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High-temperature tribological performance of Ni-based coating on 316L stainless steel

Date

2022 - 2024

    Led a comprehensive research study comparing the wear resistance and tribological properties of Ni-based coatings (NiCrBSiFeC) applied through two different thermal spraying techniques: Atmospheric Plasma Spray (APS) and High-Velocity Oxy-Fuel (HVOF). The study focused on high-temperature applications at 500°C, which is critical for components in power generation, nuclear power plants, turbines, and aerospace industries.

    Key Achievements:
    Successfully demonstrated a 40% improvement in wear resistance using HVOF-coated specimens compared to APS coating
    Conducted detailed analysis of wear mechanisms using scanning electron microscopy (SEM)
    Performed systematic testing using a pin-on-disc tribometer with a heating chamber according to ASTM G99 standards
    Analyzed coefficient of friction and sliding wear rates under specified operating conditions
    Characterized coating properties including hardness, porosity, and thickness for both APS and HVOF techniques

    Technical Aspects:
    Utilized high-hardness Silicon-Nitride (Si3N4) ball as counter-material
    Implemented precise coating thickness measurements (285±35 μm for APS and 254±40 μm for HVOF)
    Evaluated sliding wear performance at 1 m/s velocity under 20N normal load
    Conducted comprehensive microstructural analysis of wear tracks
    Documented detailed wear mechanisms including abrasion, adhesion, and delamination

    Impact:
    The research provides valuable insights for industrial applications requiring high-temperature wear resistance, particularly in critical sectors like nuclear power generation and aerospace. The findings contribute to better material selection and coating process optimization for components operating in extreme conditions.

    Publications:
    Research published in "Results in Surfaces and Interfaces" (2025), demonstrating significant contributions to the field of surface engineering and tribology.

    This project showcases expertise in:
    Advanced materials characterization
    Thermal spray coating techniques
    High-temperature tribological testing
    Surface engineering
    Wear mechanism analysis
    Industrial applications of protective coatings
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