Liang Li , Liwei Zheng , Hao Lin , Kai Le , Yuzhen Liu , Hongyu Li , Zhenlin Yang , Shusheng Xu
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引用次数: 0
Abstract
To improve the wear resistance of Ni-based alloys at elevated temperatures, the CrAlN/VN multilayer coating was deposited by multi-arc ion plating. The wear tests at room temperature, 300, 500, and 700 °C were adopted to evaluate the tribology performance. The CrAlN/VN coating showed a dense cross-sectional structure, and the surface roughness of the multilayer coating was measured to be 85.3 nm, which is lower than that of the CrAlN coatings (101.7 nm). It indicates that the multilayer structure contributes to a smoother surface, which is beneficial for reducing friction and wear. The nanoindentation test showed that the hardness of the multilayer coating was 26.1 GPa, respectively, which was higher than those of the VN (18.8 GPa) and CrAlN (24.5 GPa) coatings. The CrAlN/VN multilayer coating displayed the lowest wear rate at 500 °C, which was about 3.2 × 10−6 mm3/N⋅m. The superior wear resistance of the multilayer coating was attributed to the formation of oxides at high temperatures. The wear rate of the coating will be significantly accelerated when the operating temperature exceeds the melting point of V2O5. This study provides a new strategy for the anti-wear protection of nickel-based alloys in a wide temperature range.
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.