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Effect of temperature on the interface structure and corrosion ofCu/Ni coating on TC4 alloy
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School of materials science and engineering,Chang’an University

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The Key Program of the Chinese Academy of Sciences

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    Abstract:

    In this paper, the diffusion behavior of Cu/Ni/Ti atoms at different temperatures was studied by means of diffusion heat treatment. The influence of diffusion process on the structure and corrosion of the coating was also discussed. The results show that the corrosion resistance of the coating surface can be effectively improved with the stable diffusion layer formed by the mutual diffusion of Cu/Ni/Ti atoms. As the thermal diffusion temperature up to 700 ℃, the compact structure of membrane layer, the NixTiy intermetallic compounds and a small amount of CuxTiy intermetallic compounds formed in the diffusion layer, the corrosion resistance of coating on the surface of the best. Temperature to 800 ℃, Kirkendall space grew up together each other, which is formed by the formation of cracks or holes and make coating porous, so as to lower the corrosion resistance, due to Kirkendall effect is triggered by atoms at the interface between Cu/Ni/Ti structure.

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[Zhu Lixia, Luo Jinheng, Wu Gang, Li Lifeng, Zhang Shuxin, Liu Shuangshuang, Chen Yongnan. Effect of temperature on the interface structure and corrosion ofCu/Ni coating on TC4 alloy[J]. Rare Metal Materials and Engineering,2019,48(6):1897~1903.]
DOI:10.12442/j. issn.1002-185X.20181211

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History
  • Received:December 03,2018
  • Revised:February 01,2019
  • Adopted:February 21,2019
  • Online: July 30,2019
  • Published: