Temperature-adaptive lubrication of Ag doped Cr2AlC nanocomposite coatings

Dong, Yufeng; Wang, Zhenyu; Yuan, Jianghuai; Wang, Zhendong; Zhang, Yupeng; Ma, Guanshui; Wang, Aiying

doi:10.1016/j.wear.2023.205221

Cited by 4 publications

(1 citation statement)

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“…The nanocomposite coatings exhibit a low coefficient of friction (CoF) [35,36]. The research shows that the Ag element in the coatings is helpful to reduce the CoF of the Ag-Cr 2 AlC coatings from 25 to 700 • C [37]. However, the mechanical properties of the coatings are relatively low due to the soft metal Ag.…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability and High-Temperature Super Low Friction of γ-Fe2O3@SiO2 Nanocomposite Coatings on Steel

Zeng

2024

Lubricants

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The thermal stability of the γ-Fe2O3@SiO2 nanocomposites and super low friction of the γ-Fe2O3@SiO2 nanocomposite coatings in ambient air at high temperature are investigated in this paper. X-ray diffraction, scanning electron microcopy, transmission scanning electron microcopy, high-temperature tribometer, thermogravimetric analysis and differential scanning calorimetry were used to investigate the microstructure, surface morphology and high-temperature tribological properties of the γ-Fe2O3@SiO2 nanocomposite coatings, respectively. The results show that the γ-Fe2O3@SiO2 nanocomposite with the core–shell structure has excellent thermal stability because the SiO2 shell inhibits the phase transition of the γ-Fe2O3 phase to the α-Fe2O3 phase in the nanocomposites. The temperature of the phase transition in γ-Fe2O3 can be increased from 460 to 829 °C. The γ-Fe2O3@SiO2 nanocomposite coatings exhibit super low friction (0.05) at 500 °C. A high-temperature super low friction mechanism is attributed to γ-Fe2O3 and the tribochemical reactions during sliding.

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Section: Introductionmentioning

confidence: 99%