Surface modifications of TiN coating by pulsed ir lasers: tea CO2 and HF laser

Interactions of a pulsed Transversely Excited Atmospheric (TEA) CO2 and chemical HF laser with polycrystalline titanium nitride (TiN) coating deposited on high quality steel AISI 316, were studied. It was shown that both lasers, at energy densities of 43 J/cm2 and 38.6 J/cm2, induce morphological changes on the target. The HF laser produces more pronounced damage than the TEA CO2 laser. The energy absorbed from either of these lasers is mainly converted into thermal energy.Physical chemistry 2008 : 9th international conference on fundamental and applied aspects of physical chemistry; Belgrade (Serbia); 24-28 September 200