum wear rate of 1.58 × 10−5 mm3/Nm, accounting for an 87.75% reduction relative to the SiC/Ti3SiC2 matrix. These results highlight the critical interplay between pressure-induced diffusion and thermodynamic stability in tailoring the performance of ultra-hard MAX phase composites.