About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Uncertainty Quantification in Ultra-High Temperature Materials Manufacturing
|
| Presentation Title |
MXene and Polymer Derived TiC–SiC Ceramics with Enhanced Electrical Conductivity and Tailored Thermal–Mechanical Performance for High-Temperature Applications |
| Author(s) |
Kathy Lu, Mubina Shaik, Kishore Behera |
| On-Site Speaker (Planned) |
Kathy Lu |
| Abstract Scope |
TiC–SiC ceramic composites were synthesized via incorporation of Ti₃C₂ MXene into allylhydridopolycarbosilane (SMP-10), followed by pyrolysis and spark plasma sintering (SPS) at 2000 °C. Phase analysis reveals the formation of β-SiC, substoichiometric TiCₓ phases, and turbostratic carbon. The incorporation of Ti₃C₂ leads to a dramatic enhancement in electrical conductivity, reaching 645 S·cm⁻¹ at 1000 °C for the 10TiC–SiC composition—approximately two orders of magnitude higher than that of pure SMP-10-derived SiC and exceeding values reported for other polymer-derived ceramics (PDCs). Thermal conductivity decreases with increasing temperature for all compositions. Hardness and elastic modulus increase systematically with TiC content, reflecting the evolving composite microstructure. In addition, high-temperature oxidation studies demonstrate good phase stability with limited microstructural degradation. These findings suggest that Ti₃C₂-derived TiCₓ and carbon networks enable simultaneous enhancement of electrical conductivity and controlled thermal transport while maintaining robust mechanical properties and oxidation resistance. |