Cyclic oxidation behavior of NiCrAlYSi + NiAl/cBN abrasive coating at 900 °C and the mechanical properties of the coating-substrate system were investigated. Results indicated that elemental interdiffusion occurred between the coating and substrate, which caused the formation of interdiffusion zone (IDZ) and secondary reaction zone (SRZ) during aluminization, while their compositions and structures changed with oxidation. AlN interfacial layer formed at cBN/metallic matrix interface during aluminization, while it transformed into multilayer oxides during oxidation. Due to the microstructural evolution of these interfaces, the fracture behavior and bending toughness of the system changed greatly during three-point bending tests. Besides, the damage mechanisms were discussed.

研究了NiCrAlYSi + NiAl / cBN磨料涂层在900°C时的循环氧化行为以及涂层-基底体系的机械性能。结果表明，在镀层和基体之间发生元素互扩散，导致铝化过程中形成互扩散区（IDZ）和次级反应区（SRZ），而其组成和结构随氧化而改变。在渗铝过程中，在cBN /金属基体界面处形成的AlN界面层，在氧化过程中转变为多层氧化物。由于这些界面的微观结构演变，在三点弯曲测试期间，系统的断裂行为和弯曲韧性发生了很大变化。此外，还讨论了损伤机理。