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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Ultrafine-Grained and Heterostructured Materials (UFGH) XIV
Presentation Title Tunable Glass-Glass Interfaces in Metallic-Glass Nanoparticle Assemblies for Ultrafine Heterostructured Materials
Author(s) Paulo Branicio, Prashil Joshi, Xuezhen Ren, Suyue Yuan, Emily J Gurniak
On-Site Speaker (Planned) Paulo Branicio
Abstract Scope Metallic‑glass nanoparticles (MG‑NPs) provide a versatile bottom‑up route for fabricating ultrafine‑grained, heterostructured nanoglasses with size‑tunable glass‑glass interfaces (GGIs). Large‑scale molecular‑dynamics simulations on Cu64Zr36 MG‑NPs ranging 1-20 nm reveal Cu‑enriched surface layers whose thickness and associated glass‑transition elevation scale monotonically with particle size. Hot‑pressing monodisperse 7 nm particles at 9 GPa and 50 K generates fully dense structures where Cu‑rich GGIs partition equiaxed amorphous grains, suppressing residual porosity. Extending the concept to 3-15 nm blends yields gradient nanoglasses in which GGI thickness, chemistry, and core density vary smoothly, encoding hierarchical heterogeneity without post‑processing. Atomic‑level analysis shows pressure‑driven Cu atoms migrate to fill interparticle voids and concentrate at triple junctions, whereas Zr remains core‑bound, establishing explicit design rules that couple particle‑size distribution with consolidation pressure. MG‑NP‑derived nanoglasses thus emerge as model ultrafine heterostructured materials whose load-bearing architectures are fully designable from first principles, furnishing a foundational platform for systematically correlating engineered interface motifs with mechanical response.
Proceedings Inclusion? Planned:
Keywords Modeling and Simulation, Computational Materials Science & Engineering, Powder Materials

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