Benfu Wang, Xiubo Tian, Chunzhi Gong, Huiyuan Geng, Tianshi Hu
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引用次数: 0
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.
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.