An in situ XPS study of sputter-deposited aluminium thin films on graphite

Hinnen, C.; Imbert, Daniel; Siffre, J. M.; Marcus, Philippe

doi:10.1016/0169-4332(94)90009-4

Cited by 122 publications

(72 citation statements)

References 11 publications

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“…The peak position is in between the expected O1s peak of V 2 O 5 at about 530.0 eV (Mendialdua et al, 1995;Guimond et al, 2008;Zou et al, 2009) and the reported O1s positions of Al 2 O 3 , which are typically in the range 531-533 eV (Hinnen et al, 1994;van den Brand et al, 2004;Snijders et al, 2005). For the V-Al-C-N samples discussed here, the O1s and V2p spectra are similar (see Fig.…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 49%

“…This might be due to the different amounts of the two phases, but the microstructure and Ar treatment of the sample might also play a role. For both the V-C bond (Frantz & Didziulis, 1998;Choi, 1999;Liao et al, 2005) and the Al-C bond (Hinnen et al, 1994;Jiang et al, 2002), C1s binding energies of about 282.5 eV are found in the literature. The weak peak originates from a C-C bond.…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 88%

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Composition-dependent structure of polycrystalline magnetron-sputtered V–Al–C–N hard coatings studied by XRD, XPS, XANES and EXAFS

et al. 2013

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V-Al-C-N hard coatings with high carbon content were deposited by reactive radio-frequency magnetron sputtering using an experimental combinatorial approach, deposition from a segmented sputter target. The compositiondependent coexisting phases within the coating were analysed using the complementary methods of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray absorption near-edge spectroscopy (XANES) and extended X-ray absorption fine-structure spectroscopy (EXAFS). For the analysis of the X-ray absorption near-edge spectra, a new approach for evaluation of the pre-edge peak was developed, taking into account the selfabsorption effects in thin films. Within the studied composition range, a mixed face-centred cubic (V,Al)(C,N) phase coexisting with a C-C-containing phase was observed. No indication of hexagonal (V,Al)(N,C) was found. The example of V-Al-C-N demonstrates how important a combination of complementary methods is for the detection of coexisting phases in complex multi-element coatings.

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Section: X-ray Photoelectron Spectroscopymentioning

confidence: 49%

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 88%

Composition-dependent structure of polycrystalline magnetron-sputtered V–Al–C–N hard coatings studied by XRD, XPS, XANES and EXAFS

et al. 2013

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“…It is seen in the recorded spectra that they are composed of two components. The first peak, located at 72.8 eV, is a superposition of two peaks having a spin-orbital splitting of 0.44 eV, characteristic of Al2p 3/2 and Al2p 1/2 of metallic state Al 0 [10]. The second peak at 75.2 eV is wider than the first one.…”

Section: Resultsmentioning

confidence: 89%

Influence of the surface pre-treatment of aluminum on the processes of formation of cerium oxides protective films

Andreeva

Stoyanova

Tsanev

et al. 2016

J. Phys.: Conf. Ser.

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Abstract. It is known that there is special interest in the contemporary investigations on conversion treatment of aluminum aimed at promoting its corrosion stability, which is focused on electrolytes on the basis of salts of metals belonging to the group of rare-earth elements. Their application is especially attractive, as it enables a successful substitution of the presently applied highly efficient, but at the same time toxic Cr 6+ -containing electrolytes. The present paper presents a study on the influence of the preliminary alkaline activation and acidic de-oxidation of the aluminum surface on the processes of immersion formation of protective cerium oxides films on Al 1050. The results obtained show that their deposition from simple electrolytes (containing only salts of Ce 3+ ions) on the Al surface, treated only in alkaline solution, occurs at a higher rate, which leads to preparing thicker oxide films having a better protective ability. In the cases when the formation of oxide films is realized in a complex electrolyte (containing salts of Ce 3+ and Cu 2+ ions), better results are obtained with respect to the morphology and protective action of cerium oxides film on samples that have been consecutively activated in alkaline solution and deoxidized in acidic solution.Electrochemical investigations were carried out in a model corrosion medium (0.1 M NaCl); it was shown that the cerium protective films, deposited by immersion, have a cathodic character with regard to the aluminum support and inhibit the occurrence of the depolarizing corrosion process -the reaction of oxygen reduction.

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“…The C1s-scan reveals a dominant contribution of graphite-like carbon in an aromatic environment (284.5 eV). [40][41][42][43] Further there are minor contributions to the XPS signal at binding energies of 286.0 eV and 288.8 eV, respectively. Those very broadened contributions can be assigned to sulfur-bound carbon atoms, 44,45 but oxidative contaminations cannot be excluded, either.…”

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confidence: 99%