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Structure and properties of Tb0.3Dy0.7Fe2 alloys modified by surface nitriding

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Abstract

The surface of Tb0.3Dy0.7Fe2 alloys was modified by microwave electron-cyclotron-resonance chemical vapor deposition (MW-ECR-CVD) and ion implantation technology, respectively. The microstructure and corrosion resistance of nitrided layers were investigated by means of optical microscope (OM), X-ray diffractomer (XRD), auger electron spectroscopy (AES), and electrochemical workstation. After modified by MW-ECR-CVD, the nitrogen concentration of the nitrided layers decreases gradually with the depth increasing, while the nitrogen concentration modified by ion implantation process exhibits Gaussian distribution. The self-corrosion electric potential of the sample modified by ion implantation is higher than that modified by MW-ECR-CVD, which reveals that the samples modified by ion implantation process have a better resistance to corrosion. The magnetostrictions are assessed for the samples placed in the air for one year, which further confirms that the ion implantation process is more helpful to maintain the magnetostrictions.

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Acknowledgments

This research was financially supported by the National High Technology Research and Development Program of China (No.2011AA03A404) and the National Natural Science Foundation of China (No.50801006). The authors wish to acknowledge Hai-Bo Wang for the development and fabrication of the giant magnetostrictive materials used for the experiments in this study.

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Authors and Affiliations

  1. National Engineering Research Center for Rare Earth Materials, General Research Institute for Nonferrous Metals, Beijing, 100088, China

    Hong-Chuan Yang, Shi-Rong Zhang, Dun-Bo Yu, Kuo-She Li, Yuan-Fei Yang, Quan-Xia Hu, Yang Luo & Hong-Wei Li

  2. Grirem Advanced Materials Co., Ltd., Beijing, 100088, China

    Hong-Chuan Yang, Dun-Bo Yu, Kuo-She Li, Yuan-Fei Yang, Quan-Xia Hu, Yang Luo & Hong-Wei Li

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  1. Hong-Chuan Yang
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  2. Shi-Rong Zhang
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  3. Dun-Bo Yu
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  4. Kuo-She Li
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  5. Yuan-Fei Yang
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  7. Yang Luo
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  8. Hong-Wei Li
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Correspondence to Hong-Chuan Yang.

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Yang, HC., Zhang, SR., Yu, DB. et al. Structure and properties of Tb0.3Dy0.7Fe2 alloys modified by surface nitriding. Rare Met. 40, 1198–1202 (2021). https://doi.org/10.1007/s12598-014-0357-5

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  • DOI: https://doi.org/10.1007/s12598-014-0357-5

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