Tribological Properties of AlCoCrFeNiCu High-entropy Alloy in High Concentration Hydrogen Peroxide
高浓度过氧化氢中AlCoCrFeNiCu 的摩擦学性能研究

To investigate the tribological properties of AlCoCrFeNiCu high-entropy alloy in hydrogen peroxide with strong oxidizability, a series of pin-on-disk tribo-tests were carried out using AlCoCrFeNiCu as pin and three types of engineering ceramics (ZrO2, SiC and Si3N4) as disk in a 90% hydrogen peroxide. The characterization techniques, including white light confocal microscope (CM), scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS), were employed to analyze the worn surfaces, and the wear mechanism of AlCoCrFeNiCu/ceramic tribo-pairs was discussed. The results showed that when sliding against SiC and Si3N4 ceramics, the AlCoCrFeNiCu pins had mild wear and low friction coefficient. The wear mechanism of AlCoCrFeNiCu/ZrO2 tribo-pair was a combination of adhesive wear, abrasive wear and oxidative wear. Both AlCoCrFeNiCu/SiC and AlCoCrFeNiCu/Si3N4 tribo-pair exhibited polishing oxide wear and three-body abrasive wear. The effect of boundary lubrication was found for AlCoCrFeNiCu/Si3N4 tribo-pair.