Chaoyue Wei, Wenqian Zhou, Xueshan Du, Kao Shi, Wenbo Cao, Jingyu Zhao, Yufu Sun
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Effect of Y₂O₃ on microstructure and properties of NbC/Ni-based coating by laser cladding
This study aims to investigate the effect of Y₂O₃ addition on the microstructure, hardness, and corrosion resistance of in-situ NbC reinforced Ni-based coatings prepared by laser cladding. The results have shown that the addition of 1.0 wt.% Y₂O₃ has refined the grains, improved phase uniformity, and increased the coating hardness to 825.12 HV₀.₂, which is 27.1% higher than the coating without Y₂O₃. Electrochemical tests revealed that the corrosion current density has decreased to 2.431 × 10−7 A cm−2 at 1.0 wt.% Y₂O₃, indicating significantly enhanced corrosion resistance. Excessive Y₂O₃ (> 1.0 wt.%) has led to particle agglomeration, grain coarsening, and a reduction in both hardness and corrosion resistance. These findings demonstrate that optimal Y₂O₃ addition can effectively enhance the performance of NbC/Ni-based composite coatings, with potential to extend the service life of components in corrosive environments.
期刊介绍：
The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.
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