Single-pulse drilling study on Au, Al and Ti alloy by using a picosecond laser

Effects of laser operating parameters on metals micromachining with ultrafast lasers

“…An internal attenuator, software controlled, was used to vary the output pulse energy. A schematic of the experimental set-up could be found elsewhere [17]. In both laser systems, the output beams were directed to scanning galvanometers with 100 mm f-theta focal lenses (Nutfield).…”

Thermal boundary conductance of transition metals on diamond

“…Another good method would be to use acoustic echos from TDTR signal (Stoner and Maris 1993;Thompsen et al, 1986), but it has two drawbacks that make an independent measurement useful in our view: (a) if the metallic layer is strongly textured, which is often the case, the speed of sound in it will take the value characteristic for the prominent crystallographic direction and hence may necessitate an additional texture analysis and (b) if the adhesion to the substrate is very strong and the change of acoustic impedance is low, acoustic echos are very dif cult to detect due to high damping even of the rst re ection at the metal/ diamond interface (Tas et al, 1998). To measure thicknesses, FIB cross-sections in the sample were made and the resulting pro le was measured by standard Scanning Electron Microscopy, for example, (Cheng et al, 2009). Corrections have to be made to account for the 54° angle between the electron and ion beam (Uchic et al, 2007).…”

Comparison of the simulation and experimental of hole characteristics during nanosecond-pulsed laser drilling of thin titanium sheets

“…Masmiati and Philip [13] planned experiments on drilling thermoplastic polymers. Perrie et al [14] studied single-pulse drilling on Au, Al, and Ti alloys using a picosecond laser. Numerical simulation is the most widely used method to study temperature fields and material removal during laser drilling.…”