Depth profiling characterisation of the surface layer obtained by pulsed Nd:YAG laser irradiation of titanium in nitrogen

György, E.; Pino, A. Pérez del; Serra, P.; Morenza, J.L.

doi:10.1016/s0257-8972(03)00520-6

Cited by 172 publications

(99 citation statements)

References 27 publications

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“…The same effect was observed in a previous study by Gyö rgy. 10 A mathematical description of these profiles can be given by a superposition of two complementary error function profiles (solutions of diffusion equation). The boundary conditions were assumed to be constant with three concentrations, c 0 , c l , and c s .…”

Section: X-ray Diffractometrymentioning

confidence: 99%

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TiN-coating formation by pulsed Nd:YAG laser irradiation of titanium in nitrogen

et al. 2008

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Titanium was treated by pulsed Nd:YAG laser irradiation in nitrogen atmosphere, which led to nitrogen in-diffusion and TiN coating formation. The thickness of the TiN films was about 1.2 lm and the coatings had a universal hardness of about 11 GPa. The layers were investigated by X-ray diffraction at grazing incidence and resonant nuclear reaction analysis for nitrogen depth profiling. Fitting of the experimental depth profiles gave information about the physical processes (diffusion time and depth) with respect to the achieved hardness. The microscopic properties like lattice constants and the variation of the nitrogen content were evaluated. A relationship between laser scan parameters and coating properties could be revealed. Thus, it was possible to determine the physical limits such as film thickness, nitrogen content, and hardness of this direct laser synthesis.

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Section: X-ray Diffractometrymentioning

confidence: 99%

“…[3][4][5] Previous works showed the successful synthesis of titanium nitride coatings. [6][7][8] Extensive investigations were done by Mori 9 and Gyö rgy 10,11 by means of pulsed Nd:YAG laser irradiation. The advantage of this method is that the processing time is reduced down to some seconds per cm 2 sample area.…”

Section: Introductionmentioning

confidence: 99%

TiN-coating formation by pulsed Nd:YAG laser irradiation of titanium in nitrogen

et al. 2008

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“…One of the most important issues is whether the nitrogen is incorporated by the titanium lattice substitutionally or interstitially [16] modifying its performance as electrode drastically as well as outstanding oxidation behaviors and corrosion resistance [17,18]. Although there is a lot of literature [19][20][21][22] no consensus among the reports on the state of doped nitrogen in N-TiO 2 has been established. A detailed investigation of the thermal reactions between ammonia and titanium will provide valuable information about the related nitrogen incorporation in titanium, which produces the formation of TiN x and TiO x-2 N x from TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Exploring the incorporation of nitrogen in titanium and its influence on the electrochemical corrosion resistance in acidic media

et al. 2016

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The role of the nitrogen incorporation into titanium, its chemical nature, the location in the titanium lattice and its electrochemical performance were investigated by a combination of several spectroscopy and microscopy techniques using samples prepared by CVD of NH 3 at different temperatures and successive electrochemically tested in 1 M of HClO 4 . We found that nitrogen is incorporated in either the interstitial or substitutional site of the lattice depending on the preparation temperature modifying strongly its corrosion resistance which was ascribed to the N 2p hybridization with the Ti 3d orbitals. It was found that at low temperature the N 2p orbitals were more likely to hybridize with Ti 3d -t 2g orbitals while higher temperature favours the hybridization with the Ti 3d -e g orbitals. This is responsible for the corrosion resistance shown by the samples prepared at higher temperature.

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“…Since the nitrogen content of NA-165 prepared under N2 using HNO3 as catalyst is higher than that of HA-165 prepared under N2 via the similar method under N2 but using HCl instead of HNO3 as catalyst, it implied that the nitrogen source in NA-165 may be from both N2 and HNO3 [22,32]. The O 1s XPS spectra of NA-165 shown in Figure 3c displays two peaks at 530.2 and 531.8 eV, which was attributed to the Ti-O bond and Ti-O-N or Ti-N-O, respectively [33]. The XPS results along with XRD patterns and HRTEM images reveal that nitrogen-doped anatase/brookite biphasic nanoparticles were successfully synthesized.…”

Section: Syntheses and Characterizationsmentioning

confidence: 98%

Low-Temperature Sol-Gel Synthesis of Nitrogen-Doped Anatase/Brookite Biphasic Nanoparticles with High Surface Area and Visible-Light Performance

Jiang

Yang

et al. 2017

Catalysts

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Nitrogen doping in combination with the brookite phase or a mixture of TiO 2 polymorphs nanomaterials can enhance photocatalytic activity under visible light. Generally, nitrogendopedanatase/brookite mixed phases TiO 2 nanoparticles obtained by hydrothermal or solvothermal method need to be at high temperature and with long time heating treatment. Furthermore, the surface areas of them are low (<125 m 2 /g). There is hardly a report on the simple and direct preparation of N-doped anatase/brookite mixed phase TiO 2 nanostructures using sol-gel method at low heating temperature. In this paper, the nitrogen-doped anatase/brookite biphasic nanoparticles with large surface area (240 m 2 /g) were successfully prepared using sol-gel method at low temperature (165 • C), and with short heating time (4 h) under autogenous pressure. The obtained sample without subsequent annealing at elevated temperatures showed enhanced photocatalytic efficiency for the degradation of methyl orange (MO) with 4.2-, 9.6-, and 7.5-fold visible light activities compared to P25 and the amorphous samples heated in muffle furnace with air or in tube furnace with a flow of nitrogen at 165 • C, respectively. This result was attributed to the synergistic effects of nitrogen doping, mixed crystalline phases, and high surface area.

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Depth profiling characterisation of the surface layer obtained by pulsed Nd:YAG laser irradiation of titanium in nitrogen

Cited by 172 publications

References 27 publications

TiN-coating formation by pulsed Nd:YAG laser irradiation of titanium in nitrogen

TiN-coating formation by pulsed Nd:YAG laser irradiation of titanium in nitrogen

Exploring the incorporation of nitrogen in titanium and its influence on the electrochemical corrosion resistance in acidic media

Low-Temperature Sol-Gel Synthesis of Nitrogen-Doped Anatase/Brookite Biphasic Nanoparticles with High Surface Area and Visible-Light Performance

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