Isothermal oxidation kinetic behavior of coating at 1100°C were investigated for the 3 ∼ 6 components multi-principal element alloy coatings of the 10 groups were prepared by laser cladding. The results indicate that adding an appropriate amount of Al and Si content is beneficial in the alloy coating to preferentially form a Al₂O₃ and Cr₂O₃ protective scale. As the lattice distortion magnitude of alloy system is rising, the oxidation kinetics constant K_p value of the alloy coating is decreased, it is related to the atomic jump path in lattice matrix. Overall, the hopping path of the atom in the fcc lattice matrix is longer than the bcc. In addition, regarding the Weibull modulus of the hardness statistical value after coating oxidation, indicating that the fcc-alloy is durable at high temperatures than bcc-alloy. This study provides potential contributions to the application of high temperature thermal protection for multi- principal element alloy coatings.

采用激光熔覆法制备了10组3~6组份多主元素合金涂层，研究了涂层在1100℃下的等温氧化动力学行为。结果表明，添加适量的Al和Si含量有利于合金镀层优先形成Al ₂ O ₃和Cr ₂ O ₃保护膜。随着合金体系晶格畸变幅度的增大，氧化动力学常数K _p合金镀层值降低，与晶格基体中原子跳跃路径有关。总体而言，fcc 晶格矩阵中原子的跳跃路径比 bcc 长。此外，关于涂层氧化后硬度统计值的威布尔模量，表明fcc-合金在高温下比bcc-合金更耐用。该研究为多主元素合金涂层的高温热保护应用提供了潜在的贡献。