About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
|
Presentation Title |
Multi Principal Element Borides from Amorphous Colloidal Nanoparticles |
Author(s) |
Melody Wang, Mehrdad Kiani, Brandon Lum, Wendy Gu |
On-Site Speaker (Planned) |
Melody Wang |
Abstract Scope |
Multi principal element (MPE) alloys, amorphous metals and ceramics can have high strength, toughness and hardness. Here, we present a colloidal synthesis route to MPE amorphous metal nanoparticles and their crystallized multi-metal boride counterparts. CoNiB and CoFeNiB amorphous metal nanoparticles of ~100 nm in diameter are fabricated. The elemental composition is characterized using TEM EDS, which shows a higher concentration of nickel at the outer surface and remaining metals within the core. The particles are crystallized via annealing in inert gas and characterized using XRD. These particles are then sintered under heat and pressure into millimeter-scale, nanocrystalline multi-metallic borides. Mechanical tests will be performed via nanoindentation and micropillar compressions to determine elastic modulus, hardness, yield strength and ductility. The mechanical properties of individual amorphous metal and crystalline boride nanoparticles are also determined using in-situ SEM compression tests. These properties are related to the core shell structure and nanoscale chemical heterogeneities. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Copper / Nickel / Cobalt, High-Entropy Alloys |