Fig. 13. The remaining filling powder particles are eroded
by means of the continuous flowing atomizing gas and are
Fig. 12 SEM images showing the different zones of the heated electrodes in the TWAS process. (a) Traces of solidified liquid metal
flow, (b) solidified metal droplets, (c) solidified crust of metal liquid, (d) holes indicating bubbling effect of boiling metal, (e) Doughy
metal (erupted magma) building the extruded metal sheet, and (f) deformed wire tip
Fig. 13 Melting behavior and metal disintegration of (a) solid wire, and (b) cored wires
Journal of Thermal Spray Technology Volume 22(2-3) March 2013—361
Peer Reviewed
accelerated in the direction of gas flow. On their way, the
powder particles penetrate the extruded metal sheets and
cause the metal disintegrations near the parent wires. The
penetration consequently causes a breakup of the metal
sheet.