Mo-Si-B coatings were prepared on molybdenum by a pack cementation process. The effects of Al₂O₃, SiO₂, and SiC fillers on the microstructural evolution and high temperature oxidation kinetic of Mo-Si-B coatings were studied. All the three Mo-Si-B coatings were composed of a MoSi₂ layer and a MoB transitional layer. The thickness of the transitional layers showed no discernable differences in different coatings, but the coating prepared with the SiC filler showed the thickest MoSi₂ outer layer owing to the additional silicon source supplied by the SiC pack agent. After oxidation at 1250 °C for 100 h, the oxidized coatings exhibited a three-layer structure consisting of an outer SiO₂ film, a middle Mo₅Si₃ layer and an inner MoSi₂ layer. The coating prepared with the SiO₂ filler showed the smallest weight gain and consumption of the MoSi₂ layer, which may be due to the residual SiO₂ pack agent favoring the rapid formation of a dense SiO₂ film.

Mo-Si-B 涂层是通过填充胶结工艺在钼上制备的。研究了Al ₂ O ₃、SiO ₂和SiC 填料对Mo-Si-B 涂层微观结构演变和高温氧化动力学的影响。所有三种 Mo-Si-B 涂层均由 MoSi ₂层和 MoB 过渡层组成。过渡层的厚度在不同涂层中没有显示出明显的差异，但由于 SiC 填充剂提供的额外硅源，用 SiC 填料制备的涂层显示出最厚的 MoSi ₂外层。在 1250 °C 氧化 100 h 后，氧化涂层表现出三层结构，由外层 SiO ₂膜，中间Mo ₅ Si ₃层和内部MoSi ₂层。用SiO ₂填料制备的涂层显示出最小的MoSi ₂层重量增加和消耗，这可能是由于残留的SiO ₂填充剂有利于快速形成致密的SiO ₂膜。