Effect of Y₂O₃ on microstructure and properties of NbC/Ni-based coating by laser cladding

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2025-09-18 DOI:10.1007/s10853-025-11540-y

Chaoyue Wei, Wenqian Zhou, Xueshan Du, Kao Shi, Wenbo Cao, Jingyu Zhao, Yufu Sun

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Abstract

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.

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Y₂O₃对激光熔覆NbC/ ni基涂层组织和性能的影响

研究了Y₂O₃的加入对激光熔覆原位NbC增强ni基涂层显微组织、硬度和耐蚀性的影响。结果表明，添加1.0 wt.%的Y₂O₃使镀层晶粒细化，相均匀性得到改善，镀层硬度提高到825.12 HV 0。2，比不使用Y₂O₃的涂层高27.1%。电化学测试表明，在1.0 wt.% Y₂O₃条件下，腐蚀电流密度下降到2.431 × 10−7 A cm−2，耐蚀性明显增强。过量的Y₂O₃（> 1.0 wt.%）导致颗粒团聚，晶粒变粗，硬度和耐腐蚀性降低。这些研究结果表明，最佳的Y₂O₃添加量可以有效提高NbC/ ni基复合涂层的性能，具有延长腐蚀环境中部件使用寿命的潜力。

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

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.