| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advancements in Lightweight Composites, Materials & Alloys
|
| Presentation Title |
Enhancing the Strength of Aluminum-Boron Carbide Composites to a High Degree by
Magnesium Addition for Use in Automotive Applications |
| Author(s) |
Ramasis Goswami, Alex Moser |
| On-Site Speaker (Planned) |
Ramasis Goswami |
| Abstract Scope |
We report here a significant enhancement of the hardness of aluminum boron carbide composites by the addition of magnesium. Reactive sintering between boron carbide and aluminum-magnesium occurs by the application of heat and pressure and during subsequent annealing at high-homologous temperatures of the matrix. In this case, the deformation-induced plastic yielding enables the incorporation and dispersion of hard particles in aluminum-matrix. We observe aluminum-magnesium-boride, AlMgB4, and aluminum-boro-carbide, Al3BC, phases at boron carbide/matrix interfaces as revealed by the high-resolution transmission electron microscopy. We demonstrate that the hardness of these composites has been enhanced by two to five folds as compared to the base alloy and the existing aluminum-boron carbide composites. The addition of
magnesium improves interfacial cohesion significantly between the matrix and ceramic particles as a result of interfacial boride phase, and primarily contributes to the enhancement of strength. |