Effect of laser ablation over cavitation, slurry erosion, and surface properties of 86WC-10Co-4Cr based ceramic coating developed using HP-HVOLF

The manuscript presents a detailed study on WC-10Co-4Cr powder coatings applied via HP-HVOLF and subjected to laser ablation. FESEM analysis showed strong metallurgical bonding between the coating and SS410 substrate (≈75 MPa), crucial for durability. Despite the presence of cavities and pits, the c...

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Bibliographic Details
Published in:Surface & coatings technology 2024-09, Vol.492, p.131230, Article 131230
Main Authors: Vishnoi, Mohit, Singh, Vikrant, Bansal, Anuj, Murtaza, Qasim, Kumar, Paras
Format: Article
Language:English
Subjects:
HP-HVOLF
Laser ablation
SS410
WC-10Co-4Cr
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Summary:The manuscript presents a detailed study on WC-10Co-4Cr powder coatings applied via HP-HVOLF and subjected to laser ablation. FESEM analysis showed strong metallurgical bonding between the coating and SS410 substrate (≈75 MPa), crucial for durability. Despite the presence of cavities and pits, the coating's overall thickness remains consistent post-ablation, affirming stability. EDS mapping confirmed uniform elemental distribution, with well-bonded transition zones. Vickers hardness increased in laser-ablated samples (HV0.3 ≈ 1523) compared to unablated samples (HV0.3 ≈ 1344). Slurry and cavitation erosion analyses demonstrated superior resistance in laser-ablated samples due to higher microhardness and elevated static contact angles. Contact angle measurements indicated hydrophobicity in both un-textured and textured samples, with textured surfaces showing increased hydrophobicity. •Strong metallurgical bonding (≈75 MPa) between coating and SS410 substrate ensures durability.•Coating's thickness remains consistent post-laser ablation, indicating stability despite cavities and pits.•Vickers hardness significantly increases in laser-ablated samples (HV0.3 ≈ 1523).•Laser-ablated samples show superior erosion resistance due to higher microhardness and hydrophobicity.
ISSN:0257-8972
DOI:10.1016/j.surfcoat.2024.131230