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Physical and Mechanical Characterization of HVOF-Deposited NiCrBSi Composite Coating
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Physical and Mechanical Characterization of HVOF-Deposited NiCrBSi Composite Coating

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Abstract:

Nickel-based coatings are a vital technology in industrial applications, offering protection to metallic objects against high temperatures, wear, corrosion, and erosion. The current research work examines the deposition of NiCrBSi powder in Stainless steel (AISI SS 304) using the high-velocity oxy-fuel (HVOF) thermal spray coating technique. The effects of HVOF-deposited NiCrBSi coatings on the microstructure, morphology, and mechanical and physical properties of the coated stainless steel. Microstructural and morphological analyses were performed using scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM), and X-ray diffraction (XRD) to characterize the coating. The coatings were systematically assessed for surface roughness, deposition efficiency, coating thickness, and porosity. Adhesion strength was measured using a pull-off adhesion tester to ensure robust bonding. The results demonstrate that HVOF-sprayed NiCrBSi coatings possess low porosity (2-3%), strong adhesion (45–55 MPa), and increased hardness, making them highly suitable for high-temperature, anti-wear applications, with improved durability and performance under harsh operating conditions.

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Periodical:

Key Engineering Materials (Volume 1036)

Pages:

11-26

DOI:

https://doi.org/10.4028/p-J5NkCD

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Online since:

December 2025

Authors:

Sujata Sahoo, Pragyan Senapati*, Sisir Mantry, Harekrushna Sutar

Keywords:

Adhesion Strength, HVOF, Microstructure, Nickel-Based Coating, NiCrBSi Coating

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© 2025 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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