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The effect of oxidation on the corrosion resistance and mechanical properties of a Zr-based metallic glass |
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| Authors: | X.P. Nie X.H. Yang L.Y. Chen K.B. Yeap K.Y. Zeng D. Li J.S. Pan X.D. Wang Q.P. Cao S.Q. Ding J.Z. Jiang |
| Affiliation: | aInternational Center for New-Structured Materials (ICNSM), and Laboratory of New-Structured Materials (LNSM), Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China;bJinhua College of Profession and Technology, Jinhua, Zhejiang 321007, PR China;cDepartment of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117675, Singapore;dInstitute of Materials Research and Engineering, A∗STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602, Singapore;eSchool of Materials Science and Engineering, Hefei University of Technology, Hefei 23009, PR China |
| Abstract: | The oxidation kinetics of the Zr64Cu16Ni10Al10 bulk metallic glass (BMG) roughly follows a two-stage rate law at both 433 and 593 K in air. An oxide film of 940 nm can be formed by oxidation at 593 K, which is ZrO2-enriched but Cu-depleted on the outer surface. The oxide film leads to a superior passivity in 0.5 M NaCl and great corrosion resistance improvements in other solutions. The oxidation effect on mechanical properties were characterized by nanoindentation, wedge indentation and compression tests. The Zr-based BMG still keeps the amorphous nature and its good mechanical properties are retained after oxidation. |
| Keywords: | A. Zirconium A. Alloy B. XPS C. Oxidation C. Passivity C. Pitting corrosion |
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