Abstract
In recent years, the influence of pulsed laser interaction with material has become a research hotspot. The micromachining of polycrystalline diamond with pulsed laser is a very important research direction. This study scrutinized the ablation threshold and chemical modification of PCD irradiated by UV nanosecond laser, which were not investigated before. Irradiated a bulk PCD in air using a UV nanosecond laser source to perform multi-pulse processing at a wavelength of 355nm. Based on the linear relation between the laser pulse energy density with crater diameter the Gaussian distribution of the laser intensity on the cross-section the ablation threshold of PCD was determined to be about 3.7326 J/cm2. And also investigated that the photochemical processing of UV nanosecond laser irradiation of PCD the sp3 structure transforms to the sp2 graphite phase. So, this study contributes a theoretical and experimental reference for the UV nanosecond laser micromachining of PCD material in research and manufacturing industries.
Ablation Threshold Measurement and Chemical Modification of UV Nanosecond Laser Micromachining of Polycrystalline Diamond
