The 9th International Conference on Multiscale Materials Modeling

講演情報

Symposium

I. Multiscale Modeling of Grain Boundary Dynamics, Grain Growth and Polycrystal Plasticity

[SY-I4] Symposium I-4

2018年10月30日(火) 11:15 〜 12:30 Room7

Chairs: Shen J Dillon(University of Illinois, USA), Daniel Pino Munoz(Mines ParisTech / PSL Research University, France)

[SY-I4] Multiscale simulation of solid phase sintering of nano copper powder

Xinyu Zhu, Xiangge Qin (School of Materials Science and Engineering, Jiamusi Univ., China)

Powder metallurgy is a processing technology that uses metal powder compacts to produce near net shape parts through sintering and is suitable for mass production. Quantitative prediction of microstructure evolution and sintering kinetics during powder sintering is of great significance for understanding the sintering mechanism and optimizing the sintering process.

In this paper, the packing structure model of nano copper particles was established using the discrete element method as a powder compact. The solid phase sintering of the powder compact was studied by molecular dynamics simulation using embedded atom method. The sintering mechanism and densification kinetics of the nano powders were analyzed and compared with the experimental results. The effects of diffusion mechanism and grain growth on the sintering densification process are discussed in detail.

Keywords: powder sintering, diffusion, grain growth, discrete element, molecular dynamics