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

S. Goel (Corresponding Author), N.H. Faisal, V. Ratia, A. Agrawal, A. Stukowski

Research output: Contribution to journalArticleScientificpeer-review

17 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)163-174
JournalComputational Materials Science
Volume84
DOIs
Publication statusPublished - Mar 2014
MoE publication typeA1 Journal article-refereed

Keywords

  • Thermal spray coating
  • Molecular dynamics
  • Copper
  • Particle impact
  • Flattening aspect ratio

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