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Behavior of NiCrAlY coating on the TC6 titanium alloy 被引量:1

Behavior of NiCrAlY coating on the TC6 titanium alloy
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摘要 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. 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.
出处 《Journal of University of Science and Technology Beijing》 CSCD 2008年第2期167-172,共6页 北京科技大学学报(英文版)
基金 This study was supported by the National Key Program of the Tenth Five-Year Plan of China (05-MKP-089).
关键词 NiCrAlY coating TC6 titanium alloy vacuum heat treatment MICROSTRUCTURE INTERDIFFUSION NiCrAlY coating TC6 titanium alloy vacuum heat treatment microstructure interdiffusion
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