| GE Chenyang,GUO Xiuhua,LI Shaolin,SONG Kexing,ZHOU Yanjun,LIU Haitao,ZHANG Chaomin,CAO Jun,CAO Fei,GAO Yan.Effect Mechanism of Rare Earth Y on Antioxidant Behavior of Copper Wire[J],53(10):144-155 |
| Effect Mechanism of Rare Earth Y on Antioxidant Behavior of Copper Wire |
| Received:June 05, 2023 Revised:September 12, 2023 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2024.10.011 |
| KeyWord:pure copper wire rare earth element Y rare earth oxides weight gain rate antioxidant properties |
| Author | Institution |
| GE Chenyang |
Henan Key Laboratory of Non-ferrous Materials Science and Processing Technology, Henan University of Science and Technology, Henan Luoyang , China |
| GUO Xiuhua |
Henan Key Laboratory of Non-ferrous Materials Science and Processing Technology, Henan University of Science and Technology, Henan Luoyang , China |
| LI Shaolin |
Henan Key Laboratory of Non-ferrous Materials Science and Processing Technology, Henan University of Science and Technology, Henan Luoyang , China |
| SONG Kexing |
Henan Key Laboratory of Non-ferrous Materials Science and Processing Technology, Henan University of Science and Technology, Henan Luoyang , China;Henan Academy of Sciences, Zhengzhou , China |
| ZHOU Yanjun |
Henan Key Laboratory of Non-ferrous Materials Science and Processing Technology, Henan University of Science and Technology, Henan Luoyang , China |
| LIU Haitao |
Henan Key Laboratory of Non-ferrous Materials Science and Processing Technology, Henan University of Science and Technology, Henan Luoyang , China |
| ZHANG Chaomin |
Henan Key Laboratory of Non-ferrous Materials Science and Processing Technology, Henan University of Science and Technology, Henan Luoyang , China |
| CAO Jun |
School of Mechanical and Power Engineering, Henan Polytechnic University, Henan Jiaozuo , China |
| CAO Fei |
Xi'an University of Technology, Xi'an , China |
| GAO Yan |
Henan Academy of Sciences, Zhengzhou , China;Henan Institute of Metallurgy Co., Ltd., Zhengzhou , China |
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| Abstract: |
| To address the problem of insufficient oxidation resistance of the pure copper wire, a copper wire with trace Y elements was prepared by rare-earth microalloying to study the effect of rare-earth Y content on the oxidation resistance of the copper wire. The oxidation surface morphology of the copper wire and the presence of rare-earth Y elements in the oxidation process, and the growth of oxidation films were analyzed by scanning electron microscopy (SEM), EDS energy spectrometer, and X-ray diffractometer to reveal the mechanism of adding rare-earth element Y to improve the oxidation resistance of pure copper. At different temperature (400, 500, 600 ℃), the introduction of rare earth Y element made the oxidation weight gain rate of the copper wire consistently lower than that of copper wire without the addition of rare earth element, which effectively improved the oxidation resistance of the pure copper wire, and the copper wire had good oxidation resistance when the addition of rare earth Y was 0.03wt.%. Among them, the oxidation weight gain rate of the Cu-0.03Y wire relative to the Cu wire was reduced from 0.55% to 0.2% at 600 ℃ and 10 h, with a reduction of 63%. At 500 and 600 ℃, the particle size of copper wire oxide films with different rare earth contents increased with the temperature increase, and the diameter of surface oxide particles increased, especially at 600 ℃ and 10 h. The average diameter of oxide particles of the copper wire without the addition of rare earth elements was 4.24 μm, which increased about 130% compared with that at 500 ℃. In contrast, the average diameter of oxide particles on the surface of the Cu-0.03Y copper wire was 3.52 μm, and a thick bulk oxide film was formed locally, which was beneficial to improve the oxidation resistance of the copper wire. In the oxidation process, the activation atoms on the surface of the copper substrate were easy to react with oxygen, the activation energy of Cu (100) atomic surface was more significant and easy to become activation atoms. The activation energy of Cu (111) atomic surface was lower and less easy to form activation atoms. The introduction of rare earth elements increased the proportion of Cu (111) atomic surface of the copper wire. It reduced the proportion of Cu (100) atomic surface area on the surface of the copper wire. The more significant the proportion of Cu (111), the larger the atomic surface area of Cu (111), the lower the oxidation weight gain rate of the wire; On the contrary, the more significant the proportion of the atomic surface area of Cu (100), the larger the oxidation weight gain rate of the wire. In addition, because the affinity of rare earth elements with oxygen was greater than the affinity of copper with oxygen, preferential generation of fine, rare earth oxides, rare earth oxides did not react with the substrate, rare earth elements impeded the contact reaction between copper ions and oxygen ions on the surface of the substrate, inhibiting the growth of Cu2O, thus improving the antioxidant performance of the copper wire. In summary, adding rare earth Y elements can effectively improve the oxidation resistance of pure copper wire. This work provides new ideas and methods for studying the surface oxidation resistance of pure copper wires and shows the advantages of rare earth micro alloyed wires for applications in service environments. |
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