Nano mechanical and wear properties of multi-layer Ti/TiN coatings deposited on Al 7075 by high-vacuum magnetron sputtering

Ghasemi, Sajjad; Shanaghi, Ali; Chu, Paul K.

doi:10.1016/j.tsf.2017.07.049

Cited by 37 publications

(14 citation statements)

References 38 publications

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“…The structural morphology reveals smaller grains (see Figure a,b) demonstrating that a larger number of layers and interlayers reduces the pores and grains size. According to Hall–Petch, a smaller grain size and larger specific surface area lock or constrain dislocation movement and reduce the surface tension, consequently, lead to increases of hardness and improvement of corrosion resistance . On the basis of the recent results obtained by Ghasemi et al, which reported in multilayer Ti/TiN coatings deposited on Al 7075 alloy, the TiN coating has the usual columnar structure in which grain boundaries grow perpendicular to the substrate surface, similarly occurring in this study (Figure c,e).…”

Section: Resultssupporting

confidence: 84%

“…According to Hall-Petch, a smaller grain size and larger specific surface area lock or constrain dislocation movement and reduce the surface tension, consequently, lead to increases of hardness and improvement of corrosion resistance. [28,29] On the basis of the recent results obtained by Ghasemi et al, [30] which reported in multilayer Ti/TiN coatings deposited on Al 7075 alloy, the TiN coating has the usual columnar structure in which grain boundaries grow perpendicular to the substrate surface, similarly occurring in this study (Figure 3c,e). The typical microstructure is consistent with the T-area in the Trenton structural model, which is integrated with the I-area of ion bombardment.…”

Section: Resultssupporting

confidence: 84%

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Effect of Ti interlayer on corrosion behavior of nanostructured Ti/TiN multilayer coating deposited on TiAl₆V₄

Shanaghi

Ghasemi

Chu

et al. 2019

Materials & Corrosion

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To improve the corrosion properties of TiAl6V4 alloy, TiN monolayer and Ti/TiN multilayer coatings are deposited by reactive magnetron sputtering. The phase, structure, and morphology properties are investigated by grazing‐incidence X‐ray diffraction, field‐emission scanning electron microscopy, and atomic force microscopy, respectively, and the corrosion behavior is evaluated by electrochemical impedance spectroscopy and potentiodynamic polarization. The TiN monolayer and Ti/TiN multilayer with thickness of 1,350 and 1,410 nm have the (111) and (002) preferred orientation and crystallite size of 42.5 and 24.3 nm, respectively. Columnar growth in TiN is hindered by the Ti interlayers and no cracking is observed between the layers indicating strong adhesion. The nanostructured Ti/TiN coating forms stable surface titanium oxide which improves the corrosion resistance by approximately 80 and four times compared with TiAl6V4 alloy and TiN coating, respectively. Hindrance of the columnar structure in TiN by the Ti interlayer decreases the local corrosion rate and enhances the galvanic corrosion resistance by forming a layer on the β‐phase enriched with vanadium as well as a TiO2 stable layer. The nanostructured Ti/TiN coating demonstrates capacitive behavior with phase angles approximately −50° and high impedance values at low frequency to be the corrosion resistance mechanism.

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Section: Resultssupporting

confidence: 84%

Section: Resultssupporting

confidence: 84%

Effect of Ti interlayer on corrosion behavior of nanostructured Ti/TiN multilayer coating deposited on TiAl₆V₄

Shanaghi

Ghasemi

Chu

et al. 2019

Materials & Corrosion

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“…In our experimental conditions, a smaller RMS was obtained at a smaller R. Figure 3 shows the XRD spectrum of the TiN/C composite layer. Two significant diffraction peaks (111) and (200) corresponded to TiN (PDF 38-1420), whereas the weaker diffraction peak (002) corresponded to Ti (PDF 01-1197) [33,34]. This result indicated that a small R induced minimal changes in the diffraction peak of TiN (200), but R = 75% caused a significantly intensified and broadened peak.…”

Section: Test Results and Analysis Of The Sample Structuresmentioning

confidence: 91%

Effect of TiN/C Microstructure Composite Layer on the Adhesion of FDLC Film onto Silicon Substrate

Xiao

Gong

et al. 2018

Coatings

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Deposition techniques of direct current and radio-frequency magnetron sputtering were used to separately prepare TiN/C microstructural composite layer and fluorinated diamond-like carbon (FDLC) film on monocrystalline silicon. The aim was to investigate the effects of microstructural composite layers on the adhesion property of FDLC film. The results indicated that the TiN/C microstructural composite layer can distinguish from the substrate and the FDLC film. After adding the composite layers, the film-substrate binding force significantly increased. When the composite film were prepared at a partial pressure of 0.25, the binding force reached 30.5 N, which was greater than the value of 22.6 N for the sample without composite layers. TiN/C in the composite layers intensified the integration with silicon substrate because the C-C bond acted as a bridge linking the FDLC film to the silicon substrate. Furthermore, the bulges on the surface of the composite layers strengthened the physical bonding of the film with silicon substrates.

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“…In recent years, there has been an increasing interest in nanomultilayer films due to their excellent mechanical properties and tribological behavior. [ 1–6 ] Self‐lubricating multilayer coatings are typically prepared with the alternation of soft and hard layers, for example, multilayered Ti/TiN, [ 7 ] WS x /a‐C, [ 8 ] MoS 2 /a‐C, [ 9 ] WS 2 /MoS 2 , [ 10–12 ] etc. The generally accepted concepts to explain the phenomenon include modulus hardening, coordinated strain hardening, and Hall–Petch theory.…”

Section: Introductionmentioning

confidence: 99%

Effects of Mo Single‐Layer Thickness on Microstructure and Tribological Behavior of WS_x/Mo/a‐C/Mo Multilayer Films

Zheng

Wang

Wang³

et al. 2021

Adv Eng Mater

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WS2/a‐C multilayer films exhibit good friction reduction but relatively low hardness and load‐bearing capacity. To further enhance the tribological properties of WS2/a‐C films, Mo layers with different thicknesses are introduced into WSx/a‐C multilayer films to fabricate WSx/Mo/a‐C/Mo multilayer films by magnetron sputtering. The microstructure and tribological properties of the films are characterized by X‐ray diffractometry, scanning electron microscopy, nanoindentation, and ball‐on‐disk tribotesting. The results show that the WSx/Mo/a‐C/Mo multilayer films have better mechanical and tribological properties than WSx/a‐C multilayer films. With increasing Mo single‐layer thickness, the hardness of the multilayer films initially increases and then decreases slightly; moreover, an increased elastic modulus and decreased adhesion are observed. The multilayer film with an Mo single‐layer thickness of 2 nm demonstrates the optimal set of comprehensive properties (i.e., a maximum hardness (H)/elastic modulus (E) ratio of 0.0793, H3/E2 ratio of 0.0812 GPa, binding force of 30.4 N, minimum friction coefficient of 0.187, and wear rate of 1.01 × 10−14 m3 N−1 m−1).

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Nano mechanical and wear properties of multi-layer Ti/TiN coatings deposited on Al 7075 by high-vacuum magnetron sputtering

Cited by 37 publications

References 38 publications

Effect of Ti interlayer on corrosion behavior of nanostructured Ti/TiN multilayer coating deposited on TiAl₆V₄

Effect of Ti interlayer on corrosion behavior of nanostructured Ti/TiN multilayer coating deposited on TiAl₆V₄

Effect of TiN/C Microstructure Composite Layer on the Adhesion of FDLC Film onto Silicon Substrate

Effects of Mo Single‐Layer Thickness on Microstructure and Tribological Behavior of WS_x/Mo/a‐C/Mo Multilayer Films

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Nano mechanical and wear properties of multi-layer Ti/TiN coatings deposited on Al 7075 by high-vacuum magnetron sputtering

Cited by 37 publications

References 38 publications

Effect of Ti interlayer on corrosion behavior of nanostructured Ti/TiN multilayer coating deposited on TiAl6V4

Effect of Ti interlayer on corrosion behavior of nanostructured Ti/TiN multilayer coating deposited on TiAl6V4

Effect of TiN/C Microstructure Composite Layer on the Adhesion of FDLC Film onto Silicon Substrate

Effects of Mo Single‐Layer Thickness on Microstructure and Tribological Behavior of WSx/Mo/a‐C/Mo Multilayer Films

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Effect of Ti interlayer on corrosion behavior of nanostructured Ti/TiN multilayer coating deposited on TiAl₆V₄

Effect of Ti interlayer on corrosion behavior of nanostructured Ti/TiN multilayer coating deposited on TiAl₆V₄

Effects of Mo Single‐Layer Thickness on Microstructure and Tribological Behavior of WS_x/Mo/a‐C/Mo Multilayer Films