Diffusion bonding of Cu atoms with molecular dynamics simulations

Show full item record




Xydou , A , Parviainen , S & Djurabekova , F 2020 , ' Diffusion bonding of Cu atoms with molecular dynamics simulations ' , Results in physics , vol. 16 , 102890 . https://doi.org/10.1016/j.rinp.2019.102890

Title: Diffusion bonding of Cu atoms with molecular dynamics simulations
Author: Xydou, A.; Parviainen, S.; Djurabekova, F.
Contributor organization: Helsinki Institute of Physics
Department of Physics
Date: 2020-03
Language: eng
Number of pages: 8
Belongs to series: Results in physics
ISSN: 2211-3797
DOI: https://doi.org/10.1016/j.rinp.2019.102890
URI: http://hdl.handle.net/10138/317315
Abstract: Diffusion bonding of copper disks is an important step during the assembly of accelerating structures -the main components of power radio-frequency linear accelerators-. During the diffusion bonding copper disks are subjected to pressure at high temperatures. Finding the optimal combination of pressure and temperature will enable an accurate design of manufacturing workflow and machining tolerances. However, required optimization is not possible without good understanding of physical processes developed in copper under pressure and high temperature. In this work, the combined effect of temperature and pressure on closing time of inter-granular voids is examined by means of molecular dynamics simulations. In particular, a nano-void of 3.5–5.5 nm in diameter representing a peak and a valley of surface roughness facing each other was inserted between identical copper grains. The simulations performed at T = 1250 K, the temperature used in experimental condition, and the 300–800 MPa pressure range indicated the dislocation-mediated enhancement of atomic diffusion leading to full void closure.
Subject: CLIC
Molecular dynamics
Diffusion bonding
High temperature
114 Physical sciences
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: publishedVersion

Files in this item

Total number of downloads: Loading...

Files Size Format View
1_s2.0_S2211379719330116_main.pdf 4.195Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record