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

  • analysis of geometrical characteristics and properties of laser cladding 85 wt ti 15 wt tibcn powder on 7075 aluminum alloy substrate
    Materials, 2018
    Co-Authors: Yuxin Li, Pengfei Zhang, Zhanyong Zhao
    Abstract:

    Ti/TiBCN composite coatings were prepared on a 7075 aluminum alloy surface by laser cladding. The relation between the main processing parameters (i.e., laser power, scanning speed, and powder feeding rate) and the geometrical characteristics (i.e., height, width, penetration depth, dilution and wetting angle) of single clad tracks is studied by linear regression analysis. The microstructure, micro-hardness and electrochemical corrosion were investigated by scanning electron microscopy, a Vickers micro-hardness machine, and a standard three-Electrode Cell, respectively. The results showed that all geometrical track characteristics are observed with high values of the correlation coefficient (R > 0.95). In addition, the average hardness value (750 HV0.2) was obtained of the Ti/TiBCN composite coating, and polarization curves indicated that the composite coatings were harder to corrode than the substrate.

  • Analysis of Geometrical Characteristics and Properties of Laser Cladding 85 wt.% Ti + 15 wt.% TiBCN Powder on 7075 Aluminum Alloy Substrate
    'MDPI AG', 2018
    Co-Authors: Pengfei Zhang, Zhanyong Zhao, Pei-kang Bai, Bin Liu
    Abstract:

    Ti/TiBCN composite coatings were prepared on a 7075 aluminum alloy surface by laser cladding. The relation between the main processing parameters (i.e., laser power, scanning speed, and powder feeding rate) and the geometrical characteristics (i.e., height, width, penetration depth, dilution and wetting angle) of single clad tracks is studied by linear regression analysis. The microstructure, micro-hardness and electrochemical corrosion were investigated by scanning electron microscopy, a Vickers micro-hardness machine, and a standard three-Electrode Cell, respectively. The results showed that all geometrical track characteristics are observed with high values of the correlation coefficient (R > 0.95). In addition, the average hardness value (750 HV0.2) was obtained of the Ti/TiBCN composite coating, and polarization curves indicated that the composite coatings were harder to corrode than the substrate

Yuxin Li - One of the best experts on this subject based on the ideXlab platform.

  • analysis of geometrical characteristics and properties of laser cladding 85 wt ti 15 wt tibcn powder on 7075 aluminum alloy substrate
    Materials, 2018
    Co-Authors: Yuxin Li, Pengfei Zhang, Zhanyong Zhao
    Abstract:

    Ti/TiBCN composite coatings were prepared on a 7075 aluminum alloy surface by laser cladding. The relation between the main processing parameters (i.e., laser power, scanning speed, and powder feeding rate) and the geometrical characteristics (i.e., height, width, penetration depth, dilution and wetting angle) of single clad tracks is studied by linear regression analysis. The microstructure, micro-hardness and electrochemical corrosion were investigated by scanning electron microscopy, a Vickers micro-hardness machine, and a standard three-Electrode Cell, respectively. The results showed that all geometrical track characteristics are observed with high values of the correlation coefficient (R > 0.95). In addition, the average hardness value (750 HV0.2) was obtained of the Ti/TiBCN composite coating, and polarization curves indicated that the composite coatings were harder to corrode than the substrate.

Pengfei Zhang - One of the best experts on this subject based on the ideXlab platform.

  • analysis of geometrical characteristics and properties of laser cladding 85 wt ti 15 wt tibcn powder on 7075 aluminum alloy substrate
    Materials, 2018
    Co-Authors: Yuxin Li, Pengfei Zhang, Zhanyong Zhao
    Abstract:

    Ti/TiBCN composite coatings were prepared on a 7075 aluminum alloy surface by laser cladding. The relation between the main processing parameters (i.e., laser power, scanning speed, and powder feeding rate) and the geometrical characteristics (i.e., height, width, penetration depth, dilution and wetting angle) of single clad tracks is studied by linear regression analysis. The microstructure, micro-hardness and electrochemical corrosion were investigated by scanning electron microscopy, a Vickers micro-hardness machine, and a standard three-Electrode Cell, respectively. The results showed that all geometrical track characteristics are observed with high values of the correlation coefficient (R > 0.95). In addition, the average hardness value (750 HV0.2) was obtained of the Ti/TiBCN composite coating, and polarization curves indicated that the composite coatings were harder to corrode than the substrate.

  • Analysis of Geometrical Characteristics and Properties of Laser Cladding 85 wt.% Ti + 15 wt.% TiBCN Powder on 7075 Aluminum Alloy Substrate
    'MDPI AG', 2018
    Co-Authors: Pengfei Zhang, Zhanyong Zhao, Pei-kang Bai, Bin Liu
    Abstract:

    Ti/TiBCN composite coatings were prepared on a 7075 aluminum alloy surface by laser cladding. The relation between the main processing parameters (i.e., laser power, scanning speed, and powder feeding rate) and the geometrical characteristics (i.e., height, width, penetration depth, dilution and wetting angle) of single clad tracks is studied by linear regression analysis. The microstructure, micro-hardness and electrochemical corrosion were investigated by scanning electron microscopy, a Vickers micro-hardness machine, and a standard three-Electrode Cell, respectively. The results showed that all geometrical track characteristics are observed with high values of the correlation coefficient (R > 0.95). In addition, the average hardness value (750 HV0.2) was obtained of the Ti/TiBCN composite coating, and polarization curves indicated that the composite coatings were harder to corrode than the substrate

Jonas C Peters - One of the best experts on this subject based on the ideXlab platform.

  • gastight hydrodynamic electrochemistry design for a hermetically sealed rotating disk Electrode Cell
    Analytical Chemistry, 2017
    Co-Authors: Suho Jung, Ruud Kortleve, Rya J R Jones, Michael F Lichterma, Theodo Agapie, Charles C L Mccrory, Jonas C Peters
    Abstract:

    Rotating disk Electrodes (RDEs) are widely used in electrochemical characterization to analyze the mechanisms of various electrocatalytic reactions. RDE experiments often make use of or require collection and quantification of gaseous products. The combination of rotating parts and gaseous analytes makes the design of RDE Cells that allow for headspace analysis challenging due to gas leaks at the interface of the Cell body and the rotator. In this manuscript we describe a new, hermetically sealed electrochemical Cell that allows for Electrode rotation while simultaneously providing a gastight environment. Electrode rotation in this new Cell design is controlled by magnetically coupling the working Electrode to a rotating magnetic driver. Calibration of the RDE using a tachometer shows that the rotation speed of the Electrode is the same as that of the magnetic driver. To validate the performance of this Cell for hydrodynamic measurements, limiting currents from the reduction of a potassium ferrocyanide (K...

Masayuki Itagaki - One of the best experts on this subject based on the ideXlab platform.

  • optimization of reference Electrode position in a three Electrode Cell for impedance measurements in lithium ion rechargeable battery by finite element method
    Journal of Power Sources, 2015
    Co-Authors: Yoshinao Hoshi, Yuki Narita, Keiichiro Honda, Tomomi Ohtaki, Isao Shitanda, Masayuki Itagaki
    Abstract:

    Abstract We determine the proper placement of the reference Electrode for impedance measurements in lithium-ion rechargeable batteries with a three-Electrode Cell. Calculations of the impedance spectra of the positive and negative Electrodes and simulations of the current and potential distributions between them are performed using the finite element method. In the simulation, the positive and negative Electrodes are symmetrical face to face. Distortions of the loops and artifact inductive loops are observed in the impedance spectra of the positive and negative Electrodes when the reference Electrode is between or at the edges of the Electrodes. These distortions and the diameter of the artifact inductive loops become small when the reference Electrode is positioned outside the area between the positive and negative Electrodes. Simulations also demonstrate that current from the positive Electrode can flow to the reference Electrode and then the negative Electrode, i.e., part of the reference Electrode facing the positive Electrode becomes cathode and part of the reference Electrode facing the negative Electrode becomes anode. Therefore, the dissolution of reference Electrode occurs during impedance measurements in a three-Electrode Cell and the reference Electrode should be placed outside of the area between Electrodes, where there is no potential modulation and gradient.

  • in situ eis to determine impedance spectra of lithium ion rechargeable batteries during charge and discharge cycle
    Journal of Electroanalytical Chemistry, 2015
    Co-Authors: Masayuki Itagaki, Yoshinao Hoshi, Keiichirou Honda, Isao Shitanda
    Abstract:

    In-situ electrochemical impedance spectroscopy (in-situ EIS) was applied to the investigation of electrochemical properties of lithium-ion rechargeable batteries (LIRB). The in-situ EIS enables us the simultaneous measurements of the impedance spectra with charge/discharge curves by galvanostatic control. In the present paper, successive impedance spectra of positive and negative Electrodes were determined by using three-Electrode Cell. For example, the impedance spectra of positive Electrode during the charge and discharge allow the information regarding the deintercalation and intercalation of lithium, respectively, in LIRB. The charge transfer resistances of both positive and negative Electrodes showed the hysteresis versus the state of charge (SOC) during charge–discharge sequence. These results indicate that the charge transfer resistance for the deintercalation is larger than that for the intercalation in the cases of both positive and negative Electrodes in LIRB.