Influence of particle velocity on adhesion of cold-sprayed splats

Serge Guetta, M. H. Berger, F. Borit, V. Guipont, M. Jeandin, M. Boustie, Y. Ichikawa, K. Sakaguchi, K. Ogawa

Research output: Contribution to journalReview articlepeer-review

133 Citations (Scopus)


In cold spray, innovative coating process, powder particles are accelerated by a supersonic gas flow above a certain critical velocity. Particles adhesion onto the substrate is influenced by particle impact velocity, which can change dramatically depending on particle position from the core of the jet. In the present work, an original experimental set-up was designed to discriminate the particles as a function of the levels of velocity to investigate the influence of this parameter on adhesion. Particles at given positions could therefore be observed using scanning electron microscope, which showed different morphologies as a function of impact velocity. High pressure and temperature at the interface during impact were calculated from numerical simulations using ABAQUS®. Transmission electron microscope analyses of thin foils were carried out to investigate into resulting local interface phenomena. These were correlated to particle impact velocity and corresponding adhesion strength which was obtained from LAser Shock Adhesion Test.

Original languageEnglish
Pages (from-to)331-342
Number of pages12
JournalJournal of Thermal Spray Technology
Issue number3
Publication statusPublished - 2009


  • Adhesion
  • Cold spray
  • High-velocity impact
  • Numerical simulation
  • Splat


Dive into the research topics of 'Influence of particle velocity on adhesion of cold-sprayed splats'. Together they form a unique fingerprint.

Cite this