Laser Micro and Nano Drilling of Aluminium Alloy Using Tungsten Carbide and Silica Carbide Nanoparticles

Abstract

The micro and nano drilling holes are produced by a Q-switched Nd :YAG laser (1064 nm) interaction with 8009 Al alloy using two kinds of nanoparticles. Nanoparticles are tungsten carbide (WC) and silica carbide (SiC). The micro and nano holes have been investigated with different laser pulse energies (600, 700 and 800)mJ, different repetition rates (5Hz and 10Hz) and different concentrations of nanoparticles (90%, 50% and 5% ). The results indicate that micro and nano holes have been achieved under conditions of 600 mJ laser pulse energy, 5Hz laser repetition rate, and 5% concentration of the nanoparticles (for the two types of nanoparticles). The diameters of holes are increase to millimetres and cracks are formed with increasing of the laser pulse energy, laser repetition rate and high concentration of nanofluid.