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An efficient small scale TEA CO2 laser for material surface modification

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Authors
Trtica, Milan
Gaković, Biljana M.
Radak, Bojan
Miljanic, SS
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Abstract
An efficient small scale TEA (Transversely Excited Atmospheric) CO2 laser has been considered, The laser was a low flowing, UV preionized, pulsed system. Specific design of the head as well as the electrical circuit ensure the laser operation with high efficiency and reliability. Nonconventional CO2/Y, Y = N-2/H-2; H-2/He and H-2 gas mixtures showed relatively high energy output. CO2/N-2/H-2 mixture as the most superior one produces output energy and peak power of 220 mJ and 1.40 MW, respectively. High-energy output of the laser was employed for surface modification of austenitic stainless steel AISI 3 16 and titanium nitride (TiN) coating deposited on the same steel substrate. Used laser peak power densities of 100 and 170 MW/cm(2) have induced the morphology changes of AISI 316 steel and TiN coating, respectively.
Keywords:
gas laser / pulsed carbon-dioxide system / surface modifications (steel / TiN coating)
Source:
2002, 4747, 44-49
Note:
  • Proceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE), International Conference on Atomic and Molecular Pulsed Lasers IV, Sep 10-14, 2001, Tomsk, Russia

DOI: 10.1117/12.460156

ISSN: 0277-786X (print)

WoS: 000176068900006

Scopus: 2-s2.0-0036409421
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http://vinar.vin.bg.ac.rs/handle/123456789/6331
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Vinča

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