等离子弧/高频感应重熔下等离子喷涂镍基涂层的温度曲线、微观结构演变和界面结合

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2024-10-30 DOI:10.1016/j.surfcoat.2024.131504

Hao-Nan Xuan , Nan Li , Ze-Xin Wang , Dobuvyy Oleksandr , Sheng Lu , Liang-Yu Chen

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引用次数: 0

摘要

利用等离子喷涂技术在圆柱形基底表面镀上了 800 μm 厚的 NiCrBSi 涂层，随后通过等离子弧和感应加热工艺进行重熔。这项工作研究了感应重熔过程中的温度变化和集肤效应的影响。此外，还对两步重熔后涂层的微观结构和界面结合情况进行了全面分析。结果表明，在感应重熔过程中，当涂层温度超过 900 °C 并达到峰值时，温度曲线趋于稳定。感应加热的有效深度约为 250 μm。涂层与基体之间的结合从机械结合过渡到冶金结合，在界面上形成了一个由镍和铁组成的明显扩散层。重熔效果受涂层厚度的影响。此外，通过两步重熔减少涂层界面上的气孔可提高结合强度。因此，两步重熔是改善涂层微观结构和界面结合的有效方法。

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Temperature curve, microstructure evolution, and interface bonding of plasma sprayed nickel-based coating under plasma arc/high-frequency induction remelting

An 800 μm thick NiCrBSi coating was applied to the surface of a cylindrical substrate using plasma spraying and subsequently remelted via plasma arc and induction heating processes. This work investigated the temperature variations and the influence of the skin effect during the induction remelting process. Additionally, a comprehensive analysis was conducted on the microstructure and interface bonding of the coating upon two-step remelting. Results demonstrate that during induction remelting, the temperature curve tends to stabilize when the coating temperature exceeds 900 °C and reaches its peak value. The effective depth of induction heating is approximately 250 μm. The bonding between the coating and the substrate transitions from mechanical to metallurgical bonding, forming a distinct diffusion layer comprising nickel and iron at the interface. The remelting effect is affected by the thickness of the coating. Furthermore, reducing pores at the coating interface through two-step remelting enhances the bonding strength. Consequently, two-step remelting is an effective method for improving the microstructure and interface bonding of coatings.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.