Metals and materials international

  • 제24권6호
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  • Pages.1262-1274
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  • 2018
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  • 1598-9623(pISSN)
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  • 2005-4149(eISSN)
대한금속재료학회 (The Korean Institute of Metals and Materials)
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High-Efficiency Inhibition of Gravity Segregation in Al-Bi Immiscible Alloys by Adding Lanthanum

  • Jia, Peng (School of Material Science and Engineering, University of Jinan) ;
  • Zhang, Jinyang (School of Material Science and Engineering, University of Jinan) ;
  • Geng, Haoran (School of Material Science and Engineering, University of Jinan) ;
  • Teng, Xinying (School of Material Science and Engineering, University of Jinan) ;
  • Zhao, Degang (School of Material Science and Engineering, University of Jinan) ;
  • Yang, Zhongxi (School of Material Science and Engineering, University of Jinan) ;
  • Wang, Yi (State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology) ;
  • Hu, Song (State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology) ;
  • Xiang, Jun (State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology) ;
  • Hu, Xun (School of Material Science and Engineering, University of Jinan)
  • 투고 : 2017.09.08
  • 심사 : 2018.04.23
  • 발행 : 2018.11.20
⟨ 이전 논문 다음 논문 ⟩

초록

The inhibition of gravity segregation has been a long-standing challenge in fabrication and applications of homogeneous immiscible alloys. Therefore, the effect of rare-earth La on the gravity segregation of Al-Bi immiscible alloys was investigated to understand the homogenization mechanism. The results showed that the addition of La can completely suppress the gravity segregation. This is attributed to the nucleation of Bi-rich liquid phase on the in-situ produced $LaBi_2$ phase and the change of the shape of $LaBi_2@Bi$ droplets. In addition, a novel strategy is developed to prepare the homogeneous immiscible alloys through the addition of rare-earth elements. This strategy not only is applicable to other immiscible alloys, but also is conducive to finding more elements to suppress the gravity segregation. This study provided a useful reference for the fabrication of the homogeneous immiscible alloys.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, Natural Science Foundation of Shandong Province

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  3. Correlation of composition, cooling rate and superheating temperature with solidification behaviors and microstructures of Al-Bi-Sn ribbons vol.6, pp.6, 2018, https://doi.org/10.1088/2053-1591/ab0afd
  4. Evaluation of hot corrosion performance of HVOF coatings on PCGTA welded Fe-based alloy A-286 in Na2SO4%-7.5%NaVO3%-5%NaCl environment vol.8, pp.4, 2018, https://doi.org/10.1088/2051-672x/abc8f8
  5. Evaluating Microstructure, Wear Resistance and Tensile Properties of Al-Bi(-Cu, -Zn) Alloys for Lightweight Sliding Bearings vol.11, pp.1, 2018, https://doi.org/10.3390/met11010153