Oxidation and Carbidation of Laser-Ablated Amorphized Ti Particles in Carbon Monoxide

0390930 - ÚCHP 2014 RIV NL eng J - Journal Article
Jandová, Věra - Kupčík, Jaroslav - Bastl, Zdeněk - Šubrt, Jan - Pola, Josef
Oxidation and Carbidation of Laser-Ablated Amorphized Ti Particles in Carbon Monoxide.
Solid State Sciences. Roč. 19, MAY (2013), s. 104-110. ISSN 1293-2558. E-ISSN 1873-3085
Institutional support: RVO:67985858 ; RVO:61388980 ; RVO:61388955
Keywords : titanium * laser ablation * amorphization
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 1.679, year: 2013

IR laser ablation of hexagonal titanium in vacuum leads to amorphization of ablated Ti particles and when carried out in gaseous carbon monoxide it proceeds as reactive ablation involving particles amorphization, oxidation and carbidation. The films deposited in vacuum and in the presence of CO were examined by Fourier transform infrared, Raman and X-ray photoelectron spectroscopy, X-ray and electron diffraction and electron microscopy. The Ti films become oxidized upon contact with air and the Ti/C/O films are composed of Ti-O, Ti C and C-O bonds-containing structures with Ti in Ti2+-Ti4+ state and incorporating crystalline rutile and elemental carbon. The ablation in vacuum represents a new approach to amorphous titanium and it is judged that hot ablated Ti particles are modified by reactions with CO decomposition products into amorphous Ti oxycarbides which undergo rapid post-pulse amorphization.
Permanent Link: http://hdl.handle.net/11104/0220990