| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Ceramic Materials and Processing
|
| Presentation Title |
Novel multi-functional low temperature fabricated porous Si<sub>3</sub>N<sub>4</sub>-SiC composites for high-temperature applications |
| Author(s) |
Siddharth Siddharth, Prasanta Jana, Siddhartha Roy |
| On-Site Speaker (Planned) |
Siddharth Siddharth |
| Abstract Scope |
Porous Si<sub>3</sub>N<sub>4</sub>-SiC composites are versatile, used in industries like chemicals, nuclear power, automobiles, solar power, and defense. The fabrication of these advanced composites generally requires expensive raw materials and very high temperatures necessitating advanced sintering techniques, thereby making these materials very expensive. In this work, a novel technique for fabricating these porous composites at a low temperature of 1200°C using phosphoric acid both as a binder and pore former has been proposed. Two different Si<sub>3</sub>N<sub>4</sub>-SiC composites with different SiC particle sizes and varying SiC content have been fabricated. The operating sintering mechanism in the work can be succinctly described as the reaction between H<sub>3</sub>PO<sub>4</sub> and SiO<sub>2</sub>. A detailed study of the influence of the composites’ composition on their microstructure and mechanical properties has been carried out. The fabricated porous composites with 20 vol% fine SiC yield the optimum combination of stiffness and strength and behave as quasi-isotropic material. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Composites, Mechanical Properties |