3. Results
The melting behavior of the feedstock in TWAS is a
controlling factor in process performance. The type of the
wires used affects directly the process stability. Two kinds
of forces impact simultaneously on the wire tips in the
TWAS process. The first one is the continuously operating
aerodynamic force applied by the primary atomization gas
pressure. The other one is the alternating heating caused
by a fluctuating electrical arc because of the material
removal from the wire tips by means of the atomization
gas and the continuous feeding of the wire into the arc
zone. The extinction and re-ignition of the arc occurred
periodically in milliseconds (Ref 14).