Behavior of NiCrAlY coating on the TC6 titanium alloy

Changqing Xia; Xiaomin Peng; Jia Li

doi:10.1016/S1005-8850(08)60032-8

Volume 15 Issue 2

Apr. 2008

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Abstract

International Journal of Minerals, Metallurgy and Materials > 2008 > 15(2): 167-172. > DOI: 10.1016/S1005-8850(08)60032-8

Changqing Xia, Xiaomin Peng, and Jia Li, Behavior of NiCrAlY coating on the TC6 titanium alloy, J. Univ. Sci. Technol. Beijing , 15(2008), No. 2, pp.167-172. https://dx.doi.org/10.1016/S1005-8850(08)60032-8

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Materials

Behavior of NiCrAlY coating on the TC6 titanium alloy

Author Affilications

School of Materials Science and Engineering, Central South University, Changsha 410083, China

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This study was supported by the National Key Program of the Tenth Five-Year Plan of China (05-MKP-089).

Received: 26 April 2007; Available Online: 13 June 2021

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Abstract

Abstract

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 γ'-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.
- NiCrAlY coating,
- TC6 titanium alloy,
- vacuum heat treatment,
- microstructure,
- interdiffusion

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