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

Juheon Kim ¹Hayoung Chung¹

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作者信息

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

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.

Key words

Core-shell nanoparticles/Pressure-assisted sintering/Molecular dynamics simulation/Many-particle model/Microstructure/Mechanical properties

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基金项目

National R&D Program through the National Research Foundation of Korea(NRF)funded by Ministry of Science and ICT(NRF-2020R1C1C1005741)

National R&D Program through the National Research Foundation of Korea(NRF)funded by Ministry of Science and ICT(NRF-2021R1A4A1033224)

National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(RS-2023-00257666)

Human Resources Development of the Korea Insitute of Energy Technology Evaluation and Planning(KETEP)()

Korea government Ministry of Knowledge Economy(RS-2023-00240918)

regional specialized industry development program funded by Ministry of SMEs and Startups(S3365135)

Samsung Electronics Co.,Ltd(IO221007-02753-01)

出版年

2024

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

参考文献量72

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