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NANOMECHANICAL AND CORROSION PROPERTIES OF ZK60 MAGNESIUM ALLOY IMPROVED BY GD ION IMPLANTATION

XUE WEI TAO

School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, P. R. China

Jiangsu Key Laboratory of Advanced, Structural Meterials and Application Technology, Nanjing 211167, China

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ZHANG ZHONG WANG

School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, P. R. China

Jiangsu Key Laboratory of Advanced, Structural Meterials and Application Technology, Nanjing 211167, China

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XIAO BO ZHANG

School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, P. R. China

Jiangsu Key Laboratory of Advanced, Structural Meterials and Application Technology, Nanjing 211167, China

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ZHI XIN BA

School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, P. R. China

Jiangsu Key Laboratory of Advanced, Structural Meterials and Application Technology, Nanjing 211167, China

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, and

YA MEI WANG

School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, P. R. China

Jiangsu Key Laboratory of Advanced, Structural Meterials and Application Technology, Nanjing 211167, China

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https://doi.org/10.1142/S0218625X14500851Cited by:11 (Source: Crossref)

Abstract

Gadolinium (Gd) ion implantation with doses from 2.5 × 10¹⁶ to 1 × 10¹⁷ ions/cm² into ZK60 magnesium alloy was carried out to improve its surface properties. X-ray photoelectron spectroscopy (XPS), nanoindenter, electrochemical workstation and scanning electron microscope (SEM) were applied to analyze the chemical composition, nanomechanical properties and corrosion characteristics of the implanted layer. The results indicate that Gd ion implantation produces a hybrid-structure protective layer composed of MgO, Gd₂O₃ and metallic Gd in ZK60 magnesium alloy. The surface hardness and modulus of the Gd implanted magnesium alloy are improved by about 300% and 100%, respectively with the dose of 1 × 10¹⁷ ions/cm², while the slowest corrosion rate of the magnesium alloy in 3.5 wt.% NaCl solution is obtained with the dose of 5 × 10¹⁶ ions/cm².

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