About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advancements in Lightweight Composites, Materials & Alloys
|
| Presentation Title |
In-Situ Synthesis of New Aluminium-Boride Composites by Laser Powder Bed Fusion Using a Ball-Milled Precursor Powders |
| Author(s) |
Baptiste Forget, Laurent Chaffron, Mathieu Soulier, Camille Flament, Thierry Baffie, Jérôme Andrieux, Olivier Dezellus |
| On-Site Speaker (Planned) |
Baptiste Forget |
| Abstract Scope |
Aluminum Matrix Composites (AMCs) reinforced with borocarbides exhibit mechanical properties comparable to benchmark AMCs such as Al-TiC or Al-SiC, but with lower densities. However, they face challenges due to the reactivity between B4C and aluminum at temperatures below 2177°C, leading to damage and the formation of weakening phases. In-situ synthesis, particularly global reactive synthesis, holds promise for enhancing mechanical properties compared to traditional methods due to its ability to synthesize matrix and reinforcement simultaneously. Dezellus et al. introduced Al-Al3B48C2 AMC via the peritectic decomposition of AlB2 at 1400°C: 24AlB2+2C→Al3B48C2+21Al. However, this approach limits complex part shaping. This study explores a novel synthesis route to produce this AMC using Laser Powder Bed Fusion (LPBF). Thus, an AlB2-C nanostructured precursor powder suitable for LPBF is produced through ball-milling and high-shear-mixed with aluminum. The resulting AMCs underwent comprehensive analysis, yielding a range of compositions from Al-(Al3B48C2)48% to Al-nano(AlB2)10%, exhibiting promising mechanical properties. |