Cyclic oxidation in burner rig of TiAlN coating deposited on Ti-48Al-2Cr-2Nb by reactive HiPIMS

Badini, Claudio Francesco; Deambrosis, Silvia Maria; Ostrovskaya, Oxana; Zin, Valentina; Padovano, Elisa; Miorin, Enrico; Castellino, Micaela; Biamino, Sara

doi:10.1016/j.ceramint.2017.01.031

Cited by 27 publications

(5 citation statements)

References 40 publications

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“…Here we reported only Ti 2p signal (see Figure 3), since it is the one that gave information regarding Ti average oxidation states. The Ti 2p 3/2 XPS core line spectrum for sample T150 (Figure 3-left panel), was almost identical to that expected for a Ti(IV) chemical shift [10], with a prominent peak located at 458.8 eV. However, by comparing and overlapping T150 and T450 experimental curves, a small shoulder was detectable only on the lower binding energy (BE) side of the signal spectrum for T150 sample, at 457.3 eV, which was the position usually related to Ti(III) oxidation state [11], while this bump was not present in the T450 one.…”

Section: Resultssupporting

confidence: 67%

Li+ Insertion in Nanostructured TiO2 for Energy Storage

et al. 2019

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Nanostructured materials possess unique physical-chemical characteristics and have attracted much attention, among others, in the field of energy conversion and storage devices, for the possibility to exploit both their bulk and surface properties, enabling enhanced electron and ion transport, fast diffusion of electrolytes, and consequently high efficiency in the electrochemical processes. In particular, titanium dioxide received great attention, both in the form of amorphous or crystalline material for these applications, due to the large variety of nanostructures in which it can be obtained. In this paper, a comparison of the performance of titanium dioxide prepared through the oxidation of Ti foils in hydrogen peroxide is reported. In particular, two thermal treatments have been compared. One, at 150 °C in Ar, which serves to remove the residual hydrogen peroxide, and the second, at 450 °C in air. The material, after the treatment at 150 °C, results to be not stoichiometric and amorphous, while the treatment at 450 °C provide TiO2 in the anatase form. It turns out that not-stoichiometric TiO2 results to be a highly stable material, being a promising candidate for applications as high power Li-ion batteries, while the anatase TiO2 shows lower cyclability, but it is still promising for energy-storage devices.

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Section: Resultssupporting

confidence: 67%

Li+ Insertion in Nanostructured TiO2 for Energy Storage

et al. 2019

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“…The elastic modulus of the coating decreased with increasing numbers of duty cycles from 2.5 to 5.5%, which was accompanied by a hardness change within 27–33 GPa. In [ 23 , 24 ], a HiPIMS-deposited TiAlN coating at a 25 μs pulse time and a 500 Hz frequency possessed a high hardness of 30–35 GPa and withstood repeated heating up to 950 °C without damage or delamination. It was also shown that preliminary plasma treatment and the deposition of the intermediate metallic layer improved the heat resistance of this coating due to its high adhesion level and low defect content.…”

Section: Introductionmentioning

confidence: 99%

Properties of TiAlN Coatings Obtained by Dual-HiPIMS with Short Pulses

et al. 2023

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The paper focuses on the dual high-power impulse magnetron sputtering of TiAlN coatings using short pulses of high power delivered to the target. The surface morphology, elemental composition, phase composition, hardness, wear resistance, and adhesive strength of TiAlN coatings with different Al contents were investigated on WC–Co substrates. The heat resistance of the TiAlN coating was determined with synchrotron X-ray diffraction. The hardness of the TiAlN coating with a low Al content ranged from 17 to 30 GPa, and its wear rate varied between 1.8∙10−6 and 4.9∙10−6 mm3·N−1·m−1 depending on the substrate bias voltage. The HF1–HF2 adhesion strength of the TiAlN coatings was evaluated with the Daimler–Benz Rockwell C test. The hardness and wear rate of the Ti0.61Al0.39N coating were 26.5 GPa and 5.2∙10−6 mm3·N−1·m−1, respectively. The annealing process at 700 °C considerably worsened the mechanical properties of the Ti0.94Al0.06N coating, in contrast to the Ti0.61Al0.39N coating, which manifested a high oxidation resistance at annealing temperatures of 940–950 °C.

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“…One possibility to hinder NbN oxidation process is the addition of a third chemical element, in its matrix, such as aluminum. Al atoms have already been successfully incorporated in Ti(Al) N, Cr(Al)N, Zr(Al)N and Ta(Al)N thin films, improving the oxidation resistance besides good results in coatings mechanical properties [7][8][9][10][11] . However, as seen in the literature, adding a different element or molecule to coatings matrixes is highly prone to result in strong changes on the formed structure and properties 12 .…”

Section: Introductionmentioning

confidence: 99%

Interrelation Among Morphology, Mechanical Properties and Oxidation Behavior of NbxAlyNz Thin Films

et al. 2019

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Nb x Al y N z thin films were deposited by magnetron sputtering reactive technique with (y/x+y) ratio varying from 0 to 0.4, in order to maintain aluminum atoms inside NbN matrix in solid solution. GAXRD analyses revealed that the crystalline phase obtained for Nb x Al y N z thin films was B1-NbN with a lattice constant shrinkage as Al concentration at these coatings was increased. Due to similarity in electro negativity values between Nb and Al, XPS analyses could not verify pronounced changes among as deposited Nb x Al y N z coatings. The average hardness values evidenced that solid solution strengthening mechanism did not increase hardness significantly. The oxidation resistance increased with Al content and no oxide phases were registered by GAXRD analyses for coating with more aluminum added. However, SEM images revealed bubbles after oxidation at high temperatures for all samples.

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Cyclic oxidation in burner rig of TiAlN coating deposited on Ti-48Al-2Cr-2Nb by reactive HiPIMS

Cited by 27 publications

References 40 publications

Li+ Insertion in Nanostructured TiO2 for Energy Storage

Li+ Insertion in Nanostructured TiO2 for Energy Storage

Properties of TiAlN Coatings Obtained by Dual-HiPIMS with Short Pulses

Interrelation Among Morphology, Mechanical Properties and Oxidation Behavior of NbxAlyNz Thin Films

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