19Fe20-xCo20-xNi41Mo2x（x=0，1，2，3，4，5）共晶高熵合金（EHEAs）的摩擦學(xué)性能。結(jié)果表明，添加微量Mo的EHEA可形成面心立方（fcc）+B2共晶組織，而添加相對較高含量Mo的EHEAs可形成fcc+B2+μ樹枝狀組織。Mo元素有利于提高L12相的強(qiáng)度和B2相的延性。然而，隨著Mo含量的增加，生成的富Mo μ相降低了EHEAs的強(qiáng)度和塑性。Al19Fe18Co18Ni41Mo4 EHEA具有高強(qiáng)度和高延展性的最佳組合。增加Mo含量可以提高EHEAs的抗氧化性。隨著Mo含量的增加，EHEA在滑動過程中形成了抗氧化性增強(qiáng)的摩擦氧化物層，摩擦系數(shù)單調(diào)下降。本研究為Al19Fe20-xCo20-xNi41Mo2x EHEAs的摩擦學(xué)性能研究提供了指導(dǎo)。;Tribological properties of Al19Fe20-xCo20-xNi41Mo2x (x=0, 1, 2, 3, 4, 5) eutectic high-entropy alloys (EHEAs) were investigated in this research. Results show that EHEAs with trace Mo addition can form the face-centered cubic (fcc)+B2 eutectic microstructure, whereas EHEAs with relatively higher Mo content can form fcc+B2+μ dendritic microstructure. Mo element is beneficial to the strength enhancement of L12 phase and the ductility improvement of B2 phase. However, with increasing the Mo content to x>2, the resultant Mo-rich μ phase degrades the strength and plasticity of EHEAs. Al19Fe18Co18Ni41Mo4 EHEA has the optimal combination of high strength and high ductility. Increasing Mo content can improve the oxidation resistance of EHEAs. With increasing the Mo content, EHEA forms a tribo-oxide layer with improved oxidation resistance during sliding process, and the friction coefficient is monotonically decreased. This research provides guidance for the investigation of tribological properties of Al19Fe20-xCo20-xNi41Mo2x EHEAs."/>