Effects of multi-layer structure on microstructure, wear and erosion performance of the Cr/CrN films on Ti alloy substrate

Cai, Xijun; Gao, Yang; Cai, Fei; Zhang, Lin; Zhang, Shihong

doi:10.1016/j.apsusc.2019.04.008

Cited by 46 publications

(16 citation statements)

References 23 publications

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“…35 The plates of the CrN phase have an FCC structure and the Cr phase have a body-centered cubic (BCC) structure. 18 The crystallite size of the Cr/CrN nanolayered coating was estimated to be about 11 nm by using the Scherrer technique. By creating the Cr/CrN nanolayer structure and countless changing in the nucleation, the crystals were not allowed to grow more, so their crystallite size were smaller.…”

Section: Morphology and Surface Topographymentioning

confidence: 99%

“…Investigations have indicated that the presence of an intermetallic layer between nitride layers and the formation of a multilayer structure results in the stop of the nitride columnar structure and as a result the corrosion behavior is improved 13–16 . In addition, it is expected that by creating a multilayer coating, the hardness and failure toughness of the coating will improve and along with reducing the friction coefficient, the wear resistance will improve in comparison to the single‐layer coating 17,18 . It is clear that the ceramic layer has a high hardness and wear resistance, but the brittleness causes sensitivity to cracks in the coating.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of electrochemical behavior of CrN single‐layer coating and Cr/CrN nanolayered coating produced by cathodic arc evaporation physical vapor deposition

Jasempoor

Elmkhah

Imantalab

et al. 2022

Int J Applied Ceramic Tech

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The aim of the present work is to study the CrN single‐layer coating and the Cr/CrN nanolayered coating by cathodic arc evaporation physical vapor deposition (CAE‐PVD) on AISI 304 stainless steel and to assess the electrochemical behavior of the coatings. Field emission scanning electron microscopy (FE‐SEM) and X‐ray diffraction (XRD) were utilized to study the morphology and microstructure of the coatings. The mechanical behavior of the coatings was studied by the nanoindentation technique. The electrochemical behavior of the formed coatings in 3.5 wt.% NaCl solution was investigated via electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) tests. Based on the microscopic images, it was realized that both CrN and Cr/CrN coatings were formed having a dense structure on the substrate. The results of EIS measurements showed gradual changes in the polarization resistance of the Cr/CrN nanolayered coating during the immersion time. However, significant changes in the polarization resistance of the CrN single‐layer coating were seen by increasing immersion time comparing with the Cr/CrN coating. The higher polarization resistance of the Cr/CrN coating can be attributed to the effects of the interface between the layers in comparison to the CrN coating.

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Section: Morphology and Surface Topographymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of electrochemical behavior of CrN single‐layer coating and Cr/CrN nanolayered coating produced by cathodic arc evaporation physical vapor deposition

Jasempoor

Elmkhah

Imantalab

et al. 2022

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

show abstract

“…High residual stress is believed to be detrimental to the adhesion strength of films. Therefore, the enhanced L c2 values of as-deposited films mainly result from two reasons: (a) the introduction of softer Cr sublayers could relax the stress and absorb the plastic deformation in WB 2 sublayers [31]; (b) the increasing interlayers in multilayer structure could blunt the crack tips, deflect the lateral cracks, and in the end prolong the length of the path to the substrates [28,32]. However, the decreasing adhesion strength for M40 is probably attributed to the lower hardness and fracture toughness owing to the amorphous structure.…”

Section: Adhesion Strengthmentioning

confidence: 99%

Microstructure and Properties of WB2/Cr Multilayer Films with Different Bilayer Numbers Deposited by Magnetron Sputtering

Shi

Liu

et al. 2021

Acta Metall. Sin. (Engl. Lett.)

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The influence of the bilayer number on the microstructure, mechanical properties, adhesion strength and tribological behaviors of the WB 2 /Cr multilayer films was systematically investigated in the present study. Five groups of WB 2 /Cr films with the same modulation ratio were synthesized by magnetron sputtering technique. The crystalline structure of the films was determined by X-ray diffraction. The morphologies and the microstructure of the films were observed by scanning electron microscopy, atomic force microscopy and transmission electron microscopy. Furthermore, Nano indenter, scratch tester and ball-on-disc tribometer were used to evaluate the mechanical and tribological properties. As bilayer numbers varied from 5 to 40, the hardness increased first and then decreased with the maximum hardness of 33.9 GPa when the bilayer number is 30. The H/E * and H 3 /E *2 values calculated to evaluate the fracture toughness showed the similar changing trend with hardness. The adhesion strength reached the maximum of 67 N when the bilayer number is 30. The surface roughness and friction coefficient decreased with increasing bilayer number. The wear mechanism was also investigated, and the results suggested that the multilayer film with bilayer number of 30 exhibited the best wear resistance (1.78 × 10 -7 mm 3 /Nm), benefiting from the contribution of high hardness, fracture toughness and adhesion strength.

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“…Moreover, according to JCPDF 01-071-4649, the 316L base was marked as austenite (Figure 1). From the diffractograms analysis, it was established that for the HfC coatings, the width of the XRD diffraction peak narrowed with an increase in bias voltage, which indicated that the coating's crystallite size increased from about 7.5 to 14 nm as the bias voltage increased from −100 to −200 V. The growth of grain is related to the atom diffusion mechanism, in which increasing bias voltage increases the ion energies of arriving at the substrate, resulting in increasing adatom mobility, while atoms' migration to the grain boundaries results in an increase in the grain size [31]. For the HfC coatings prepared at −150 and −200 V, the most intense peaks were found in the (111) orientation, which was consistent with the XRD pole figures of the (111) crystal plane (Figure 2).…”

Section: Xrd Xps Tem and Afm Analysismentioning

confidence: 99%

The Effects of Substrate Bias on the Properties of HfC Coatings Deposited by RF Magnetron Sputtering

Wang

Ding

et al. 2021

Coatings

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In the paper, by using radio frequency (RF) magnetron sputter technology, the HfC coating grew on a 316L stainless steel substrate in an Ar atmosphere at various substrate bias voltages from 0 to −200 V. From the X-ray diffraction (XRD) and transmission electron microscopy (TEM) experiments, the HfC coatings were well crystallized and (111) preferential growth had been successfully obtained by controlling bias voltage at −200 V. Nanoindentation experimental results for the prepared HfC coatings indicated that they possessed the maximum nanohardness due to the formation of the (111) orientation. The results of electrochemical measurements displayed that 316L stainless steel (316L) coated with the HfC coatings had better corrosion resistance than bare 316L. With the bias voltage increasing to −200 V, adhesion of the 316L substrate with the HfC coating could be greatly improved, as well as corrosion resistance. The antithrombogenicity of the HfC coatings was identified by platelet adhesive and hemolytic ratio assay in vitro. It was shown that the hemocompatibility of coated 316L had been improved greatly compared with bare 316L and the HfC coatings possessed better antithrombogenicity with the bias voltage elevating above −150 V.

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Effects of multi-layer structure on microstructure, wear and erosion performance of the Cr/CrN films on Ti alloy substrate

Cited by 46 publications

References 23 publications

Comparison of electrochemical behavior of CrN single‐layer coating and Cr/CrN nanolayered coating produced by cathodic arc evaporation physical vapor deposition

Comparison of electrochemical behavior of CrN single‐layer coating and Cr/CrN nanolayered coating produced by cathodic arc evaporation physical vapor deposition

Microstructure and Properties of WB2/Cr Multilayer Films with Different Bilayer Numbers Deposited by Magnetron Sputtering

The Effects of Substrate Bias on the Properties of HfC Coatings Deposited by RF Magnetron Sputtering

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