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

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

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)
351 Downloads (Pure)

Abstract

During thermal spraying, hot particles impact on a colder substrate. This interaction of crystalline copper nanoparticles and copper substrate is modelled, 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
Number of pages12
JournalComputational Materials Science
Volume84
Early online date31 Dec 2013
DOIs
Publication statusPublished - Mar 2014

Keywords

  • Thermal spray coating
  • MD simulation

ASJC Scopus subject areas

  • Materials Science(all)
  • Chemistry(all)
  • Computer Science(all)
  • Physics and Astronomy(all)
  • Computational Mathematics
  • Mechanics of Materials

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