Influence of Ag Doping on Wide-Emperature Tribological Properties of γ-Fe2O3@SiO2 Nanocomposite Coatings on Steel-Reference-Cited by-同舟云学术

Influence of Ag Doping on Wide-Emperature Tribological Properties of γ-Fe2O3@SiO2 Nanocomposite Coatings on Steel

Published:2024-09-01 Issue:9 Volume:14 Page:996
ISSN:2075-4701
Container-title:Metals
language:en
Short-container-title:Metals

Author:

Zeng Qunfeng¹^ORCID,Sun Shichuan¹,Jia Qian²^ORCID

Affiliation:

1. Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi’an Jiaotong University, Xi’an 710049, China

2. School of Mechanical Engineering, City College, Xi’an Jiaotong University, Xi’an 710018, China

Abstract

γ-Fe2O3@SiO2-Ag nanocomposite coatings were prepared to investigate the lubrication performances of the nanocomposite coatings under a wide range of temperatures. The effect of Ag doping on the tribological properties of γ-Fe2O3@SiO2-Ag nanocomposite coatings was studied from room temperature to 600 °C, and the synergistic effect of Ag and oxides in the nanocomposite coatings was investigated. The coefficient of friction and the wear rate of γ-Fe2O3@SiO2-Ag nanocomposite coatings decrease with an increase in Ag content. The tribological properties of 24 wt.%Ag of the nanocomposite coatings are excellent. The stable coefficient of friction is 0.25 at 100 °C and the coefficient of friction is reduced to 0.05 at 500 °C. It was found that the synergistic effect of γ-Fe2O3 and Ag is helpful in improving the tribological properties of γ-Fe2O3@SiO2-Ag nanocomposite coatings over a wide temperature range. Ag plays a lubricating role at low and medium temperatures and oxides play a role in lubrication at high temperatures.

Funder

Henan Key Laboratory of High-performance Bearings

Liaoning Key Laboratory of Aero-engine Materials Tribology

National Natural Science Foundation of China

Publisher

MDPI AG

Link

https://www.mdpi.com/2075-4701/14/9/996/pdf

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