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Mechanical and corrosion properties of Al/Ti film on magnesium alloy AZ31B

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Abstract

Preparation of titanium film on magnesium substrate faces a challenge due to non-Fickian inter-diffusion between titanium and magnesium. Aluminum can build a bridge between titanium and magnesium. Al/Ti duplex coatings were deposited on magnesium alloy AZ31B using magnetron sputtering (MS). The low temperature diffusion bonding behavior of the Mg/Al/Ti coating was investigated through SEM and its affiliated EDS. The phase structure and critical load of the coatings were examined by means of XRD and scratch tests, respectively. The results demonstrated that the bonding strength was significantly improved after a post heat treatment (HT) at a temperature of 210°C. The diffusion mechanism of the interfaces of Mg/Al and Al/Ti in the coating was discussed based on the analysis of formation energy of vacancies and diffusion rates. The Al/Ti dual layer enhanced the corrosion resistance of the alloy. And the HT process further increased the corrosion resistance of the coated alloy. This result implies that a post HTat a lower temperature after MS is an effective approach to enhance the bonding strength and corrosion resistance of the Al/Ti film on Mg alloys.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China

    Rong-Chang Zeng, Ke Jiang, Shuo-Qi Li, Fen Zhang & Hong-Zhi Cui

  2. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China

    Rong-Chang Zeng, Ke Jiang, Shuo-Qi Li, Fen Zhang & Hong-Zhi Cui

  3. Institute of Metals Research, Chinese Academy of Sciences, Shenyang, 110016, China

    En-Hou Han

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  1. Rong-Chang Zeng
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  2. Ke Jiang
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Correspondence to Rong-Chang Zeng.

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Zeng, RC., Jiang, K., Li, SQ. et al. Mechanical and corrosion properties of Al/Ti film on magnesium alloy AZ31B. Front. Mater. Sci. 9, 66–76 (2015). https://doi.org/10.1007/s11706-015-0272-1

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  • DOI: https://doi.org/10.1007/s11706-015-0272-1

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