The Experts below are selected from a list of 177 Experts worldwide ranked by ideXlab platform

M M Hyland - One of the best experts on this subject based on the ideXlab platform.

  • High temperature erosion oxidation of cr3c2 nicr thermal spray coatings under simulated turbine conditions
    Corrosion Science, 2013
    Co-Authors: S Matthews, Bryony James, M M Hyland
    Abstract:

    Most erosion–oxidation research has been directed at High erodent flux, low Impact Velocity conditions typical of fluidised bed conditions. Few works have investigated erosion–oxidation under High temperature, High Impact Velocity, and low erodent flux conditions found within turbines. This work addresses the gap in knowledge of the High temperature erosion–oxidation mechanism of Cr3C2–NiCr coatings under long-term simulated turbine conditions. The same generic mechanism was observed under erosion-affected-oxidation and oxidation-affected-erosion conditions. The carbide and Cr3C2–NiCr phase interface was preferentially oxidised. An internal oxidation front progressed into the coating in advance of the slower erosive mass loss front at the surface.

S Matthews - One of the best experts on this subject based on the ideXlab platform.

  • High temperature erosion oxidation of cr3c2 nicr thermal spray coatings under simulated turbine conditions
    Corrosion Science, 2013
    Co-Authors: S Matthews, Bryony James, M M Hyland
    Abstract:

    Most erosion–oxidation research has been directed at High erodent flux, low Impact Velocity conditions typical of fluidised bed conditions. Few works have investigated erosion–oxidation under High temperature, High Impact Velocity, and low erodent flux conditions found within turbines. This work addresses the gap in knowledge of the High temperature erosion–oxidation mechanism of Cr3C2–NiCr coatings under long-term simulated turbine conditions. The same generic mechanism was observed under erosion-affected-oxidation and oxidation-affected-erosion conditions. The carbide and Cr3C2–NiCr phase interface was preferentially oxidised. An internal oxidation front progressed into the coating in advance of the slower erosive mass loss front at the surface.

  • High temperature erosion–oxidation of Cr3C2–NiCr thermal spray coatings under simulated turbine conditions
    Corrosion Science, 2013
    Co-Authors: S Matthews, Bryony James, Margaret Hyland
    Abstract:

    Most erosion–oxidation research has been directed at High erodent flux, low Impact Velocity conditions typical of fluidised bed conditions. Few works have investigated erosion–oxidation under High temperature, High Impact Velocity, and low erodent flux conditions found within turbines. This work addresses the gap in knowledge of the High temperature erosion–oxidation mechanism of Cr3C2–NiCr coatings under long-term simulated turbine conditions. The same generic mechanism was observed under erosion-affected-oxidation and oxidation-affected-erosion conditions. The carbide and Cr3C2–NiCr phase interface was preferentially oxidised. An internal oxidation front progressed into the coating in advance of the slower erosive mass loss front at the surface.

Bryony James - One of the best experts on this subject based on the ideXlab platform.

  • High temperature erosion oxidation of cr3c2 nicr thermal spray coatings under simulated turbine conditions
    Corrosion Science, 2013
    Co-Authors: S Matthews, Bryony James, M M Hyland
    Abstract:

    Most erosion–oxidation research has been directed at High erodent flux, low Impact Velocity conditions typical of fluidised bed conditions. Few works have investigated erosion–oxidation under High temperature, High Impact Velocity, and low erodent flux conditions found within turbines. This work addresses the gap in knowledge of the High temperature erosion–oxidation mechanism of Cr3C2–NiCr coatings under long-term simulated turbine conditions. The same generic mechanism was observed under erosion-affected-oxidation and oxidation-affected-erosion conditions. The carbide and Cr3C2–NiCr phase interface was preferentially oxidised. An internal oxidation front progressed into the coating in advance of the slower erosive mass loss front at the surface.

  • High temperature erosion–oxidation of Cr3C2–NiCr thermal spray coatings under simulated turbine conditions
    Corrosion Science, 2013
    Co-Authors: S Matthews, Bryony James, Margaret Hyland
    Abstract:

    Most erosion–oxidation research has been directed at High erodent flux, low Impact Velocity conditions typical of fluidised bed conditions. Few works have investigated erosion–oxidation under High temperature, High Impact Velocity, and low erodent flux conditions found within turbines. This work addresses the gap in knowledge of the High temperature erosion–oxidation mechanism of Cr3C2–NiCr coatings under long-term simulated turbine conditions. The same generic mechanism was observed under erosion-affected-oxidation and oxidation-affected-erosion conditions. The carbide and Cr3C2–NiCr phase interface was preferentially oxidised. An internal oxidation front progressed into the coating in advance of the slower erosive mass loss front at the surface.

Shuo Yin - One of the best experts on this subject based on the ideXlab platform.

  • Computational analysis of the effect of nozzle cross-section shape on gas flow and particle acceleration in cold spraying
    Surface and Coatings Technology, 2011
    Co-Authors: Shuo Yin, Xiao-fang Wang, Wen Ya Li
    Abstract:

    In cold spraying, the spraying of certain complicated surfaces may require nozzles with special cross-sections. In this study, numerical investigation is conducted to study the effect of nozzle cross-section shape on gas flow and particle acceleration in cold spraying. The comprehensive comparison between rectangular nozzles and elliptical nozzles indicates that rectangular nozzles result in slightly lower mean particle Impact Velocity than elliptical nozzles. However, for rectangular nozzles, more particles may achieve relatively High Velocity due to the larger sectional area of their potential core. Furthermore, it can also be found from the numerical results that the mean particle Impact Velocity increases gradually with the decrease in Width/Length ratio (W/L) of the cross-section because of the diminishing bow shock size. However, when reducing the W/L to 0.2, the mean particle Impact Velocity begins to decrease steeply, which may be attributed to the rather small area of the potential core for the case of W/L = 0.2. Moreover, the systematic study on the powder release position shows that releasing particles from the nozzle inlet can ensure that particles achieve a High Impact Velocity and temperature. ?? 2010 Elsevier B.V.

  • Numerical simulation of High Velocity Impact process in cold spraying based on Euler method
    Cailiao Rechuli Xuebao Transactions of Materials and Heat Treatment, 2011
    Co-Authors: Shuo Yin, Xiao-fang Wang
    Abstract:

    Numerical simulation of particle Impact behavior in cold spraying was conducted for copper by using LS-DYNA program based on Euler method. The results show that when Lagrange method is used, High Impact Velocity leads to the excessive distortion of the element, resulting in the termination of the program. The simulation results appear to a little difference from the experimental results. However, the simulation results calculated by Euler method compares fairly well with the experiment results, which means Euler method may be more suitable to simulate the Impact process in cold spraying. Moreover, the result of the multiple particles Impact process calculated by Euler method is also consistent with the experimental result.

Yongji Bao - One of the best experts on this subject based on the ideXlab platform.

  • Development of a cold spraying system for fabricating hydroxyapatite coating
    New Trends in Mechatronics and Materials Engineering, 2012
    Co-Authors: Lei Zhang, Huqiang Li, Weiqiang Geng, Wentao Zhang, Yongji Bao
    Abstract:

    A novel cold spraying system for fabricating hydroxyapatite coatings on titanium and titanium alloy substrates is introduced in this paper. A description of the system components is presented. It is expected that the system could provide an effective method to improve deposition efficiency and compactness of hydroxyapatite coating. The addition of substrate heater helps to create dense and adherent coatings. It is found that the system could make feedstock hydroxyapatite particles be accelerated to High Impact Velocity. Hydroxyapatite coatings that preserve the chemical composition and microstructure of feedstock hydroxyapatite powders are obtained.