Atomistic investigation on the structure-property relationship during thermal spray nanoparticle impact.

Goel, Saurav; Faisal, Nadimul Haque; Ratia, Vilma; Agrawal, Anupam; Stukowski, Alexander

Abstract

During thermal spraying, hot particles impact on a colder substrate. This interaction of crystalline copper nanoparticles and copper substrate is modeled, using MD simulation. The quantitative results of the impacts at different velocities and temperatures are evaluated using a newly defined flattening aspect ratio. This ratio between the maximum diameter after the impact and the height of the splat increases with increasing Reynolds numbers until a critical value is reached. At higher Reynolds numbers the flattening aspect ratio decreases again, as the kinetic energy of the particle leads to increasing substrate temperature and, therefore, decreases the substrate resistance. Thus, the particle penetrates into the substrate and deforms less.

Citation

GOEL, S., FAISAL, N.H., RATIA, V., AGRAWAL, A. and STUKOWSKI, A. 2014. Atomistic investigation on the structure-property relationship during thermal spray nanoparticle impact. Computational materials science [online], 84, pages 163-174. Available from: https://doi.org/10.1016/j.commatsci.2013.12.011

• Journal Article Type: Article
• Acceptance Date: Dec 31, 2013
• Online Publication Date: Dec 31, 2013
• Publication Date: Mar 31, 2014
• Deposit Date: May 25, 2016
• Publicly Available Date: May 25, 2016
• Journal: Computational materials science
• Print ISSN: 0927-0256
• Electronic ISSN: 1879-0801
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 84
• Pages: 163-174
• DOI: https://doi.org/10.1016/j.commatsci.2013.12.011
• Keywords: Thermal spray coating; Molecular dynamics; Copper; Particle impact; Flattening aspect ratio
• Public URL: http://hdl.handle.net/10059/1486
• Contract Date: May 25, 2016