TY - JOUR
T1 - One-dimensional analytical model for oxide thin film growth on Ti metal layers during laser heating in air
AU - Jiménez Pérez, J. L.
AU - Sakanaka, P. H.
AU - Algatti, M. A.
AU - Mendoza-Alvarez, J. G.
AU - Cruz Orea, A.
N1 - Funding Information:
The authors would like to thank CNPq and FAPESP for the financial support. J.L.J.P. would like to thank CONACYT for the Ph.D. scholarship.
PY - 2001/5/15
Y1 - 2001/5/15
N2 - This paper presents the theoretical and experimental results for oxide thin film growth on titanium films previously deposited over glass substrate. Ti films of thickness 0.1 μm were heated by Nd:YAG laser pulses in air. The oxide tracks were created by moving the samples with a constant speed of 2 mm/s, under the laser action. The micro-topographic analysis of the tracks was performed by a microprofiler. The results taken along a straight line perpendicular to the track axis revealed a Gaussian profile that closely matches the laser's spatial mode profile, indicating the effectiveness of the surface temperature gradient on the film's growth process. The sample's micro-Raman spectra showed two strong bands at 447 and 612 cm -1 associated with the TiO 2 structure. This is a strong indication that thermo-oxidation reactions took place at the Ti film surface that reached an estimated temperature of 1160 K just due to the action of the first pulse. The results obtained from the numerical integration of the analytical equation which describes the oxidation rate (Wagner equation) are in agreement with the experimental data for film thickness in the high laser intensity region. This shows the partial accuracy of the one-dimensional model adopted for describing the film growth rate.
AB - This paper presents the theoretical and experimental results for oxide thin film growth on titanium films previously deposited over glass substrate. Ti films of thickness 0.1 μm were heated by Nd:YAG laser pulses in air. The oxide tracks were created by moving the samples with a constant speed of 2 mm/s, under the laser action. The micro-topographic analysis of the tracks was performed by a microprofiler. The results taken along a straight line perpendicular to the track axis revealed a Gaussian profile that closely matches the laser's spatial mode profile, indicating the effectiveness of the surface temperature gradient on the film's growth process. The sample's micro-Raman spectra showed two strong bands at 447 and 612 cm -1 associated with the TiO 2 structure. This is a strong indication that thermo-oxidation reactions took place at the Ti film surface that reached an estimated temperature of 1160 K just due to the action of the first pulse. The results obtained from the numerical integration of the analytical equation which describes the oxidation rate (Wagner equation) are in agreement with the experimental data for film thickness in the high laser intensity region. This shows the partial accuracy of the one-dimensional model adopted for describing the film growth rate.
KW - Laser materials processing
KW - Laser-induced oxidation
KW - Thin oxide films
UR - http://www.scopus.com/inward/record.url?scp=16644370473&partnerID=8YFLogxK
U2 - 10.1016/S0169-4332(01)00144-1
DO - 10.1016/S0169-4332(01)00144-1
M3 - Artículo
SN - 0169-4332
VL - 175-176
SP - 709
EP - 714
JO - Applied Surface Science
JF - Applied Surface Science
ER -