Tribological characterization of TiO 2 /Au decorative thin films obtained by PVD magnetron sputtering technology

Abreu, C.S.; Matos, Joana; Cavaleiro, A.; Alves, E.; Barradas, N.P.; Vaz, F.; Torrell, Marc; Gomes, J.R.

doi:10.1016/j.wear.2015.01.069

Cited by 15 publications

(7 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The gold pre-deposited CP-Ti samples all had lower and more stable friction although they increased with the testing time. It was reported that gold in sputtering-produced TiO 2 layer reduced the CoF to 0.16-0.23 against bearing steel in a reciprocating tribotest [30]. Gold particles could self-restore under the applied load because of their low shear strength even if a local failure occurred in the TiO 2 layer, therefore reducing the friction and increasing the wear resistance in a sliding test [31].…”

Section: Discussionmentioning

confidence: 99%

Impact of the Amount of the Gold Layer on the Tribological Performance of the Ceramic Conversion Treated CP-Titanium

Zhang

et al. 2023

Tribol Lett

View full text Add to dashboard Cite

Titanium alloys are characterised by poor tribological properties, and a ceramic TiO2 layer formed on the surface can greatly improve its performance. By pre-depositing a gold layer on the titanium surface, the gold particles promoted the outward diffusion of titanium in the ceramic conversion treatment to react with the inward-coming oxygen to form a compact titanium dioxide layer. The surface morphology, microstructure, and phase constituents were characterised by SEM/EDX and XRD. The adhesion of the oxide layers was assessed by a scratch test. The distribution of gold particles in the oxide layer enhanced the surface hardness and reduced the friction and wear against a WC (tungsten carbide) ball in the reciprocal tribological test. The ceramic conversion process was accelerated efficiently at 620–660 °C, and the more gold pre-deposited, the thicker the oxide layer. Graphical Abstract

show abstract

Section: Discussionmentioning

confidence: 99%

Impact of the Amount of the Gold Layer on the Tribological Performance of the Ceramic Conversion Treated CP-Titanium

Zhang

et al. 2023

Tribol Lett

View full text Add to dashboard Cite

show abstract

“…Owing to the synergetic effect of more than one NP type, composites usually exhibit superior performance compared to individual NPs [136][137][138]. Thus, Cu/CeO 2 , Al 2 O 3 /SiO 2 , ZrO 2 /SiO 2 , and (Zn-Ni)/nano Al 2 O 3 composite NPs were used as energy-efficient lubricant additives [139].…”

Section: Nanocompositesmentioning

confidence: 99%

“…In Ref. [138], the tribological behavior of decorative thin-film nanocomposities consisting of gold NPs dispersed in the TiO 2 dielectric matrix was studied, and it was demonstrated that the clustering of gold, the increase in grain size, and the crystallization of the TiO 2 dielectric matrix correlated with changes in tribological parameters.…”

Section: Nanocompositesmentioning

confidence: 99%

Metal-containing nanomaterials as lubricant additives: State-of-the-art and future development

2019

View full text Add to dashboard Cite

This review focuses on the effect of metal-containing nanomaterials on tribological performance in oil lubrication. The basic data on nanolubricants based on nanoparticles of metals, metal oxides, metal sulfides, nanocomposities, and rare-earth compounds are generalized. The influence of nanoparticle size, morphology, surface functionalization, and concentration on friction and wear is analyzed. The lubrication mechanisms of nanolubricants are discussed. The problems and prospects for the development of metal-containing nanomaterials as lubricant additives are considered. The bibliography includes articles published during the last five years. Friction 7(2): 93-116 (2019) | https://mc03.manuscriptcentral.com/friction Friction 7(2): 93-116 (2019) 97 |www.Springer.com/journal/40544 | Friction http://friction.tsinghuajournals.comFriction 7(2): 93-116 (2019)

show abstract

“…Using a planar magnetron, thin films of metals or dielectrics can be reliably prepared over large areas [12]. This deposition system is used to deposit, e.g., tribological, catalytic, optical, or decorative coatings [13][14][15]. An alternative deposition method based on sputtering the use of a metal nozzle with a flowing gas has attracted attention in the past.…”

Section: Introductionmentioning

confidence: 99%

Plasma Jet Sputtering as an Efficient Method for the Deposition of Nickel and Cobalt Mixed Oxides on Stainless-Steel Meshes: Application to VOC Oxidation

et al. 2022

View full text Add to dashboard Cite

Hollow cathode plasma sputtering is an advantageous method of preparing catalysts in the form of thin oxide films on supports. Such catalysts are particularly suitable for processes such as catalytic total oxidation of volatile organic compounds (VOCs), representing an economically feasible and environmentally friendly method of VOC abatement. Catalysts with Ni:Co molar ratios of 1:4, 1:1, and 4:1 were prepared on stainless-steel meshes and compared with single-component Ni and Co oxide catalysts. The properties of the catalysts were characterized by EDX, SEM, powder XRD, temperature-programmed reduction (H2-TPR), Raman spectroscopy, and XPS. Powder XRD revealed the formation of various crystalline phases that were dependent on molar the Ni:Co ratio. NiO and Co3O4 were identified in the single-component Ni and Co oxide catalysts, whereas Ni-Co mixed oxides with a spinel structure, together with NiO, were found in the catalysts containing both Ni and Co. Raman spectra of the catalysts prepared at high working pressures showed a slightly lower intensity of bands, indicating the presence of smaller oxide particles. The TPR profiles confirmed the improved reducibility of the Ni-Co oxide catalysts compared to the single-component Ni and Co catalysts. Catalytic activity was investigated in the deep oxidation of ethanol and toluene, which were used as model volatile organic compounds. In ethanol oxidation, the activity of sputtered catalysts was up to 16 times higher than that of the commercial Cu-Mn oxide catalyst EnviCat® VOC-1544. The main benefits of the sputtered catalysts are the much lower content of Ni and Co oxides and a negligible effect of internal diffusion. Moreover, the process of plasma jet sputtering can be easily implemented on a large scale.

show abstract

Tribological characterization of TiO 2 /Au decorative thin films obtained by PVD magnetron sputtering technology

Cited by 15 publications

References 32 publications

Impact of the Amount of the Gold Layer on the Tribological Performance of the Ceramic Conversion Treated CP-Titanium

Impact of the Amount of the Gold Layer on the Tribological Performance of the Ceramic Conversion Treated CP-Titanium

Metal-containing nanomaterials as lubricant additives: State-of-the-art and future development

Plasma Jet Sputtering as an Efficient Method for the Deposition of Nickel and Cobalt Mixed Oxides on Stainless-Steel Meshes: Application to VOC Oxidation

Contact Info

Product

Resources

About