Tribocorrosion and tribological behavior of Ti-DLC coatings deposited by filtered cathodic vacuum arc

Shen, Yongqing; Liao, Bin; Zhang, Xu; Zhao, Yuanyuan; Zeng, Xin; Chen, Lin; Pang, Pan; Bao, Fang Jun

doi:10.1016/j.diamond.2022.108985

Cited by 23 publications

(12 citation statements)

References 41 publications

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“…Element doping and transition layer structures are developed to improve the performance of DLC coatings. It is found that Ti [13], Cr [14], W [15] and Si [16,17] are carbide-forming elements that could form nano-carbide embedded in the DLC coatings to release the initial stress and improve the bonding strength. For example, Ti content of the Ti-DLC coatings was prepared to determine the microstructural characteristics, and it was found that at low Ti content (<2.8 at.…”

Section: Introductionmentioning

confidence: 99%

“…%) some amorphous titanium carbide phase would form, and with the increase in Ti content, TiC nano-crystallite may form [18]. Shen [13] et al have deposited Ti-doping DLC coatings onto 304L stainless steel and found that the doped Ti elements can relax the structure as pivot sites and decrease the residual stress. Y. Uzun [19] has deposited Ti-DLC coatings onto 316L stainless steel and found that the incorporation of Ti elements significantly enhances the bonding strength between the coating and the substrate.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Bias Voltages on the Tribological Behaviors of DLC Coatings

Zhang,

Huang,

Sun

et al. 2024

Coatings

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Ti/TiN/(Ti,N)-DLC/Ti-DLC/DLC coatings were deposited on 431 stainless steel using direct current magnetron sputtering technology under different bias voltages(0 V, −100 V, −200 V and −300 V). The microstructure and tribocorrosion performance of these DLC coatings in seawater was investigated. The results indicated that under the bias voltages, a denser and smoother surface of DLC coatings with a higher bonding strength between coatings and substrates was observed related to the increased incident kinetic energy of deposited ionized atoms. When the bias voltage was −200 V, the surface roughness reduced from 9.81 nm to 7.03 nm, and the bonding strength enhanced from 8.23 N to 8.86 N. What is more, the sp3 bond proportion and the disorder degree in DLC coatings both increased, which resulted in improved hardness and deformation resistance. However, when the bias voltage was −300 V, the increase of the amorphization was associated with a simultaneous rise in internal stress, which reduced the hardness and bond strength a little (8.72 N). DLC coatings can effectively improve the tribocorrosion properties of 431 stainless steel in seawater. When the voltage was −200 V, the average friction coefficient decreased from 0.35 to 0.07, with shallower wear traces and the wear loss of the DLC coating also being the smallest. The abrasive wear caused by metal oxides falling off the grinding ball, and the plastic deformation of the DLC coatings are the main wear forms. The high-density structure of DLC coatings under bias voltages can not only prevent the rapid expansion of cracks during deformation, but also provides a physical barrier to the erosion, which improves the corrosion and friction resistance in seawater. The optimization of bias voltage can improve the tribological performance of DLC coatings by regulating the carbon chain bond and microstructure. These results provide reference for DLC preparation and their potential engineering applications in stainless steel.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Bias Voltages on the Tribological Behaviors of DLC Coatings

Zhang,

Huang,

Sun

et al. 2024

Coatings

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“…In addition, Ti doping in DLC coating could lead to the formation of nanocomposite structure, where TiC nanoclusters are embedded in an amorphous carbon matrix. It was found that the unique structure of nanocomposite coatings could provide a large number of interfaces and small grain size, which prevent the initiation and propagation of cracks [14,15]. Therefore, Ti doping in DLC coating is expected to further enhance comprehensive performance.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, Ti doping in DLC coating is expected to further enhance comprehensive performance. Many studies [13][14][15] have reported the effect of Ti content on the microstructure, mechanical, and tribological properties of Ti-DLC coatings. It is well known that ion energy has huge influence on the growth of coatings, which leads to the different structure and properties of the coatings [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Anti-Tribocorrosion Performance of Ti-DLC Coatings Deposited by Filtered Cathodic Vacuum Arc with the Optimization of Bias Voltage

et al. 2022

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To improve the anti-tribocorrosion property, and decrease the metal dissolution and wear of stainless-steel components caused by the synergistic action of corrosion and friction in marine environments, Ti-DLC coatings were obtained on steel substrate using a filtered cathodic vacuum arc (FCVA) system by adjusting bias voltage. The structure, mechanical properties, corrosion, and tribocorrosion behavior were investigated. Increasing the bias voltage from −50 V to −300 V, Ti content decreased from 23.9 to 22.5 at.%, and grain size decreased first, and then increased. Obvious TiC grains embedded in the amorphous carbon matrix were observed in the coating from the TEM result. Hardness increased from 30.23 GPa to 34.24 GPa with an increase in bias voltage from −50 to −200 V. The results of tribocorrosion testing showed that the Ti-DLC coatings at −200 V presented the best anti-tribocorrosion performance with the smallest friction coefficient of 0.052, wear rate of 2.48 × 10−7 mm3/N∙m, and high open-circuit potential, which is mainly due to the dense structure, high value of H/E* and H3/E*2, and great corrosion resistance. Obtained results suggest that the Ti-DLC coating with nanocomposite structure is a potential protective material for marine equipment.

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