Atomistic investigation on the structure-property relationship during thermal spray nanoparticle impact.
Goel, Saurav; Faisal, Nadimul Haque; Ratia, Vilma; Agrawal, Anupam; Stukowski, Alexander
Doctor Nadimul Faisal N.H.Faisal@rgu.ac.uk
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.
|Journal Article Type||Article|
|Publication Date||Mar 31, 2014|
|Journal||Computational materials science|
|Peer Reviewed||Peer Reviewed|
|Institution 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|
|Keywords||Thermal spray coating; Molecular dynamics; Copper; Particle impact; Flattening aspect ratio|
GOEL 2013 Atomistic investigation