Physics – Condensed Matter – Materials Science
Scientific paper
2009-10-24
Physics
Condensed Matter
Materials Science
Scientific paper
Stainless steel particles (60 $\mu$m in mean diameter) cladded with an alumina shell (2 $\mu$m thick and manufactured by mechanofusion) were sprayed with an Ar-H2 (53-7 slm) d.c. plasma jet (I = 500 A, P = 28 kW, \rho_th = 56 %). Two main types of particles were collected in flight, as close as 50 mm downstream of the nozzle exit: particles with a steel core with pieces of alumina unevenly distributed at their surface and those consisting of a spherical stainless steel particle with an alumina cap. The plasma flow was modeled by a 2D steady parabolic model and a single particle trajectory by using the 3D Boussinesq-Oseen-Basset equation. The heat transfer, within the two-layer, stainless steel cladded by alumina, particle, considered the heat propagation phenomena including phase changes. The models allowed determining the positions, along the particle trajectory, where the convective movement could occur as well as the entrainment of the liquid oxide to the leading edge of the in-flight particles. The heat transfer calculations showed the importance of the thermal contact resistance TCR between alumina and steel.
Ageorges Hélène
Bouneder Mohamed
Elganaoui Mohamed
Fauchais Pierre
Pateyron Bernard
No associations
LandOfFree
Direct current plasma spraying of mechanofused alumina-steel particles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Direct current plasma spraying of mechanofused alumina-steel particles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct current plasma spraying of mechanofused alumina-steel particles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-211788