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Chao Sun - One of the best experts on this subject based on the ideXlab platform.

  • tialn cu nanocomposite coatings deposited by filtered cathodic Arc Ion Plating
    Journal of Materials Science & Technology, 2017
    Co-Authors: Lei Chen, Z.l. Pei, Jinquan Xiao, Jun Gong, Chao Sun
    Abstract:

    TiAlN/Cu nanocomposite coatings with Cu concentratIon of 0–1.4 at.% were deposited on the high-speed steel (HSS) substrates by filtered cathodic Arc Ion Plating technique. The chemical compositIon, microstructure, morphology, adhesIon strength, mechanical and tribological properties of the TiAlN/Cu coatings were characterized and analyzed. The results reveal that the coating structure and properties depend on not only the Cu concentratIon, but also the depositIon conditIon. The additIon of Cu significantly decreases the grain size and weakens the texture in the TiAlN/Cu coatings. With increasing the Cu concentratIon, the coating hardness decreases slightly from 30.7 GPa of the pure TiAlN coating to 28.5 GPa of the TiAlN/Cu coating with 1.4 at.% Cu. All the TiAlN/Cu coatings present sufficient adhesIon strength. In additIon, the existing state of additive Cu in the TiAlN/Cu coatings is also investigated.

  • microstructure interface and properties of multilayered crn cr2o3 coatings prepared by Arc Ion Plating
    Journal of Materials Science & Technology, 2014
    Co-Authors: Changming Shi, Jun Gong, Tiegang Wang, Zhiliang Pei, Chao Sun
    Abstract:

    There has been much interest in developing multilayered or nanolayered physical vapor depositIon (PVD) coatings identified as a group of promising protective coatings for their excellent mechanical properties and corrosIon resistance. In this study, the multilayered CrN/Cr 2 O 3 coatings with different bilayer periods ( Λ ) were synthesized on the polished high speed steel substrates from a Cr target with the alternative atmosphere of pure nitrogen and pure oxygen by Arc Ion Plating (AIP) technique. The results revealed that the microstructure, morphologies and properties of the multilayered coatings were strongly influenced by the bilayer period ( Λ ). There were two kinds of interfaces in the multilayered CrN/Cr 2 O 3 coatings: the sharp ones and the blurry ones. With reducing the value of Λ , the macro-particles densities decreased gradually, whereas the coating microhardness, adhesive strength and wear resistance first increased, and then decreased slightly or remained stable as the bilayer period Λ 2 O 3 coating with the bilayer period Λ of 590 nm possessed the best comprehensive properties, namely the highest microhardness, the strongest adhesIon, and the lowest wear rate.

  • effects of the thickness ratio of crn vs cr2o3 layer on the properties of double layered crn cr2o3 coatings deposited by Arc Ion Plating
    Journal of Materials Science & Technology, 2014
    Co-Authors: Changming Shi, Z.l. Pei, Jun Gong, Tiegang Wang, Chao Sun
    Abstract:

    In this study, CrN/Cr2O3 double-layered coatings with various thickness ratios of CrN vs Cr2O3 layer were prepared by Arc Ion Plating technology. The influences of the thickness ratio of CrN vs Cr2O3 layer on the microstructural characteristics as well as the mechanical and tribological properties of the CrN/Cr2O3 double-layered coatings were investigated. The corresponding mechanisms were also discussed. The results indicated that the insertIon of CrN layer between the Cr2O3 layer and substrate can effectively decrease the internal stress level of the coating. With increasing the thickness ratio of CrN vs Cr2O3 layer, the surface roughness of double-layered coatings decreased gradually, which had a certain influence on the frictIon coefficient. In additIon, the microhardness also declined gradually, the adhesive strength almost increased linearly, whereas the wear rate declined firstly and then increased slightly. As the thickness ratio was 2:1, the double-layered coating exhibited the best wear resistance.

  • co based amorphous nanocrystalline composite coatings deposited by Arc Ion Plating
    Journal of Materials Science & Technology, 2013
    Co-Authors: Zhengkai Chang, Jun Gong, Chao Sun
    Abstract:

    Cobalt-based amorphous/nanocrystalline composite coatings have been grown by Arc Ion Plating together with a specimen cooling system. With decreasing substrate temperature, the coatings undergo significant structure evolutIon. The degree of crystallizatIon first decreases and subsequently increases as confirmed by X-ray diffractIon. The cluster size first decreases and then remains constant as confirmed by transmissIon electron microscopy. The effect of substrate temperature on the evolutIon of the structure has been studied as a result of a competitIon between nucleatIon thermodynamics and kinetics of crystalline growth. With decreasing the substrate temperature, the microhardness and the critical load of the composite coatings firstly increased, and then remained almost constant. And the saturatIon magnetizatIon revealed the opposite trend over the same range. The essence of these phenomena was ascribed to the microstructural variatIons caused by the decrease of the substrate temperature.

  • method for Plating inner surface of long tube through Arc Ion Plating with magnetic field and electric field enhancement
    2012
    Co-Authors: Yanhui Zhao, Baohai Yu, Jinquan Xiao, Hao Du, Weigang Hua, Gong Jun, Chao Sun
    Abstract:

    The inventIon which belongs to the field of material surface modificatIon relates to a method for Plating the inner surface of a long tube through Arc Ion Plating with magnetic field and electric field enhancement. The method is characterized in that: the movement locus of a plasma beam is constrained and controlled by a magnetic field in the process of Arc Ion Plating, two sets of magnetic fieldgeneratIon apparatuses are arranged in an Arc Ion Plating depositIon apparatus, one set is arranged on a plasma transmissIon channel outside a vacuum chamber, the plasma beam is focused with the magnetic field to constrain the cross sectIon diameter and the transmissIon efficiency of the plasma beam in transmissIon, and the other set is arranged on the outer side of a tubular workpiece in the vacuum chamber to guide the plasma beam to diffuse along the axial directIon of the center of the tubular workpiece; and electric field enhancement is utilized in the Arc Ion Plating because the electricfield allows the accelerated directIonal flow of the plasma to be realized, and the electric field enhancement is realized through arranging a pulse electric field in the workpiece. By utilizing the constraint and the control of the magnetic field and the electric field to the plasma beam, a purpose that the plasma deposites the film on the inner surface of the tube is realized, so the method is suitable for Plating the inner surface of tubular workpieces which is used as a service surface.

Fuhui Wang - One of the best experts on this subject based on the ideXlab platform.

  • preparatIon and oxidatIon performance of a nicocralysihf nial composite coating deposited by Arc Ion Plating and magnetron sputtering techniques
    Journal of Materials Engineering and Performance, 2019
    Co-Authors: Hongrui Yao, Shenglong Zhu, Zebin Bao, Chengyang Jiang, Fuhui Wang
    Abstract:

    A NiCoCrAlYSiHf+NiAl composite coating was deposited onto a second-generatIon single-crystal superalloy Rene N5 by methods of Arc Ion Plating and magnetron sputtering. After vacuum annealing, the composite coating exhibited a gradient distributIon of elements, in which Al was enriched in outer layer and Cr was enriched in inner layer. Compared with conventIonal NiCoCrAlYSiHf and β-NiAl coatings, the composite coating was evaluated in isothermal and cyclic oxidatIon tests at 1100 °C in ambient air. The results showed that the oxidatIon rate of the composite coating was lower than that of NiCoCrAlYSiHf coating. Meanwhile, the extent of interdiffusIon between coating and substrate in the composite coating was slighter compared with that in the β-NiAl coating. Microstructure evolutIons of the composite coating after annealing and further oxidatIon test are investigated.

  • oxidatIon behavior of nicraly coatings prepared by Arc Ion Plating using various substrate biases effects of chemical compositIon and thickness of the coatings
    Corrosion Science, 2017
    Co-Authors: Panpan Zhao, Mingli Shen, Shenglong Zhu, Fuhui Wang
    Abstract:

    Abstract NiCrAlY coatings with various Cr and Al contents were prepared on Ni-based superalloy K438G from a single NiCrAlY target by adjusting the substrate bias during high vacuum Arc Ion Plating. The oxidatIon behavior of the coatings follows the oxide map laws proposed by Wallwork and Hed rather than the guide line based on Cr/Al = 4. As the coatings degrade due to Al depletIon, formatIon of Cr 2 O 3 scales beneath the external α-Al 2 O 3 scales was observed. The mechanism for the oxidatIon of Ni-Cr-Al alloys is discussed.

  • high vacuum Arc Ion Plating tial coatings for protecting titanium alloy against oxidatIon at medium high temperatures
    Corrosion Science, 2016
    Co-Authors: Mingli Shen, Shenglong Zhu, Mingming Zhang, Li Xin, Xueyong Ding, Fuhui Wang
    Abstract:

    Abstract High vacuum Arc Ion Plating TiAl coatings are explored for protecting titanium alloys against oxidatIon at temperatures below 700 °C. Bi-phased TiAl coatings which are composed of γ-TiAl + α 2 -Ti 3 Al were obtained under the substrate bias range of 0 V to −350 V, which formed Al 2 O 3 -rich oxide layers during oxidatIon. Higher bias induced slight decrease of Al content but dramatically densified the microstructure of the coating, resulting in improved oxidatIon resistance of the TiAl coatings. Meanwhile, no detrimental interdiffusIon phase was observed after oxidatIon for 100 h, showing good protectiveness of the TiAl coatings.

  • high vacuum Arc Ion Plating nicraly coatings bias effect and approach to preparatIon of functIonal gradient coatings
    Surface & Coatings Technology, 2015
    Co-Authors: Panpan Zhao, Mingli Shen, Shenglong Zhu, Fuhui Wang
    Abstract:

    Abstract The substrate bias effects on high vacuum Arc Ion Plating (HV-AIP) of NiCrAlY coatings on superalloy were investigated at the vacuum level of 10− 3–10− 4 Pa, which are 2–3 orders in magnitude better than that of conventIonal low vacuum Arc Ion Plating (LV-AIP). The negative bias applied to the substrate was in the range of − 50 V to − 450 V. Microstructures, depositIon rates, and chemical compositIons of the coatings are significantly influenced by the negative bias. Except for commonly observed bias induced densificatIon in microstructure and decrease in depositIon rate, strong preferential sputtering effect at high bias was observed. The sputtering yield for Cr was estimated to be ranged from ~ 0.1 to ~ 0.2 at bias from − 50 V to − 450 V, while those for Ni and Al were from ~ 0.1 to 1.5. As a result, the major phase constitutIon of the coatings changed from γ-Ni/γ′-Ni3Al phases at bias of − 50 V to α-Cr phase at bias of − 450 V. Such stronger preferential sputtering effect in HV-AIP fosters a strategy for preparing compositIonally gradient NiCrAlY coatings just by control of the substrate bias without the need of further treatments or multi-targets. Based on this concept, preparatIon of several types of gradient NiCrAlY coatings with great flexibilities by one target and one process was demonstrated.

  • high vacuum Arc Ion Plating nicraly coatings microstructure and oxidatIon behavior
    Corrosion Science, 2015
    Co-Authors: Mingli Shen, Panpan Zhao, Shenglong Zhu, Fuhui Wang
    Abstract:

    Abstract High vacuum (HV) Arc Ion Plating (AIP) was developed for depositing NiCrAlY coatings at vacuum levels of 10 −3 –10 −4  Pa, which are 2–3 orders in magnitude better than that of conventIonal low vacuum (LV) AIP. Microstructure and oxidatIon behavior of the NiCrAlY coatings prepared by HV- and LV-AIP were comparatively investigated. As compared with the LV coatings, the HV coatings showed dramatically lower porosity and better oxidatIon resistance by forming purer alumina scales during oxidatIon. The significant improvements are considered to be attributed to that HV facilitated forming denser NiCrAlY coatings and eliminating gas inclusIons in the coating.

Jianmin Chen - One of the best experts on this subject based on the ideXlab platform.

  • microstructures and properties of ticrzrval n high entropy ceramics films by multi Arc Ion Plating
    Ceramics International, 2021
    Co-Authors: Mengde Liao, Xiaohong Liu, Huidi Zhou, Jianmin Chen
    Abstract:

    Abstract High entropy ceramics (HECs) films (TiCrZrVAl)N were deposited on Inconel 718 alloys by multi-Arc Ion Plating (MAIP) equipment at different nitrogen flow ratios Rn N2/(N2+ Ar). The effects of Rn (0%, 20%, 50%, 80%, 90%) on the evolutIon of microstructure, mechanical properties, and tribological properties of films were systematically studied. The films deposited at low Rn exhibited an amorphous structure and smooth cross-sectIon, whereas the films at Rn of 50% and higher showed a face-centered-cubic (FCC) NaCl-type structure with loose columnar cross-sectIon. With the increase of Rn, the content of the N element increased, the Cr element decreased, and other elements (Ti, Zr, V, Al) nearly remained stable. The films' hardness and elastic modulus increased gradually and reached the maximum value of 31.08 ± 1.81 GPa and 387.66 ± 12.49 GPa, respectively, when Rn was 80%. The films deposited at Rn of 20% invalided easily in tribology tests, whereas the films prepared under Rn exceeded 20% presented outstanding wear resistance and obtained the minimum wear rate of 7.4×10-16 m3/(N·m) when Rn is 80%.

  • tribological properties in seawater for ti ticn coatings on ti6al4v alloy by Arc Ion Plating with different carbon contents
    Rare Metals, 2017
    Co-Authors: Gangyi Cai, Yongxin Wang, Huasheng Zhong, Jianmin Chen
    Abstract:

    TiCN coatings incorporated with Ti buffer layer were deposited on Ti6Al4V alloy by Arc Ion Plating. The carbon content in TiCN coatings was varied by controlling flow rates of C2H2 in reactive gas. The Ti/TiCN coatings have a typical structure of columnar crystal with a total thickness of about 2 µm. The elements of Ti, C and N are present as TiN and TiC in TiCN coatings. A little free carbon appears with carbon content increasing in TiCN coatings. For the TiCN coatings, the hardness, frictIon coefficient and wear rate decrease with the increase in carbon content. In seawater, both frictIon coefficient and wear rate have an obvious decrease at lower carbon content compared with those in atmosphere. However, the frictIon coefficient and wear rate only have a slight decrease, while the carbon content reaches or exceeds 10 at% in Ti/TiCN coatings.

  • structure mechanical and tribological properties of self toughening tisin ag multilayer coatings on ti6al4v prepared by Arc Ion Plating
    Applied Surface Science, 2016
    Co-Authors: Yue Wang, Chaoqun Dang, Jianmin Chen
    Abstract:

    Abstract The TiSiN/Ag multilayer coatings deposited on Ti6Al4V alloy substrate using the multi-Arc Ion Plating system. All multilayer coatings had a same total thickness of about 2.5 μm, and the TiSiN layer had a fixed thickness and the Ag layer had different thicknesses. Evidence concluded from X-ray diffractIon, scanning electron microcopies, X-ray photoelectron spectroscopy revealed that nanocrystallites and amorphous microstructure of nc-TiN and amorphous Si3N4 for individual TiSiN layers, where amorphous Si3N4 around nanocrystallites TiN boundaries, and ductile nanocrystallites silver clusters and metallic silver for individual Ag layers which can limit continuous growth of single (200) preferential orientatIon coarse columnar TiN crystal. In additIon, the TiN grain size presented a decreasing trend with the decrease of the thickness of Ag layers. The TiSiN/Ag multilayer coatings showed a significantly improved toughness compared with the TiSiN coating. The individual Ag layers of nano-multilayer coatings, not only as a self-lubricating but also as a barrier which inhibited micro cracks propagatIon, the formatIon of threading defects throughout all coatings, cause energy dissipatIon by passing through the interface zones without making the coating fail and at the same time prevented the aggressive seawater through the micro-pores. Moreover, improved toughness, excellent wear resistance together with high hardness, H/E and H3/E*2 values were found for the TiSiN/Ag multilayer coating with the individual Ag layers of 22.22 nm.

  • toughness measurement and toughening mechanisms of Arc Ion Plating cr2o3 films treated by annealing
    Ceramics International, 2015
    Co-Authors: Xiaohong Liu, Huidi Zhou, Jianmin Chen
    Abstract:

    Abstract Chromium sesquioxide (Cr2O3) films were deposited on Ni-based high-temperature alloy substrates by an Arc Ion Plating technique and then annealed at different temperatures and heating rates. The influence of annealing conditIons on the toughness of Cr2O3 films was calculated according to spherical indentatIon tests. The increase in grain size and compressive stress, variety of microstructure and surface morphology, and atom diffusIon that resulted from annealing caused toughness variatIons. The increase in grain size closed micro-cracks along the directIon of film growth. Compressive stress and a multi-crystal plane led to cracks caused by indentatIon that required more energy to break through the film. In the process of indentatIon, turning, bifurcating, and bridging of cracks on film surface was also able to dissipate energy. Atom diffusIon in the process of 1000 °C annealing also played a role in grain boundary toughening. The toughness improvement of Cr2O3 film significantly improved frictIon life.

  • structure and mechanical properties of thick r cr2n crn multilayer coating deposited by multi Arc Ion Plating
    Transactions of Nonferrous Metals Society of China, 2015
    Co-Authors: Li Jinlong, Yongxin Wang, Lei Shan, L U Xia, Jianmin Chen
    Abstract:

    Abstract A Cr/Cr2N/CrN multilayer coating with a thickness of 24.4 μm was deposited by multi-Arc Ion Plating. The coating was systematically characterized by field emissIon scanning electron microscopy (FESEM), X-ray photoelectron spectrometry (XPS), energy dispersive spectroscopy (EDS), X-ray diffractIon (XRD) and transmissIon electron microscopy (TEM). Hardness and adhesIon were tested by nanoindentatIon and scratch tester, respectively. The frictIon properties were investigated by a reciprocating UMT–3MT ball-on-disk tribometer in air and seawater. The results showed that the multilayer coating consisted of three different layers, with Cr, Cr2N and CrN phases, respectively. Compared with CrN single layer coating, the adhesIon of the multilayer coating was improved significantly, the hardness of the multilayer coating was (21±2) GPa. The corrosIon resistance of the multilayer coating was also improved in artificial seawater. The frictIon coefficient of multilayer coating was lower than that of CrN single layer coating both in air and seawater.

Jun Gong - One of the best experts on this subject based on the ideXlab platform.

  • tialn cu nanocomposite coatings deposited by filtered cathodic Arc Ion Plating
    Journal of Materials Science & Technology, 2017
    Co-Authors: Lei Chen, Z.l. Pei, Jinquan Xiao, Jun Gong, Chao Sun
    Abstract:

    TiAlN/Cu nanocomposite coatings with Cu concentratIon of 0–1.4 at.% were deposited on the high-speed steel (HSS) substrates by filtered cathodic Arc Ion Plating technique. The chemical compositIon, microstructure, morphology, adhesIon strength, mechanical and tribological properties of the TiAlN/Cu coatings were characterized and analyzed. The results reveal that the coating structure and properties depend on not only the Cu concentratIon, but also the depositIon conditIon. The additIon of Cu significantly decreases the grain size and weakens the texture in the TiAlN/Cu coatings. With increasing the Cu concentratIon, the coating hardness decreases slightly from 30.7 GPa of the pure TiAlN coating to 28.5 GPa of the TiAlN/Cu coating with 1.4 at.% Cu. All the TiAlN/Cu coatings present sufficient adhesIon strength. In additIon, the existing state of additive Cu in the TiAlN/Cu coatings is also investigated.

  • microstructure interface and properties of multilayered crn cr2o3 coatings prepared by Arc Ion Plating
    Journal of Materials Science & Technology, 2014
    Co-Authors: Changming Shi, Jun Gong, Tiegang Wang, Zhiliang Pei, Chao Sun
    Abstract:

    There has been much interest in developing multilayered or nanolayered physical vapor depositIon (PVD) coatings identified as a group of promising protective coatings for their excellent mechanical properties and corrosIon resistance. In this study, the multilayered CrN/Cr 2 O 3 coatings with different bilayer periods ( Λ ) were synthesized on the polished high speed steel substrates from a Cr target with the alternative atmosphere of pure nitrogen and pure oxygen by Arc Ion Plating (AIP) technique. The results revealed that the microstructure, morphologies and properties of the multilayered coatings were strongly influenced by the bilayer period ( Λ ). There were two kinds of interfaces in the multilayered CrN/Cr 2 O 3 coatings: the sharp ones and the blurry ones. With reducing the value of Λ , the macro-particles densities decreased gradually, whereas the coating microhardness, adhesive strength and wear resistance first increased, and then decreased slightly or remained stable as the bilayer period Λ 2 O 3 coating with the bilayer period Λ of 590 nm possessed the best comprehensive properties, namely the highest microhardness, the strongest adhesIon, and the lowest wear rate.

  • effects of the thickness ratio of crn vs cr2o3 layer on the properties of double layered crn cr2o3 coatings deposited by Arc Ion Plating
    Journal of Materials Science & Technology, 2014
    Co-Authors: Changming Shi, Z.l. Pei, Jun Gong, Tiegang Wang, Chao Sun
    Abstract:

    In this study, CrN/Cr2O3 double-layered coatings with various thickness ratios of CrN vs Cr2O3 layer were prepared by Arc Ion Plating technology. The influences of the thickness ratio of CrN vs Cr2O3 layer on the microstructural characteristics as well as the mechanical and tribological properties of the CrN/Cr2O3 double-layered coatings were investigated. The corresponding mechanisms were also discussed. The results indicated that the insertIon of CrN layer between the Cr2O3 layer and substrate can effectively decrease the internal stress level of the coating. With increasing the thickness ratio of CrN vs Cr2O3 layer, the surface roughness of double-layered coatings decreased gradually, which had a certain influence on the frictIon coefficient. In additIon, the microhardness also declined gradually, the adhesive strength almost increased linearly, whereas the wear rate declined firstly and then increased slightly. As the thickness ratio was 2:1, the double-layered coating exhibited the best wear resistance.

  • co based amorphous nanocrystalline composite coatings deposited by Arc Ion Plating
    Journal of Materials Science & Technology, 2013
    Co-Authors: Zhengkai Chang, Jun Gong, Chao Sun
    Abstract:

    Cobalt-based amorphous/nanocrystalline composite coatings have been grown by Arc Ion Plating together with a specimen cooling system. With decreasing substrate temperature, the coatings undergo significant structure evolutIon. The degree of crystallizatIon first decreases and subsequently increases as confirmed by X-ray diffractIon. The cluster size first decreases and then remains constant as confirmed by transmissIon electron microscopy. The effect of substrate temperature on the evolutIon of the structure has been studied as a result of a competitIon between nucleatIon thermodynamics and kinetics of crystalline growth. With decreasing the substrate temperature, the microhardness and the critical load of the composite coatings firstly increased, and then remained almost constant. And the saturatIon magnetizatIon revealed the opposite trend over the same range. The essence of these phenomena was ascribed to the microstructural variatIons caused by the decrease of the substrate temperature.

  • effect of cu additIon on properties of ti al si n nanocomposite films deposited by cathodic vacuum Arc Ion Plating
    Surface & Coatings Technology, 2012
    Co-Authors: Jun Gong, Xin Jiang, Zhiliang Pei, Jing Shi, Aditya Kumar, Lei Zhang, C Sun
    Abstract:

    In this paper, detailed properties of Ti-Al-Si-N nanocomposite films doped with Cu additive at various concentratIons are studied and followed with careful discussIon. Deposited on high speed steel substrates with the assistance of vacuum cathode Arc Ion Plating, the film compositIon and crystallinity can be controlled by changing the target compositIon. Then the film structure, chemical and phase compositIon, mechanical and tribological properties are characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffractIon (XRD), field emissIon scanning electron microscope (FESEM) and high resolutIon transmissIon electron microscopy (HRTEM), atomic force microscopy (AFM), nanoindentatIon and Rockwell indenter. The results indicate that with increasing copper content in the film systems, a reductIon of the grain size and a deterioratIon of the preferred orientatIon were detected by XRD and HRTEM. Furthermore the film hardness H and the elastic modulus E decrease from 35 +/- 6 to 13 +/- 1 GPa and from 286 +/- 26 to 163 +/- 13 GPa, respectively. The ratio H-3/E-2 is calculated on basis of measurements of hardness H and Young's modulus E. The adhesive strength between the film and the substrate is strongly improved, compared to others without Cu additive, as well as the tribological performance of the films. This whole study implies that these Cu-doped nanocomposite films deserve some cautiousness before its applicatIon for wear resistance. (C) 2011 Elsevier B.V. All rights reserved.

Yanhui Zhao - One of the best experts on this subject based on the ideXlab platform.

  • antibacterial ticu ticun multilayer films with good corrosIon resistance deposited by axial magnetic field enhanced Arc Ion Plating
    ACS Applied Materials & Interfaces, 2019
    Co-Authors: Jingren Wang, Sharafadeen Kunle Kolawole, Baohai Yu, Cong Peng, Yanhui Zhao, Ke Yang
    Abstract:

    In order to develop a novel kind of antibacterial Cu-containing TiN film with good corrosIon resistance, impressive mechanical properties, and low cytotoxicity, three differently designed multilayer films of TiCu/TiCuN multilayer (M1, M2, M3) were deposited on the surface of 316L stainless steel surface using the axial magnetic field-enhanced Arc Ion Plating (AMFE-ARP) method, in which the interlayer of TiCu was first introduced for Cu-containing TiN film in order to improve comprehensive properties, especially the corrosIon resistance of the film. The performance of the TiCu/TiCuN multilayer films was compared with that of the two single layers, TiN and TiCuN, which were deposited by the same method and the same total depositIon time. The results indicated that the TiCu/TiCuN multilayer film of M2 revealed the best comprehensive corrosIon resistance with low electric current values, high pitting potential, and high polarizatIon resistance due to the proper thickness of TiCu interlayers and larger number ...

  • effects of substrate pulse bias duty cycle on the microstructure and mechanical properties of ti cu n films deposited by magnetic field enhanced Arc Ion Plating
    Acta Metallurgica Sinica (english Letters), 2017
    Co-Authors: Shengsheng Zhao, Yanhui Zhao, Lvsha Cheng, V V Denisov, N N Koval, Haijuan Mei
    Abstract:

    Ti–Cu–N films were deposited on 316L stainless steel substrates by magnetic field-enhanced Arc Ion Plating. The effect of substrate pulse bias duty cycle on the chemical compositIon, microstructure, surface morphology, mechanical and tribological properties of the films was systemically investigated. The results showed that, with increasing the duty cycle, Cu content decreases from 3.3 to 0.58 at.%. XRD results showed that only TiN phase is observed for all the deposited films and the preferred orientatIon transformed from TiN(200) to TiN(111) plane with the increase in duty cycle. The surface roughness and depositIon rate showed monotonous decrease with increasing the duty cycle. The residual stress and hardness firstly increase and then decrease afterwards with the increase in duty cycle, while the variatIon of critical load shows reverse trend. Except for the film with duty cycle of 10%, others perform the better wear resistance.

  • tin films depositIon inside stainless steel tubes using magnetic field enhanced Arc Ion Plating
    Vacuum, 2015
    Co-Authors: Yanhui Zhao, Chaoqian Guo, Wenjin Yang, Yuqiu Chen
    Abstract:

    Abstract A magnetic field-enhanced Arc Ion Plating (MFE-AIP) is utilized to deposit TiN films on the inner wall of a stainless-steel tube with inner diameter 36 mm and length from 108 to 288 mm. Three groups of magnetic field coils are designed and located at different positIons, to produce axial magnetic field to focus and to guide the Arc plasma beam to spread along the center axial directIon of the tubular workpiece. Samples of AISI 304 stainless steel are horizontally placed inside the tube to investigate the structure and performance of the films. A pulse bias is applied to the substrate to accelerate the plasma. The structure, surface morphology, cross-sectIonal image, hardness and wear-resistant properties as a functIon of the positIon inside the tubes are investigated by X-ray diffractIon (XRD), scanning electron microscope (SEM), nanoindenter, frictIon-tester, respectively. The results show that the film structures change from a single TiN phase into mixed phases of TiN and Ti 2 N with the increase in the distance to the tube entrance. The thickness, hardness and sliding frictIon coefficient of the films decrease with the increase in the distance to the tube entrance. The magnetic field-enhanced Arc Ion Plating is shown to be an effective tool to treat the inner surface of stainless-steel tubes.

  • method for Plating inner surface of long tube through Arc Ion Plating with magnetic field and electric field enhancement
    2012
    Co-Authors: Yanhui Zhao, Baohai Yu, Jinquan Xiao, Hao Du, Weigang Hua, Gong Jun, Chao Sun
    Abstract:

    The inventIon which belongs to the field of material surface modificatIon relates to a method for Plating the inner surface of a long tube through Arc Ion Plating with magnetic field and electric field enhancement. The method is characterized in that: the movement locus of a plasma beam is constrained and controlled by a magnetic field in the process of Arc Ion Plating, two sets of magnetic fieldgeneratIon apparatuses are arranged in an Arc Ion Plating depositIon apparatus, one set is arranged on a plasma transmissIon channel outside a vacuum chamber, the plasma beam is focused with the magnetic field to constrain the cross sectIon diameter and the transmissIon efficiency of the plasma beam in transmissIon, and the other set is arranged on the outer side of a tubular workpiece in the vacuum chamber to guide the plasma beam to diffuse along the axial directIon of the center of the tubular workpiece; and electric field enhancement is utilized in the Arc Ion Plating because the electricfield allows the accelerated directIonal flow of the plasma to be realized, and the electric field enhancement is realized through arranging a pulse electric field in the workpiece. By utilizing the constraint and the control of the magnetic field and the electric field to the plasma beam, a purpose that the plasma deposites the film on the inner surface of the tube is realized, so the method is suitable for Plating the inner surface of tubular workpieces which is used as a service surface.

  • ti cu n hard nanocomposite films prepared by pulse biased Arc Ion Plating
    Applied Surface Science, 2011
    Co-Authors: Yanhui Zhao, Xueqi Wang, Jinquan Xiao
    Abstract:

    In this work, Ti-Cu-N hard nanocomposite films were deposited on high-speed-steel (HSS) substrates using a TiCu (88: 12 at.%) single multi-component target by pulse biased Arc Ion Plating. The influence of pulse bias voltages was examined with regard to elemental compositIon, structure, morphology and mechanical properties of the films. The Cu atomic content of Ti-Cu-N films was determined by Electron Probe Micro-Analyzer (EPMA). The structure and morphology were examined by X-ray diffractIon (XRD) and scanning electron microscopy (SEM). Hardness and film/substrate adhesIon were determined by nanoindenter and scratch test, respectively. The results showed that the content of Cu appeared to be in the range of 1.75-4.5 at.%, depending on pulse bias voltages. The films exhibit a preferred orientatIon TiN (1 1 1) texture when the substrate bias voltages were -100 V and -300 V, while the preferred orientatIon change to be a preferred orientatIon TiN (2 2 0) one when the substrate bias voltages increase to -600 V and -900 V. And no obvious sign of metal copper phase was observed. The SEM morphologies showed some macroparticles (MPs) on the surface of the films and the relative content of the MPs decreased significantly when the substrate bias voltages increased from -100 to -900 V. The maximum value (74 N) of the film/substrate adhesIon of the films was obtained when the substrate bias voltage was -600 V with Cu content of 1.75 at.%. Hardness enhancement was observed, the value of the hardness increased firstly and reached a maximum value of 31.5 GPa, corresponding to Cu content of 1.75 at.%, and then it decreased when the substrate bias voltage changed from -100 to -900 V. The hardness enhancement was discussed related to the concept for the design of hard materials. Crown Copyright (C) 2011 Published by Elsevier B. V. All rights reserved.