Laser Annealed Ni(Ti) Silicides Formation

Abstract

Effect of Ti alloying during both RTA and LTA on Ni silicide formation is studied. In the RTA annealed samples, Ni3Si2 was found to be the first silicide formed at 600degC and stable up to 900degC. On the other hand, unique triple layer microstructures were found in the sample after single-pulsed LTA at high laser fluence. Ti rapidly segregates from the alloy melt and forms a protective TiOx overlayer on the surface during rapid solidification