Two medium-entropy alloy coatings (MEACs), CoCrNiTi and CrFeNiTi, were successfully prepared on pure Ti sheet by utilizing pulsed laser cladding. Microstructural characterization reveals that both the MEACs are mainly comprised of BCC solid-solution phase along with interdendritic Cr₂Ti Laves phase (C14 type) due to element segregation. Hardness and wear tests show that the CoCrNiTi MEAC has a hardness of 762 ± 32 HV and a specific wear rate of 1.7 × 10⁻⁵ mm³·N⁻¹·m⁻¹, and those of the CrFeNiTi MEAC are 820 ± 34 HV and 2.8 × 10⁻⁵ mm³·N⁻¹·m⁻¹, respectively, both of which are markedly superior to the pure Ti substrate (114 ± 5 HV and 5.4 × 10⁻⁴ mm³·N⁻¹·m⁻¹). Comprehensive analyses suggest that the excellent properties of the MEACs can be attributed to combined strengthening effects of solid-solution, short-range order, grain refinement and the Cr₂Ti Laves phase.

利用脉冲激光熔覆在纯钛板上成功制备了两种中熵合金涂层（MEACs）CoCrNiTi和CrFeNiTi。微观结构表征表明，由于元素偏析，两种 MEAC 主要由 BCC 固溶相和枝晶间 Cr ₂ Ti Laves 相（C14 型）组成。硬度和磨损试验表明，CoCrNiTi MEAC的硬度为762 ± 32 HV，比磨损率为1.7 × 10 ^-5  mm ³ ·N ^-1 ·m ^-1，CrFeNiTi MEAC的硬度为820 ± 34 HV和 2.8 × 10 ^-5  mm ³ ·N ^-1 ·m ^-1分别显着优于纯钛衬底（114 ± 5 HV 和 5.4 × 10 ^-4  mm ³ ·N ^-1 ·m ^-1）。综合分析表明，MEACs 的优异性能可归因于固溶、短程有序、晶粒细化和 Cr ₂ Ti Laves 相的综合强化作用。