The pronounced brittleness of hard Laves phase intermetallics is detrimental to their tribological properties at room temperature. In this study, we utilized a heterogeneous structure to engineer an ultrastrong dual-phase (Laves + B2) AlCoFeNiNb high-entropy alloy that exhibits a low wear rate (3.82×10⁻⁶ mm³/(N·m)) at room temperature. This wear resistance in the ball-on-disc sliding friction test with the counterpart of Al₂O₃ balls stems from the activated deformation ability in the ultrafine Laves lamellae under heterogeneous interface constraints. Furthermore, as tribological stress intensifies, the surface deformation mechanism transitions from dislocation slip on the basal and pyramidal planes to a unique combination of local shear and grain rotation within the Laves phase. Our study illuminates fresh perspectives for mitigating the embrittling effect of Laves phase intermetallics under tribological loading and for the development of wear-resistant materials.

硬拉夫斯相金属间化合物的显着脆性不利于其在室温下的摩擦学性能。在本研究中，我们利用异质结构设计了一种超强双相 (Laves + B2) AlCoFeNiNb 高熵合金，该合金具有低磨损率 (3.82×10 ⁻⁶ mm ³ /(N·m)) 在室温下。在与 Al ₂ O ₃ 球对应的球盘滑动摩擦测试中，这种耐磨性源于异质界面约束下超细 Laves 片层的激活变形能力。此外，随着摩擦应力的加剧，表面变形机制从基面和金字塔面上的位错滑移转变为拉夫斯相内局部剪切和晶粒旋转的独特组合。我们的研究为减轻摩擦载荷下拉夫斯相金属间化合物的脆化效应和开发耐磨材料提供了新的视角。