首页|Atomistic investigation of pressure effects on sintering of bimetallic core-shell nanoparticles

Atomistic investigation of pressure effects on sintering of bimetallic core-shell nanoparticles

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Pressure-assisted sintering(PAS)utilizing bimetallic core-shell nanoparticles(CS NPs)has garnered widespread attention for its ability to produce advanced components with excellent thermal and elec-trical conductivities,even at low temperatures.This study presents the first investigation into the PAS of bimetallic CS NPs,using Ag-coated Cu material as a representative system,through all-atom molecu-lar dynamics(MD)simulations.The study provides detailed insights into the atomic-scale processes and mechanisms that govern pressure-assisted sintering,elucidating the coalescence phenomena and reveal-ing the significant influence of external pressure.By comparing atomistic behaviors,such as diffusion,migration,and microstructure evolution,between PAS and thermal sintering,a deeper understanding of the underlying mechanisms is achieved.Furthermore,the results highlight the importance of considering microstructural characteristics in addition to void fraction assessment for accurately estimating mechani-cal properties.This study enhances our understanding of sintering methods and offers a new perspective on designing process conditions in the PAS process.

Core-shell nanoparticlesPressure-assisted sinteringMolecular dynamics simulationMany-particle modelMicrostructureMechanical properties

Juheon Kim、Hayoung Chung

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Department of Mechanical Engineering,Ulsan National Institute of Science and Technology,50 Unist-gil,Ulsan 44919,South Korea

National R&D Program through the National Research Foundation of Korea(NRF)funded by Ministry of Science and ICTNational R&D Program through the National Research Foundation of Korea(NRF)funded by Ministry of Science and ICTNational Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)Human Resources Development of the Korea Insitute of Energy Technology Evaluation and Planning(KETEP)Korea government Ministry of Knowledge Economyregional specialized industry development program funded by Ministry of SMEs and StartupsSamsung Electronics Co.,Ltd

NRF-2020R1C1C1005741NRF-2021R1A4A1033224RS-2023-00257666RS-2023-00240918S3365135IO221007-02753-01

2024

10.1016/j.jmst.2023.10.018

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.184(17)
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