Preparation and Tribocorrosion Performance of Different Si-Doped TiSiN-Ag Coatings on Different Substrates in Seawater

Ke Cai,Xiaolei Su,Jing Zhang,Bailing Jiang

doi:10.3390/coatings11040459

Ke Cai, Xiaolei Su + Show 2 more

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https://doi.org/10.3390/coatings11040459

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Abstract

TiSiN-Ag composite coatings with different Si doping contents were prepared by multi-arc ion plating technology on 316L, TC4, and H65 copper substrates, respectively. The microstructure of the prepared coatings was characterized by X-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy, respectively. The mechanical properties, electrochemical properties, and tribological properties were characterized by a micro-hardness tester, electrochemical workstation, scratch tester, and friction and wear tester, respectively. Results showed that the coatings with 8 wt.% Si doping content had a smaller average grain size, denser structure, excellent mechanical properties, and better anti-tribocorrosion performance than those with 5 wt.% Si doping content. The coating on the TC4 substrate with 8 wt.% Si doping content presented the best combination of properties and is a candidate for an anti-tribocorrosion material in seawater.

Highlights

Due to the strong corrosiveness, low viscosity, and poor lubricity of seawater environments and the existence of various forms of friction and wear during the operation of mechanical systems, key friction pair components in marine engineering equipment are facing more severe service conditions than those on land
TiSiN-Ag coatings formed by combining doped elements Si and Ag with hard TiN coatings can significantly improve the toughness of nanocomposite coatings and exhibit self-lubricating characteristics while maintaining their high hardness
Yirong Yao et al [20] found that a TiSiN coating had better tribological behavior than TiN in seawater and reached the best performance when Si doping content was 8 wt.%

Summary

Introduction

Due to the strong corrosiveness, low viscosity, and poor lubricity of seawater environments and the existence of various forms of friction and wear during the operation of mechanical systems, key friction pair components in marine engineering equipment are facing more severe service conditions than those on land. This restricts the service performance of marine engineering equipment [1,2,3]. The effect of Si doping content on the structure and tribocorrosion performance of TiSiN quaternary nitride coatings with a Ag phase is rarely reported

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