A NiCrAlY coating was deposited on the TC6 titanium substrate by arc ion plating (ALP). The structure and morphologies of the NiCrAlY coating were characterized by X-ray diffraction (XRD) and scanning electron mic...A NiCrAlY coating was deposited on the TC6 titanium substrate by arc ion plating (ALP). The structure and morphologies of the NiCrAlY coating were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and the influence of vacuum heat treatment on the element diffusion behavior was studied. The results showed that the y'-Ni3Al phase was precipitated on the NiCrAlY coating after heat treatment. The Ni3(AI,Ti), TiNi, and Ti2Ni intermetallic layers appeared at the interface from the outside to the inside at 700℃, and the thickness of the intermetallic layers increased with the increase in temperature. At 700℃ Ti and Ni were the major diffusion elements, and the diffusion of Cr was observed when the heat treatment temperature increased up to 870℃. The violent inward diffusion of Ni at 950℃ resulted in the degradation of the NiCrAlY coating.展开更多
基金This study was supported by the National Key Program of the Tenth Five-Year Plan of China (05-MKP-089).
文摘A NiCrAlY coating was deposited on the TC6 titanium substrate by arc ion plating (ALP). The structure and morphologies of the NiCrAlY coating were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and the influence of vacuum heat treatment on the element diffusion behavior was studied. The results showed that the y'-Ni3Al phase was precipitated on the NiCrAlY coating after heat treatment. The Ni3(AI,Ti), TiNi, and Ti2Ni intermetallic layers appeared at the interface from the outside to the inside at 700℃, and the thickness of the intermetallic layers increased with the increase in temperature. At 700℃ Ti and Ni were the major diffusion elements, and the diffusion of Cr was observed when the heat treatment temperature increased up to 870℃. The violent inward diffusion of Ni at 950℃ resulted in the degradation of the NiCrAlY coating.
基金This work was supported by the natural science foundation of Hebei Province, China (E2014203135) and Independent research project of YanShan University Young teachers, China (14LGA015).