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

被引：1
作者：
Zeng, Qunfeng [1 ]
机构：
[1] Xi An Jiao Tong Univ, Key Lab Educ Minist Modern Design & Rotor Bearing, Xian 710049, Peoples R China
来源：
LUBRICANTS | 2024年 / 12卷 / 06期
基金：
中国国家自然科学基金;
关键词：
nanocomposite coatings; doping; thermal stability; high temperature super low friction; AEROSPACE; AG; NANOPARTICLES; BEHAVIOR;
D O I：
10.3390/lubricants12060223
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The thermal stability of the gamma-Fe2O3@SiO2 nanocomposites and super low friction of the gamma-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 gamma-Fe2O3@SiO2 nanocomposite coatings, respectively. The results show that the gamma-Fe2O3@SiO2 nanocomposite with the core-shell structure has excellent thermal stability because the SiO2 shell inhibits the phase transition of the gamma-Fe2O3 phase to the alpha-Fe2O3 phase in the nanocomposites. The temperature of the phase transition in gamma-Fe2O3 can be increased from 460 to 829 degrees C. The gamma-Fe2O3@SiO2 nanocomposite coatings exhibit super low friction (0.05) at 500 degrees C. A high-temperature super low friction mechanism is attributed to gamma-Fe2O3 and the tribochemical reactions during sliding.
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页数：13
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