The influence of Ag contents on the microstructure, mechanical and tribological properties of ZrN-Ag films

Ju, Hongbo; Yu, Dian; Yu, Lihua; Ding, Ning; Xu, Jie; Zhang, Xindi; Yan, Zheng; Yang, Lei; He, Xiaochen

doi:10.1016/j.vacuum.2017.10.029

Cited by 67 publications

(26 citation statements)

References 27 publications

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“…However, delamination occurred in the coatings with a high silver content (Figure 10b). The delamination behaviour of coatings doped with Ag has been reported in other investigations for high silver contents (13.1 at.%) [16,35,36].…”

Section: Resultssupporting

confidence: 70%

“…Therefore, Ag aggregates on the wear surface during the sliding process are forming an Ag layer on the counterpart, which may be responsible for the increased wear rate in relation to the reference coating. ZrN/Ag films also showed a decrease in the COF and an increase in the wear rate with a rise in the amount of Ag [28,36]. With an increase in the Ag content in the film, a large amount of the soft Ag phase in the film during the friction experiment is separated from the abrasive surface by the sliding of the friction pair and wear is formed, resulting in the film's wear rate increasing gradually with the Ag content.…”

Section: Resultsmentioning

confidence: 97%

“…A mechanism of oxidative wear can be seen for all coatings. This tribo-film is characterized by the presence of oxidized residues on the worn surface, as well as the presence of some scratches and residues of Ag, causing abrasion wear mechanisms [36]. Tribooxidation was a general phenomenon in the wear test at room temperature.…”

Section: Resultsmentioning

confidence: 99%

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A Microstructural and Wear Resistance Study of Stainless Steel-Ag Coatings Produced through Magnetron Sputtering

Recco

Olaya

2018

Coatings

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This paper presents a study of the tribological properties of stainless steel coatings with varying Ag contents, deposited via magnetron sputtering. The growth of the coatings was done in Ar and Ar + N2 atmospheres in order to change the crystalline phase in the coating. The analysis of the chemical composition was performed using energy-dispersive X-ray spectroscopy (EDS) and the structural analysis was performed via X-ray diffraction (XRD). The adhesive wear resistance and the friction coefficient were evaluated using the ball-on-disk test with a ball of alumina. The coatings’ adhesion was measured with a scratch tester and the mechanical properties were evaluated with a nanoindenter. The morphology of the films and the wear track were characterized via scanning electron microscopy (SEM). By means of XRD, phases corresponding to the body-centred cubic (BCC) structure were found for the coatings deposited in an inert atmosphere and face-centred cubic (FCC) for those deposited in a reactive atmosphere. A more compact morphology was observed in coatings with a higher silver content. The values of the hardness increased with an increase in the silver content and the presence of nitrogen in the coatings. In the wear traces, mainly mechanisms of oxidative and adhesive wear and plastic deformation were found. The coefficient of friction decreased with an increase of silver in the coatings, whereas the wear rate decreased.

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Section: Resultssupporting

confidence: 70%

Section: Resultsmentioning

confidence: 97%

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A Microstructural and Wear Resistance Study of Stainless Steel-Ag Coatings Produced through Magnetron Sputtering

Recco

Olaya

2018

Coatings

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“…A magnetron-sputtered TiAlN/VN film showed variation in the average friction coefficient in a ball-on-disc wear test against an Al 2 O 3 counterpart when the testing temperature was increased from 25 • C to 700 • C [16]. However, some transition metal nitride-based films containing copper or silver possessed tribological properties which were slightly influenced by the testing temperature, due to the self-lubricating nature of copper or silver [17][18][19]. G. Gassner et al reported [4] the self-lubrication mechanism of Mo 2 N at testing temperatures above 500 • C, while the tribological properties at <500 2 of 10 • C and the wear resistance properties of the films were barely mentioned.…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Mo2N Films at Elevated Temperature

Liu

et al. 2019

Coatings

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Mo2N films were synthesized using the reactive magnetron sputtering system in a mixture of argon and nitrogen, and the tribological properties were investigated at different testing temperatures against an Al2O3 counterpart. The relative intensity ratio (RIR) method was used to calculate the weight fraction of the tribo-film (MoO3) on the wear tracks of the films. The results showed that the average friction coefficient first increased from 0.30 at 25 °C to 0.53 at 200 °C, and then decreased to 0.29 at 550 °C, while the wear rate decreased from 2.1 × 10−6 mm3/Nmm at 25 °C to 5.3 × 10−7 mm3/Nmm at 200 °C and then increased to 3.1 × 10−5 mm3/Nmm at 550 °C. The weight fraction of tribo-film was mainly attributed to changes in the average friction coefficient and the wear rate. Besides this, the relative humidity also influenced the tribological properties at 25–200 °C.

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“…Novel as well as advanced technologies strongly require the next generation materials in the fields of tribology [15][16][17], hardness [18,19], corrosion and wear performance of the material [20], and many others [21][22][23]. The progress of material science in these fields is resulted, in large measure, from the fundamental studies by means of modern techniques, including the XPS as well [16,17,[21][22][23]. The X-ray photoelectron spectroscopy is a powerful analytical tool; however, this method is limited by the content and charge state of the atoms, while it cannot disclose the chemical behavior and structural features of the atoms in a sample, which are urgently needed in case of the multicomponent substrate.…”

Section: Introductionmentioning

confidence: 99%

Hidden Resources of Coordinated XPS and DFT Studies

Cholach¹

2018

Advanced Surface Engineering Research

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Electronic configuration of chemically bound atoms, at the surface or in the bulk of a solid, contains the traps for energy absorption provided by the valence band electron transitions; the core-level excitation of any origin is coupled with traps forming the multichannel route for energy dissipation. This chapter displays tracing over these channels by means of X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT). Conformity between energy losses in the XPS spectra and electron transitions in relevant unit cells is verified by the examples of the pristine and half fluorinated graphite C 2 F, and the Br 2-embedded C 2 F. Perfect XPS-DFT combination can be useful for material science providing exhaustive data on state and geometry of the atoms in a sample, regardless the field of its application. The valence band is insensitive to the energy source for its excitation. It makes the behavior of energy losses in XPS spectra of the atoms to be a descriptor of bonding between these atoms in multicomponent materials. Moreover, the state of any component can be tracked through change or invariability of satellites in the relevant XPS spectra, obtained in the course of the external influence, thus revealing a wear performance of the material.

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The influence of Ag contents on the microstructure, mechanical and tribological properties of ZrN-Ag films

Cited by 67 publications

References 27 publications

A Microstructural and Wear Resistance Study of Stainless Steel-Ag Coatings Produced through Magnetron Sputtering

A Microstructural and Wear Resistance Study of Stainless Steel-Ag Coatings Produced through Magnetron Sputtering

Tribological Properties of Mo2N Films at Elevated Temperature

Hidden Resources of Coordinated XPS and DFT Studies

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