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Effect of a carbon additive on the TbCu7-type melt-spun Sm(Co, M)7 (M=Ti, Zr, Hf, V and Ge) ribbons

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Abstract

The effect of a carbon additive on the microstructure and the magnetic properties of melt-spun SmCo7−x M x C y (M=Ti, Zr, Hf, V and Ge; x = 0–0.3 and y = 0–0.1) ribbons was studied. Based on the XRD and the TEM analyses, a pure 1:7 phase could be formed for the C-containing ribbons with M= Ti and Ge. However, carbide phases, i.e., Sm2C3 for M=Zr and Hf, and SmCoC2 for M=V, respectively, were found. Nevertheless, a slight C addition may effectively refine the microstructure and improve both the intrinsic coercvity and the magnetic energy product in all the studied ribbons. Among them, the SmCo6.9V0.1C0.1 ribbons with σ r = 58.7 emu/g, i H c = 13.5 kOe and (BH) max = 9.3 MGOe, and the SmCo6.9Hf0.1C0.1 ribbons with σ r = 61.6 emu/g, i H c = 11.8 kOe and (BH) max = 10.3 MGOe are most suitable for the bonded magnet applications.

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Authors and Affiliations

  1. Department of Physics, National Chung Cheng University, Chia-yi, 62102, Taiwan, R.O.C.

    Chih-Chieh Hsieh, Shih-Teng Huang, Jin-Sheng Guo, Chih-Wei Shih & Wen-Cheng Chang

  2. Department of Chemistry, Tunghai University, Taichung, 40704, Taiwan, R.O.C.

    Huang-Wei Chang

  3. Super Electronics Co. Ltd, Taipei, 11141, Taiwan, R.O.C.

    Chun-Chung Shaw

Authors
  1. Chih-Chieh Hsieh
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  2. Shih-Teng Huang
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  3. Jin-Sheng Guo
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  4. Chih-Wei Shih
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  5. Wen-Cheng Chang
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  6. Huang-Wei Chang
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  7. Chun-Chung Shaw
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Correspondence to Wen-Cheng Chang.

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Hsieh, CC., Huang, ST., Guo, JS. et al. Effect of a carbon additive on the TbCu7-type melt-spun Sm(Co, M)7 (M=Ti, Zr, Hf, V and Ge) ribbons. Journal of the Korean Physical Society 63, 401–404 (2013). https://doi.org/10.3938/jkps.63.401

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  • DOI: https://doi.org/10.3938/jkps.63.401

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