Surface modification of titanium by high intensity ultra-short Nd : YAG laser
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The effects of an Nd:YAG laser interaction with titanium target using laser radiation at wavelengths 1.064 or 0.532 mu m (40 picoseconds pulse duration) were studied. Modification of target surfaces at laser energy densities of 2.4 and 10.3 J/cm(2) (lambda(laser)(1) = 1.064 mu m) and 1.1 J/cm(2) (lambda(laser)(2) = 0.532 mu m) are reported in this article. Qualitatively, the titanium surface modification can be summarized as follows: (i) ablation of the titanium surface in the central zone of the irradiated area for both laser wavelengths; (ii) appearance of a hydrodynamic feature like resolidified droplets of the material (lambda(laser)(1) 1.064 mu m), as well as formation of the wave-like microstructures (lambda(laser)(2) = 0.532 mu m); and (iii) appearance of plasma, in front of the target, with both laser wavelengths.
Keywords:microscopy / picoseconds Nd : YAG laser / surface modification / titanium
Source:Materials Science Forum, 2006, 518, 167-172
- Recent Developments in Advanced Materials and Processes, 7th Conference of the Yugoslav-Materials-Research-Society (Yu-MRS), Sep 12-16, 2005, Herceg Novi, Montenegro