| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Composite Materials: Sustainable and Eco-Friendly Material Development and Applications
|
| Presentation Title |
Achieving High Hardness in Metal-Ceramic Composites and Multilayers |
| Author(s) |
Ramasis Goswami, Alex Moser |
| On-Site Speaker (Planned) |
Ramasis Goswami |
| Abstract Scope |
Materials with hard ceramic particles in soft matrices have been manufactured to enhance the strength for applications at elevated temperatures. We report a significant enhancement in hardness in Fe-B4C and Al-B4C composites manufactured using a pressure assisted reactive sintering process, and in Al-Al2O3 multilayered films. The hardness level in Fe-B4C composites reaches up to 13GPa and 18 GPa with the addition of 10 and 20 wt. % B4C, respectively, while the hardness without B4C is 5GPa. The decomposition of B4C takes place during sintering, which releases boron and carbon and is exothermic in nature, and produces a Fe-based composite containing complex boride and carbide with a softer fcc-Fe matrix. The deformation-induced plastic yielding enables the incorporation of hard particles in aluminum matrix for Al-B4C composites. In this presentation, we will discuss the mechanisms of the enhancement of mechanical properties, and correlate with the microstructure in composites and multilayers. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, High-Temperature Materials, Characterization |