Study of the TiC1-x – TiO2 reactive interface

Réjasse, Florian; Trolliard, Gilles; Léchelle, J.; Rapaud, Olivier; Carlès, Pierre; Grauby, Olivier; Khodja, H.

doi:10.1016/j.actamat.2017.12.055

Cited by 14 publications

(4 citation statements)

References 33 publications

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“…Some researchers [35][36][37][38] have shown that the higher accumulated laser fluency, the higher degree of oxidation, i.e., with high oxygen diffusion, the more the samples will trap oxygen in the melted phase. It has also been reported that TiC could be easily oxidized forming TiO2 at high temperatures [39][40][41][42][43][44][45][46] . However, no peaks of TiO2 were found, indicating that the complete oxidation of TiC during laser ablation might take place in an environment with sufficient oxygen supply.…”

Section: Xrd Characterizationmentioning

confidence: 96%

Microstructure and wear performance of alumina/graphene coating on textured Al2O3/TiC substrate composites

Liu

Sun

Venturi

et al. 2021

Journal of the European Ceramic Society

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Section: Xrd Characterizationmentioning

confidence: 96%

Microstructure and wear performance of alumina/graphene coating on textured Al2O3/TiC substrate composites

Liu

Sun

Venturi

et al. 2021

Journal of the European Ceramic Society

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“…When performed on a micrometric scale, and beyond the advantage of being non-destructive methods, they also constitute an ideal tool for composite sintered pieces or for diffusion couples where the spatial extent of coexisting phases is limited [29]. In this work, the microprobe of the CEA/CNRS/IRAMIS/LEEL [30] The secondary electrons were collected by polarizing the sample holder (+90 V) thus limiting the uncertainty on the measured electrical charge.…”

Section: Chemical Analysis By Iga and Ibamentioning

confidence: 99%

Novel insight into the chemical analysis of light elements in oxycarbides

et al. 2018

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Pure powders of TiCxO(1-x) solid solution were synthesized through the carbothermal route. The chemical analysis of the light elements in the as-obtained TiCxO(1-x) oxycarbides powders were performed by Instrumented Gas Analysis (IGA). The cell parameters of the samples were determined with an accuracy of about 2% by means of X-ray powder diffraction and the internal standard method. As a result, a model correlating the cell parameters to the chemical composition was established. These reference TiCxO(1-x) oxycarbides powders were then sintered in order to obtain pellets of dense ceramics. After having determined that the sintering process does not change the chemical composition of the starting powder, chemical analysis of the different samples of the solid solution were successfully undertaken by Ion Beam Analysis techniques (IBA). The Nuclear Reaction Analysis (NRA) method -that was used to analyse light elements with very high sensitivity -was coupled with Rutherford Back Scattering (RBS) analysis in order to accurately determine the metallic over light elements ratio and to determine the stoichiometry of the phase on massive samples. Exhaustive simulations of the NRA spectra were performed and demonstrated that discrete compositions of the TiCxO(1-x) can be efficiently measured locally for bulk samples. Compared to IGA results, the relative amounts of carbon and oxygen of bulk materials were determined with a bias lower than 5%. This protocol being implemented for the TiCxO(1-x) system was then tested on HfCxO(1-x)with the same success.3

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“…IBA is a powerful tool to study the elemental chemical composition of surfaces, layers and interfaces [27][28][29]. Here, the composition and distribution of light elements in the layers were analysed by NRA, allowing the quantitative analysis of oxygen and nitrogen without the influence of the chemical environment and minimising the influence of roughness [12].…”

Section: Characterization Techniquesmentioning

confidence: 99%

Seeking the Oxidation Mechanism of Debris in the Fretting Wear of Titanium Functionalized by Surface Laser Treatments

et al. 2023

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Surface laser treatment (SLT) using nanosecond IR lasers has been shown to improve the tribological behaviour of titanium. Here, we studied the fretting wear of SLT-functionalized pure titanium in a mixture of reactive gases O2 (20 vol.%) + N2 (80 vol.%). The contact geometry was a ball on a plane and the ball was made of bearing steel. The very small amplitude of relative displacement between reciprocating parts in fretting wear makes the evacuation of wear particles difficult. Moreover, the oxidation mechanism of the debris depends on the accessibility of the surrounding atmosphere to the tribological contact. This work focused in the analysis of debris generation and oxidation mechanisms, and sought to differentiate the role of oxygen forming part of the ambient O2 + N2 gas mixture from oxygen present in the surface layer of the SL-treated titanium. Before the fretting test, the surface of the commercially pure titanium plates was treated with a laser under a mixture of O2 + N2 gases with oxygen enriched in the 18O isotope. Then, the fretting tests were performed in regular air containing natural oxygen. Micro-Raman spectroscopy and ion beam analysis (IBA) techniques were used to analyse the TiO2 surface layers and fretting scars. Iron oxide particles were identified by Raman spectroscopy and IBA as the third body in the tribological contact. The spatial distribution of 18O, Ti, 16O and Fe in the fretting scars was studied by IBA. The analysis showed that the areas containing high concentrations of Fe displayed also high concentrations of 16O, but smaller concentrations of 18O and Ti. Therefore, it was concluded that tribological contact allows the oxidation of iron debris by its reaction with ambient air.

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Study of the TiC1-x – TiO2 reactive interface

Cited by 14 publications

References 33 publications

Microstructure and wear performance of alumina/graphene coating on textured Al2O3/TiC substrate composites

Microstructure and wear performance of alumina/graphene coating on textured Al2O3/TiC substrate composites

Novel insight into the chemical analysis of light elements in oxycarbides

Seeking the Oxidation Mechanism of Debris in the Fretting Wear of Titanium Functionalized by Surface Laser Treatments

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