Tailoring the surface chemical bond states of the NbN films by doping Ag: Achieving hard hydrophobic surface

Ren, Ping; Zhang, Kan; Du, Suxuan; Meng, Qingnan; He, Xin; Wang, Shuo; Wen, Mao; Zheng, Weitao

doi:10.1016/j.apsusc.2017.02.199

Cited by 27 publications

(5 citation statements)

References 42 publications

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“…Nanocrystalline materials attract broad attention because of their enhanced mechanical, soft magnetic, optical, and electronic properties compared to coarse-grained materials depending on the size effect. − Here, superior mechanical properties, such as improved hardness and toughness, can be obtained due to the small grain size coupled with abundant grain boundaries . To obtain stronger strengthening effect, a straightforward way is grain refinement, as described by the Hall–Petch relation. , On the basis of this factor, continuous efforts have been made to develop either metal-based − or ceramic-based materials. − However, a practical critical size invalidating this relationship does exist in both metals and ceramics. , In addition, it is always the case that a high elasticity modulus occurs in such nanocrystalline materials.…”

Section: Introductionmentioning

confidence: 99%

Ultrafine Ceramic Grains Embedded in Metallic Glass Matrix: Achieving Superior Wear Resistance via Increase in Both Hardness and Toughness

Yang

Wen

Xuan

et al. 2018

ACS Appl. Mater. Interfaces

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As structural materials, crystalline or metallic glass materials have attracted scientific and practical interests. However, some mechanisms involving critical size and shear bands have adverse effects on their mechanical properties. Here, we counter these two effects by introducing a special structure with ultrafine ceramic grains (with a diameter of ∼2.0 nm) embedded into a metallic glass matrix, wherein the grains are mainly composed of a Ta-W-N solid solution structure in nature, surrounded by a W-based amorphous matrix that contains Ta and N atoms. Such a structure is in situ formed during preparation, which combines the merits of both phases to achieve simultaneous increase in hardness and toughness relative to references (pure TaN and W) and thus superior wear resistance. Even more remarkable, a favorable variation of increased hardness but reduced elasticity modulus can be induced by this structure. Intrinsically, ultrafine ceramic grains (free of dislocations), embedded in the metallic glass matrix, could prevent shear band propagation within the glass matrix and further improve the hardness of the matrix material. In return, such glass matrix allows for stiffness neutralization and structural relaxation to reduce the elasticity modulus of ceramic grains. This study will offer a new guidance to fabricate ultrahigh-performance metal-based composites.

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Section: Introductionmentioning

confidence: 99%

Ultrafine Ceramic Grains Embedded in Metallic Glass Matrix: Achieving Superior Wear Resistance via Increase in Both Hardness and Toughness

Yang

Wen

Xuan

et al. 2018

ACS Appl. Mater. Interfaces

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“…One of the methods for improving the durability and lifetime of these materials is to deposit ceramic coatings on their surfaces [5,6]. Among the large family of ceramic coatings, there are transition metal nitrides, such as titanium nitride (TiN), chromium nitride (CrN), niobium nitride (NbN), and zirconium nitride (ZrN), which have been studied extensively for different applications due to their hardness, wear resistance, corrosion resistance, and attractive colors [7][8][9][10]. For instance, the ZrN coatings have been shown to improve the surface properties of stainless steel, such as corrosion and wear resistance [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and Optical Behavior of ZrN-Ag Coatings Deposited by Means of DC Reactive Magnetron Sputtering Technique

2022

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The formation of nanostructured transition metal nitride coatings by introducing a small amount of silver (Ag) content has been proven to be a good strategy for enhancing the physical properties of these materials. In this investigation, ZrN coatings with different Ag contents were deposited on an AISI 316L substrate using the DC reactive magnetron sputtering technique. The influence of the silver on the chemical composition, morphology, and microstructure was investigated using energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The functional properties, specifically the corrosion resistance and the optical reflectance of the deposited coatings, were investigated using electrochemical impedance spectroscopy (EIS) and UV-Visible-NIR, respectively. The results showed the formation of two nanocrystalline phases, fcc-ZrN and metallic fcc-Ag. On the surface of the deposited coatings, homogeneously distributed silver nanoparticles were observed, and they increased with the Ag atomic content. The chemical composition on the surface showed evidence of the formation of oxides, such as Zr-O and Zr-O-N, before and after the corrosion tests. The corrosion resistance of the AISI 316L substrate and the coatings was improved with the incorporation of Ag, and the optical reflectance increased with increasing the Ag content. Finally, this work investigated the effect of the incorporation of silver into a ZrN matrix for potential use as optical protective coatings.

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“…These agents can react with the surface to form a chemical bond, which can alter the surface properties of the material. For example, the application of a hydrophobic chemical agent to a surface can make the surface more resistant to water, while the application of a hydrophilic agent can make the surface more receptive to water [15]. This type of surface modification technique has a wide range of applications, including improving the performance of catalysts and sensors, increasing the wear resistance of machine parts, and enhancing the performance of solar cells and other electronic devices.…”

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confidence: 99%

Recent Advances in Surface Functionalisation

Salguero

Batista

et al. 2023

Coatings

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Tailoring the surface chemical bond states of the NbN films by doping Ag: Achieving hard hydrophobic surface

Cited by 27 publications

References 42 publications

Ultrafine Ceramic Grains Embedded in Metallic Glass Matrix: Achieving Superior Wear Resistance via Increase in Both Hardness and Toughness

Ultrafine Ceramic Grains Embedded in Metallic Glass Matrix: Achieving Superior Wear Resistance via Increase in Both Hardness and Toughness

Electrochemical and Optical Behavior of ZrN-Ag Coatings Deposited by Means of DC Reactive Magnetron Sputtering Technique

Recent Advances in Surface Functionalisation

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