采用电磁悬浮熔炼+直接铸造的方法制备了千克级的AlCr_1.3TiNi₂共晶高熵合金，借助TEM、APT等表征手段分析了该合金的微观组织与成分分布，使用HT-1000摩擦试验机对比研究了该合金与GH4169镍基高温合金的高温摩擦学性能。结果表明：该共晶高熵合金具有超细的层片状共晶组织(层片间距约350 nm)，其共晶两相为晶格错配度只有约2%的bcc相与L2₁相，L2₁相中还存在大量的纳米析出相；≤ 600℃时，共晶高熵合金的磨损机理以磨粒磨损为主，其磨损率均低于GH4169合金；800℃时，共晶高熵合金的磨痕表面塑性变形加剧，其摩擦系数明显高于GH4169合金，但2者的磨损率相差不大。GH4169合金高温耐磨性的提高得益于其磨损表面氧化物膜的形成，而共晶高熵合金出色的耐磨性主要与其良好的高温组织稳定性及力学性能有关。

Eutectic high-entropy alloys (EHEAs) have been explored as possible options for high-temperature applications due to their controlled microstructure and excellent mechanical properties. In particular, EHEAs possess good liquidity and castability, allowing their possibility for real-size industrial manufacturing. However, despite their importance as a structural material index, the tribological properties were rarely investigated in the EHEAs field. In this study, a kilogram-scale AlCr_1.3TiNi₂ EHEA was produced using electromagnetic levitation melting and direct casting approach. The EHEA's microstructure and chemical composition were investigated using a TEM and APT techniques. The AlCr_1.3TiNi₂ EHEA's tribological properties were examined from room temperature to 800^oC using a rotational ball-on-disk tribometer (HT-1000). Meanwhile, for comparison, a GH4169 nickel-base superalloy was chosen. The corresponding wear mechanisms were also thoroughly discussed. The findings exhibit that the as-cast AlCr_1.3TiNi₂ EHEA, which had an ultrafine lamellar structure, consisted of a disordered bcc phase and an ordered L2₁ phase with lattice misfit of approximately 2%. The average interlamellar spacing was about 350 nm. Additionally, a large number of nanoprecipitates contains in the L2₁ lamellae central region. Below 600^oC, the AlCr_1.3TiNi₂ EHEA's primary wear mechanism was abrasive wear, and its wear rate was lower than that of the GH4169 alloy. At 800^oC, distinct plastic deformation features were observed on the worn surface of EHEA. The EHEA exhibited a much higher friction coefficient than that of the GH4169 alloy at 800^oC, but their wear rates were similar. The wear resistance improvement of GH4169 alloy at high temperature was ascribed to the formation of oxide film on its worn surface, and the AlCr_1.3TiNi₂ EHEA's excellent wear resistance mainly resulted from good structure stability and high hot hardness. Current findings offer new insights into the industrial application of EHEA in high-temperature fields.