Internal cylindrical cathode arc deposited Cr coatings on the interior of slender tube: The influence of arc currents

IF 3.8 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Benfu Wang, Xiubo Tian, Chunzhi Gong, Huiyuan Geng, Tianshi Hu
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Abstract

In this study, a novel internal cylindrical cathode arc device with electric-field assistance is proposed to address the issue of uniform coating on the interior of a slender tube. The relative average deviation of Cr coating thickness has been reduced to as low as 0.53 %, indicating high uniformity in axial thickness of the coatings. The effect of different arc currents (25–55 A) on the structure and surface properties of the coatings is investigated. The thickness, micro-structure, surface roughness, nano-hardness, friction and wear, adhesion between the coating and substrate as well as corrosion resistance of the deposited coatings are measured by a scanning electron microscopy, atom force microscopy, X-ray diffraction spectrometer, nano indenter, friction and wear instrument, scratch and indentation apparatus and electrochemical instrument, respectively. The results suggest that the proportion of macroparticles increases with arc current. Additionally, the macroparticles exhibit an atypical oblate pattern. This may lead to weaker, more fragile regions that are prone to flaking. Consequently, larger arc current gives rise to the deterioration in the tribological properties, adhesion between the coating and substrate, and electrochemical properties of the coatings. This study provides a feasible solution to obtain extremely uniform Cr coatings on the interior of slender tube by using the axially cylindrical cathode arc ion plating. At the same time, minimizing the arc current is beneficial to improve the performance of the coatings.
细长管内圆柱形阴极弧沉积Cr涂层:电弧电流的影响
本文提出了一种新型的电场辅助内圆柱形阴极电弧装置,以解决细长管内部涂膜均匀的问题。Cr涂层厚度的相对平均偏差降低到0.53%,表明涂层轴向厚度的均匀性较高。研究了不同电弧电流(25 ~ 55 A)对镀层结构和表面性能的影响。分别用扫描电镜、原子力显微镜、x射线衍射光谱仪、纳米压头、摩擦磨损仪、划痕压痕仪和电化学仪测量镀层的厚度、显微组织、表面粗糙度、纳米硬度、摩擦磨损、涂层与基体的附着力以及耐蚀性。结果表明,随着电弧电流的增大,微粒的比例增大。此外,大颗粒呈非典型扁圆形。这可能会导致更弱、更脆弱的区域容易剥落。因此,较大的电弧电流会导致涂层的摩擦学性能、涂层与基体之间的附着力和电化学性能的恶化。本研究为利用轴向圆柱形阴极电弧离子镀在细长管内部获得极均匀的Cr涂层提供了可行的解决方案。同时,减小电弧电流有利于提高涂层的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Vacuum
Vacuum 工程技术-材料科学:综合
CiteScore
6.80
自引率
17.50%
发文量
0
审稿时长
34 days
期刊介绍: Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.
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