About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Molecular Approaches to Ceramics; Synthesis, Processing, Modeling, and Derived Ceramics
|
| Presentation Title |
Phase Evolution Study of Polymer Derived SiC and TiC-SiC Composites Under Ultrafast Heating |
| Author(s) |
Kishore Behera, Kathy Lu, Kartik Nemani, Shilpa Cholayil |
| On-Site Speaker (Planned) |
Kishore Behera |
| Abstract Scope |
Polymer-derived ceramics (PDCs) have attracted great attention for high-temperature sensing and structural applications because of their thermal stability, oxidation resistance, and ability to form high entropy compositions from liquid polymer precursors. In this work, ultrafast high-temperature heating has been used to study the phase evolution of SMP-10-derived SiC and SMP-10 derived SiC/Ti3C2Tx MXene composites. The materials are processed at temperatures between 1100 and 2000 °C using Joule-heated carbon felt, where the target temperatures are reached within seconds. Ti3C2Tx flakes are preserved within the amorphous SiC matrix up to 1300 °C, where they act as heterogenous nucleation sites for β-SiC crystallization. At 1600 °C, MXene undergoes topotactic conversion into TiC platelets surrounded by SiC grains, and at 2000 °C, a β-SiC/TiC nano composite is formed. The ultrafast heating suppresses MXene decomposition up to temperature 1300 °C and forms novel TiC-SiC composites within seconds from polymer derived ceramic precursor. |